The QME48T40 DC-DC Series of converters provide outstanding thermal performance in high temperature environments. This performance is accomplished through the use of patented/patent-pending circuits, packaging, and processing techniques to achieve ultra-high efficiency, excellent thermal management, and a low-body profile. The low-body profile and the preclusion of heat sinks minimize impedance to system airflow, thus enhancing cooling for both upstream and downstream devices. The use of 100% automation for assembly, coupled with advanced electronic circuits and thermal design, results in a product with extremely high reliability. Operating from a 36-75 V input, the QME48T40 converters provide any standard output voltage from 3.3 V down to 1.0 V that can be trimmed from - 20% to +10% of the nominal output voltage (10% for output voltages 1.2 V and 1.0 V), thus providing outstanding design flexibility. RoHS lead-free solder and lead-solder-exempted products are available Delivers up to 40 A Outputs available: 3.3, 2.5, 1.8, 1.5, 1.2 and 1.0 V Industry-standard quarter-brick pinout On-board input differential LC-filter Startup into pre-biased load No minimum load required Dimensions: 1.45" x 2.30" x 0.425" (36.83 x 58.42 x 10.80 mm) Weight: 1.2 oz [34.2 g] Meets Basic Insulation requirements of EN60950 Withstands 100 V input transient for 100 ms Fixed-frequency operation Fully protected Remote output sense Non-Latching / Latching OTP option Positive or negative logic ON/OFF option Output voltage trim range: +10%/-20% with industry-standard trim equations (10% for 1.2 V and 1.0 V) High reliability: MTBF = 13.9 million hours, calculated per Telcordia TR332, Method I Case 1 Approved to the following Safety Standards: UL/CSA60950-1, EN60950-1, and IEC60950-1 Designed to meet Class B conducted emissions per FCC and EN55022 when used with external filter All materials meet UL94, V-0 flammability rating QME48T40 Series 2 1. Conditions: TA = 25C, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, All output voltages, unless otherwise specified. PARAMETER CONDITIONS / DESCRIPTION MIN TYP MAX UNITS Absolute Maximum Ratings Input Voltage 0 80 VDC Operating Ambient Temperature Continuous -40 85 C Storage Temperature -55 125 C Input Characteristics Operating Input Voltage Range 36 48 75 VDC 33 34 35 VDC 31 32 33 VDC 100 VDC Input Under Voltage Lockout Turn-on Threshold Turn-off Threshold Input Voltage Transient 100 ms Isolation Characteristics I/O Isolation 2000 Isolation Capacitance VDC 2 Isolation Resistance nF 10 M Feature Characteristics Switching Frequency 460 Output Voltage Trim Range 1 Remote Sense Compensation 1 kHz Non-latching (3.3 - 1.5 V) -20 +10 % Non-latching (1.2 V and 1.0 V) -10 +10 % +10 % 140 % Percent of VOUT(nom) Output Overvoltage Protection Non-latching Auto-Restart Period Applies to all protection features 117 Turn-On Time 128 200 ms 4 ms ON/OFF Control (Positive Logic) Converter Off (logic low) -20 0.8 VDC Converter On (logic high) 2.4 20 VDC ON/OFF Control (Negative Logic) Converter Off (logic high) 2.4 20 VDC Converter On (logic low) -20 0.8 VDC 1) Vout can be increased up to 10% via the sense leads or 10% via the trim function. However, the total output voltage trim from all sources should not exceed 10% of VOUT(nom), in order to ensure specified operation of overvoltage protection circuitry tech.support@psbel.com QME48T40 Series 3 2. 2.1 These power converters have been designed to be stable with no external capacitors when used in low inductance input and output circuits. In many applications, the inductance associated with the distribution from the power source to the input of the converter can affect the stability of the converter. The addition of a 33 F electrolytic capacitor with an ESR < 1 across the input helps to ensure stability of the converter. In many applications, the user has to use decoupling capacitance at the load. The power converter will exhibit stable operation with external load capacitance up to 40,000 F on 3.3 V - 1.0 V outputs. Additionally, see the EMC section of this data sheet for discussion of other external components which may be required for control of conducted emissions. 2.2 The ON/OFF pin is used to turn the power converter on or off remotely via a system signal. There are two remote control options available, positive and negative logic, with both referenced to Vin(-). A typical connection is shown in Fig. 1. Vin (+) QME Series Converter (Top View) ON/OFF Vin Vout (+) SENSE (+) TRIM Rload SENSE (-) Vin (-) Vout (-) CONTROL INPUT Figure 1. Circuit configuration for ON/OFF function. The positive logic version turns on when the ON/OFF pin is at a logic high and turns off when at a logic low. The converter is on when the ON/OFF pin is left open. See the Electrical Specifications for logic high/low definitions. The negative logic version turns on when the pin is at a logic low and turns off when the pin is at a logic high. The ON/OFF pin can be hardwired directly to Vin(-) to enable automatic power up of the converter without the need of an external control signal. The ON/OFF pin is internally pulled up to 5 V through a resistor. A properly debounced mechanical switch, open-collector transistor, or FET can be used to drive the input of the ON/OFF pin. The device must be capable of sinking up to 0.2 mA at a low level voltage of 0.8 V. An external voltage source (20 V maximum) may be connected directly to the ON/OFF input, in which case it must be capable of sourcing or sinking up to 1 mA depending on the signal polarity. See the Startup Information section for system timing waveforms associated with use of the ON/OFF pin. 2.3 The remote sense feature of the converter compensates for voltage drops occurring between the output pins of the converter and the load. The SENSE(-) (Pin 5) and SENSE(+) (Pin 7) pins should be connected at the load or at the point where regulation is required (see Fig. 2). QME Series Vin (+) Converter Rw Vout (+) 100 (Top View) Vin ON/OFF SENSE (+) TRIM Rload SENSE (-) 10 Vin (-) Vout (+) Rw Figure 2. Remote sense circuit configuration Europe, Middle East +353 61 225 977 North America +1 408 785 5200 (c) 2017 Bel Power Solutions & Protection BCD.00817_AB Asia-Pacific +86 755 298 85888 QME48T40 Series 4 CAUTION If remote sensing is not utilized, the SENSE(-) pin must be connected to the Vout(-) pin (Pin 4), and the SENSE(+) pin must be connected to the Vout(+) pin (Pin 8) to ensure the converter will regulate at the specified output voltage. If these connections are not made, the converter will deliver an output voltage that is slightly higher than the specified data sheet value. Because the sense leads carry minimal current, large traces on the end-user board are not required. However, sense traces should be run side by side and located close to a ground plane to minimize system noise and ensure optimum performance. The converter's output overvoltage protection (OVP) senses the voltage across Vout(+) and Vout(-), and not across the sense lines, so the resistance (and resulting voltage drop) between the output pins of the converter and the load should be minimized to prevent unwanted triggering of the OVP. When utilizing the remote sense feature, care must be taken not to exceed the maximum allowable output power capability of the converter, which is equal to the product of the nominal output voltage and the allowable output current for the given conditions. When using remote sense, the output voltage at the converter can be increased by as much as 10% above the nominal rating in order to maintain the required voltage across the load. Therefore, the designer must, if necessary, decrease the maximum current (originally obtained from the derating curves) by the same percentage to ensure the converter's actual output power remains at or below the maximum allowable output power. 2.4 The output voltage can be adjusted up 10% or down 20% for Vout 1.5 V, and 10% for Vout = 1.2 V and 1.0 V relative to the rated output voltage by the addition of an externally connected resistor. The TRIM pin should be left open if trimming is not being used. To minimize noise pickup, a 0.1 F capacitor is connected internally between the TRIM and SENSE(-) pins. To increase the output voltage, refer to Fig. 3. A trim resistor, RT-INCR, should be connected between the TRIM (Pin 6) and SENSE(+) (Pin 7), with a value of: RTINCR 5.11(100 )VONOM 626 10.22 1.225 RTINCR 84.6 7.2 RTINCR 120 9 [k] (3.3-1.5V) [k] (1.2V) [k] (1.0V) where, RT-INCR = Required value of trim-up resistor k] VO-NOM = Nominal value of output voltage [V] (VO -REQ VO -NOM) X 100 [%] VO -NOM Vo-REQ = Desired (trimmed) output voltage [V]. When trimming up, care must be taken not to exceed the converter`s maximum allowable output power. See previous section for a complete discussion of this requirement. tech.support@psbel.com QME48T40 Series 5 QME Series Vin (+) Converter (Top View) Vin ON/OFF Vout (+) SENSE (+) R T-INCR TRIM Rload SENSE (-) Vin (-) Vout (-) Figure 3. Configuration for increasing output voltage. To decrease the output voltage (Fig. 4), a trim resistor, RT-DECR, should be connected between the TRIM (Pin 6) and SENSE() (Pin 5), with a value of: RTDECR 511 10.22 || [k] (3.3 - 1.5V) RTDECR 700 15 [k] (1.2V) || RTDECR 700 17 [k] (1.0V) || where, RT-DECR Required value of trim-down resistor [k] and is as defined above. Note: The above equations for calculation of trim resistor values match those typically used in conventional industry-standard quarter-bricks (except for 1.2 V and 1.0 V outputs). Vin (+) QME Series Converter (Top View) Vin ON/OFF Vout (+) SENSE (+) TRIM Rload R T-DECR SENSE (-) Vin (-) Vout (-) Figure 4. Configuration for decreasing output voltage. Trimming/sensing beyond 110% of the rated output voltage is not an acceptable design practice, as this condition could cause unwanted triggering of the output overvoltage protection (OVP) circuit. The designer should ensure that the difference between the voltages across the converter's output pins and its sense pins does not exceed 10% of VOUT(nom), or: [VOUT() VOUT()] [VSENSE() VSENSE()] VO - NOM X10% [V] This equation is applicable for any condition of output sensing and/or output trim. Europe, Middle East +353 61 225 977 North America +1 408 785 5200 (c) 2017 Bel Power Solutions & Protection BCD.00817_AB Asia-Pacific +86 755 298 85888 QME48T40 Series 6 3. Input under voltage lockout is standard with this converter. The converter will shut down when the input voltage drops below a pre-determined voltage. The input voltage must be typically 34 V for the converter to turn on. Once the converter has been turned on, it will shut off when the input voltage drops typically below 32 V. This feature is beneficial in preventing deep discharging of batteries used in telecom applications. The converter is protected against overcurrent or short circuit conditions. Upon sensing an overcurrent condition, the converter will switch to constant current operation and thereby begin to reduce output voltage. When the output voltage drops below 60% of the nominal value of output voltage, the converter will shut down. Once the converter has shut down, it will attempt to restart nominally every 200 ms with a typical 3-5% duty cycle. The attempted restart will continue indefinitely until the overload or short circuit conditions are removed or the output voltage rises above 40-50% of its nominal value. Once the output current is brought back into its specified range, the converter automatically exits the hiccup mode and continues normal operation. The converter will shut down if the output voltage across Vout(+) (Pin 8) and Vout(-) (Pin 4) exceeds the threshold of the OVP circuitry. The OVP circuitry contains its own reference, independent of the output voltage regulation loop. Once the converter has shut down, it will attempt to restart every 200 ms until the OVP condition is removed. The converter will shut down under an over temperature condition to protect itself from overheating caused by operation outside the thermal derating curves, or operation in abnormal conditions such as system fan failure. After the converter has cooled to a safe operating temperature, it will automatically restart. The converters meet North American and International safety regulatory requirements per UL60950 and EN60950 (pending). Basic Insulation is provided between input and output. To comply with safety agencies' requirements, an input line fuse must be used external to the converter. The Table below provides the recommended fuse rating for use with this family of products. OUTPUT VOLTAGE FUSE RATING 3.3 V 2.5 -1.8 V 1.5 - 1.0 V 7.5 A 5A 3A Modules are UL approved for maximum fuse rating of 15 Amps. To protect a group of modules with a single fuse, the rating can be increased from the recommended values above. EMC requirements must be met at the end-product system level, as no specific standards dedicated to EMC characteristics of board mounted component dc-dc converters exist. However, Bel Power Solutions tests its converters to several system level standards, primary of which is the more stringent EN55022, Information technology equipment - Radio disturbance characteristics-Limits and methods of measurement. An effective internal LC differential filter significantly reduces input reflected ripple current, and improves EMC. With the addition of a simple external filter, all versions of the QME-Series of converters pass the requirements of Class B conducted emissions per EN55022 and FCC requirements. Please contact Bel Power Solutions Applications Engineering for details of this testing. tech.support@psbel.com QME48T40 Series 7 VIN Scenario #1: Initial Startup From Bulk Supply ON/OFF function enabled, converter started via application of VIN. See Figure 5. Time t0 t1 t2 t3 Comments ON/OFF pin is ON; system front-end power is toggled on, VIN to converter begins to rise. VIN crosses Under-Voltage Lockout protection circuit threshold; converter enabled. Converter begins to respond to turn-on command (converter turn-on delay). Converter VOUT reaches 100% of nominal value ON/OFF STATE OFF ON VOUT For this example, the total converter startup time (t3- t1) is typically 4 ms. t0 t1 t2 t t3 Figure 5. Start-up scenario #1. Scenario #2: Initial Startup Using ON/OFF Pin With VIN previously powered, converter started via ON/OFF pin. See Figure 6. Time t0 t1 t2 t3 Comments VINPUT at nominal value. Arbitrary time when ON/OFF pin is enabled (converter enabled). End of converter turn-on delay. Converter VOUT reaches 100% of nominal value. VIN ON/OFF STATE OFF ON For this example, the total converter startup time (t3- t1) is typically 4 ms. VOUT t0 t1 t2 t3 t Figure 6. Startup scenario #2. Scenario #3: Turn-off and Restart Using ON/OFF Pin With VIN previously powered, converter is disabled and then enabled via ON/OFF pin. See Figure 7. Time t0 t1 t2 t3 t4 t5 Comments VIN and VOUT are at nominal values; ON/OFF pin ON. ON/OFF pin arbitrarily disabled; converter output falls to zero; turn-on inhibit delay period (200 ms typical) is initiated, and ON/OFF pin action is internally inhibited. ON/OFF pin is externally re-enabled. If (t2- t1) 200 ms, external action of ON/OFF pin is locked out by startup inhibit timer. If (t2- t1) > 200 ms, ON/OFF pin action is internally enabled. Turn-on inhibit delay period ends. If ON/OFF pin is ON, converter begins turn-on; if off, converter awaits ON/OFF pin ON signal; see Figure 6. End of converter turn-on delay. Converter VOUT reaches 100% of nominal value. Figure 7. Startup scenario #3. For the condition, (t2- t1) 200 ms, the total converter startup time (t5- t2) is typically 204 ms. For (t2- t1) > 200 ms, startup will be typically 4 ms after release of ON/OFF pin. Europe, Middle East +353 61 225 977 North America +1 408 785 5200 (c) 2017 Bel Power Solutions & Protection BCD.00817_AB Asia-Pacific +86 755 298 85888 QME48T40 Series 8 4. The converter has been characterized for many operational aspects, to include thermal derating (maximum load current as a function of ambient temperature and airflow) for vertical and horizontal mountings, efficiency, startup and shutdown parameters, output ripple and noise, transient response to load step-change, overload, and short circuit. The following pages contain specific plots or waveforms associated with the converter. Additional comments for specific data are provided below. All data presented were taken with the converter soldered to a test board, specifically a 0.060" thick printed wiring board (PWB) with four layers. The top and bottom layers were not metalized. The two inner layers, comprised of two-ounce copper, were used to provide traces for connectivity to the converter. The lack of metalization on the outer layers as well as the limited thermal connection ensured that heat transfer from the converter to the PWB was minimized. This provides a worst-case but consistent scenario for thermal derating purposes. All measurements requiring airflow were made in the vertical and horizontal wind tunnel using Infrared (IR) thermography and thermocouples for thermometry. Ensuring components on the converter do not exceed their ratings is important to maintaining high reliability. If one anticipates operating the converter at or close to the maximum loads specified in the derating curves, it is prudent to check actual operating temperatures in the application. Thermographic imaging is preferable; if this capability is not available, then thermocouples may be used. The use of AWG #40 gauge thermocouples is recommended to ensure measurement accuracy. Careful routing of the thermocouple leads will further minimize measurement error. Refer to Fig. 8 for the optimum measuring thermocouple locations. Figure 8. Location of the thermocouple for thermal testing. Load current vs. ambient temperature and airflow rates are given in Fig. x.9 and Fig. x.10 for vertical and horizontal converter mountings. Ambient temperature was varied between 25 C and 85 C, with airflow rates from 30 to 500 LFM (0.15 to 2.5 m/s). For each set of conditions, the maximum load current was defined as the lowest of: (i) (ii) The output current at which any FET junction temperature does not exceed a maximum specified temperature of 120 C as indicated by the thermographic image, or The nominal rating of the converter (40 A). During normal operation, derating curves with maximum FET temperature less or equal to 120 C should not be exceeded. Temperature on the PCB at thermocouple locations shown in Fig. 8 should not exceed 120 C in order to operate inside the derating curves. 4.4 Fig. x.11 shows the efficiency vs. load current plot for ambient temperature of 25 C, airflow rate of 300 LFM (1.5 m/s) with horizontal mounting and input voltages of 36 V, 48 V and 72 V. Also, a plot of efficiency vs. load current, as a function of ambient temperature with Vin = 48 V, airflow rate of 200 LFM (1 m/s) with horizontal mounting is shown in Fig. x.12. tech.support@psbel.com QME48T40 Series 9 Fig. x.13 shows the power dissipation vs. load current plot for Ta = 25 C, airflow rate of 300 LFM (1.5 m/s) with horizontal mounting and input voltages of 36 V, 48 V and 72 V. Also, a plot of power dissipation vs. load current, as a function of ambient temperature with Vin = 48 V, airflow rate of 200 LFM (1 m/s) with horizontal mounting is shown in Fig. x.14. Output voltage waveforms, during the turn-on transient using the ON/OFF pin for full rated load currents (resistive load) are shown without and with external load capacitance in Figs. x.15-16, respectively. Fig. x.19 show the output voltage ripple waveform, measured at full rated load current with a 10 F tantalum and 1 F ceramic capacitor across the output. Note that all output voltage waveforms are measured across a 1 F ceramic capacitor. The input reflected ripple current waveforms are obtained using the test setup shown in Fig x.20. The corresponding waveforms are shown in Figs. x.21-22. Europe, Middle East +353 61 225 977 North America +1 408 785 5200 (c) 2017 Bel Power Solutions & Protection BCD.00817_AB Asia-Pacific +86 755 298 85888 QME48T40 Series 10 5. Conditions: TA = 25 C, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Vout = 3.3 VDC unless otherwise specified. PARAMETER CONDITIONS / DESCRIPTION MIN TYP MAX UNITS 36 48 75 VDC 33 34 35 VDC 31 32 Input Characteristics Operating Input Voltage Range Input Under Voltage Lockout Turn-on Threshold Turn-off Threshold 33 VDC 100 VDC 4.1 ADC Input Voltage Transient 100 ms Maximum Input Current 40 ADC Out @ 36 VDC In Input Stand-by Current Vin = 48V, converter disabled 3 mA Input No Load Current (0 load on the output) Vin = 48V, converter enabled 50 mA Input Reflected-Ripple Current, is Vin = 48V, 25 MHz bandwidth 10 mAPK-PK Input Voltage Ripple Rejection 120 Hz 60 dB Output Characteristics External Load Capacitance Plus full load (resistive) Output Current Range 40,000 F 40 ADC 47 52 ADC 50 60 A 0 Current Limit Inception Non-latching Peak Short-Circuit Current Non-latching, Short = 10 m RMS Short-Circuit Current Non-latching Output Voltage Set Point (no load) 42 9 3.267 Output Regulation Over Line Output Regulation Over Load Arms 3.300 3.333 VDC 2 5 mV 2 5 mV +1.5 %Vout 55 110 mVPK-PK VOUT = 1.0 VDC Full load + 10 F tantalum + 1 F ceramic 35 70 mVPK-PK Co = 1 F ceramic (Fig. 3.3V.17) 502 mV Co = 470 F POS + 1 F ceramic 1302 mV Output Voltage Range Over line, load and temperature1 Output Ripple and Noise - 25 MHz bandwidth VOUT = 3.3 VDC Full load + 10 F tantalum + 1 F ceramic -1.5 Dynamic Response Load Change 50%-75%-50% of Iout Max, di/dt = 0.1 A/s di/dt = 5 A/s Settling Time to 1% of Vout 15 2 s Efficiency 100% Load 91.0 % 50% Load 92.0 % 1) 2) Operating ambient temperature range of -40 C to 85 C for converter. See waveforms for dynamic response and settling time for different output voltages. tech.support@psbel.com QME48T40 Series 11 50 50 40 Load Current [Adc] Load Current [Adc] 40 30 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) NC - 30 LFM (0.15 m/s) 20 10 30 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) NC - 30 LFM (0.15 m/s) 20 10 0 0 20 30 40 50 60 70 80 20 90 30 40 50 60 70 80 90 Ambient Temperature [C] Ambient Temperature [C] Figure 3.3V.9. Available load current vs. ambient air temperature and airflow rates for QME48T40033 converter with G height pins mounted vertically with air flowing from pin 1 to pin 3, MOSFET temperature 120 C, Vin = 48 V. Figure 3.3V.10. Available load current vs. ambient air temperature and airflow rates for QME48T40033 converter with G height pins mounted horizontally with air flowing from pin 1 to pin 3, MOSFET temperature 120 C, Vin = 48 V. Note: NC - Natural convection 0.95 0.95 0.90 Efficiency Efficiency 0.90 0.85 72 V 48 V 36 V 0.80 0.85 70 C 55 C 40 C 0.80 0.75 0.75 0 8 16 24 32 40 48 0 8 16 24 32 40 48 Load Current [Adc] Load Current [Adc] Figure 3.3V.11. Efficiency vs. load current and input voltage for QME48T40033 converter mounted horizontally with air flowing from pin 1 to pin 3 at a rate of 300 LFM (1.5 m/s) and Ta = 25 C. Figure 3.3V.12. Efficiency vs. load current and ambient temperature for QME48T40033 converter mounted horizontally with Vin = 48 V and air flowing from pin 1 to pin 3 at a rate of 200 LFM (1.0 m/s). Europe, Middle East +353 61 225 977 North America +1 408 785 5200 (c) 2017 Bel Power Solutions & Protection BCD.00817_AB Asia-Pacific +86 755 298 85888 QME48T40 Series 18.00 18.00 15.00 15.00 Power Dissipation [W] Power Dissipation [W] 12 12.00 9.00 6.00 72 V 48 V 36 V 3.00 12.00 9.00 6.00 70 C 55 C 40 C 3.00 0.00 0.00 0 5 10 15 20 25 30 35 Load Current [Adc] Figure 3.3V.13. Power dissipation vs. load current and input voltage for QME48T40033 converter mounted horizontally with air flowing from pin 1 to pin 3 at a rate of 300 LFM (1.5 m/s) and Ta = 25 C. 0 8 16 24 32 40 48 Load Current [Adc] Figure 3.3V.14. Power dissipation vs. load current and ambient temperature for QME48T40033 converter mounted horizontally with Vin = 48 V and air flowing from pin 1 to pin 3 at a rate of 200 LFM (1.0 m/s). Figure 3.3V.15. Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 48 V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 2 ms/div. Figure 3.3V.16. Turn-on transient at full rated load current (resistive) plus 10,000 F at Vin = 48 V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 2 ms/div. Figure 3.3V.17. Output voltage response to load current stepchange (20 A - 30 A - 20 A) at Vin = 48 V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (10 A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2 ms/div. Figure 3.3V.18. Output voltage response to load current stepchange (20 A - 30 A - 20 A) at Vin = 48 V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (10 A/div.). Current slew rate: 5 A/s. Co = 470 F POS + 1 F ceramic. Time scale: 0.2 ms/div. tech.support@psbel.com QME48T40 Series 13 iS 10 H source inductance Vsource iC 33 F ESR <1 electrolytic capacitor QME Series DC/DC Converter 1 F ceramic capacitor Vout Figure 3.3V.19. Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1 F ceramic and Vin = 48 V. Time scale: 1 s/div. Figure 3.3V.20. Test setup for measuring input reflected ripple currents, ic and is. Figure 3.3V.21. Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 48 V. Refer to Fig. 3.3V.20 for test setup. Time scale: 1 s/div. Figure 3.3V.22. Input reflected ripple current, is (10 mA/div.), measured through 10 H at the source at full rated load current and Vin = 48 V. Refer to Fig. 3.3V.20 for test setup. Time scale: 1 s/div. Figure 3.3V.23. Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. Figure 3.3V.24. Load current (top trace, 20 A/div., 50 ms/div.) into a 10 m short circuit during restart, at Vin = 48 V. Bottom trace (20 A/div., 2 ms/div.) is an expansion of the on-time portion of the top trace. Europe, Middle East +353 61 225 977 North America +1 408 785 5200 (c) 2017 Bel Power Solutions & Protection BCD.00817_AB Asia-Pacific +86 755 298 85888 QME48T40 Series 14 Conditions: TA = 25 C, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Vout = 2.5 VDC unless otherwise specified. PARAMETER CONDITIONS / DESCRIPTION MIN TYP MAX UNITS 36 48 75 VDC 33 34 35 VDC 31 32 Input Characteristics Operating Input Voltage Range Input Under Voltage Lockout Turn-on Threshold Turn-off Threshold 33 VDC 100 VDC 3.2 ADC Input Voltage Transient 100 ms Maximum Input Current 40 ADC Out @ 36 VDC In Input Stand-by Current Vin = 48V, converter disabled 3 mA Input No Load Current (0 load on the output) Vin = 48V, converter enabled 47 mA Input Reflected-Ripple Current, is Vin = 48V, 25 MHz bandwidth 9 mAPK-PK Input Voltage Ripple Rejection 120 Hz 60 dB Output Characteristics External Load Capacitance Plus full load (resistive) Output Current Range 40,000 F 40 ADC 47 52 ADC 50 60 A 0 Current Limit Inception Non-latching Peak Short-Circuit Current Non-latching, Short = 10 m RMS Short-Circuit Current Non-latching Output Voltage Set Point (no load) 42 9 2.475 Output Regulation Over Line Output Regulation Over Load Arms 2.500 2.525 VDC 2 5 mV 2 5 mV +1.5 %Vout 55 110 mVPK-PK VOUT = 1.0 VDC Full load + 10 F tantalum + 1 F ceramic 35 70 mVPK-PK Co = 1 F ceramic (Fig. 2.5V.17) 502 mV Co = 470 F POS + 1 F ceramic 1302 mV Output Voltage Range Over line, load and temperature1 Output Ripple and Noise - 25 MHz bandwidth VOUT = 3.3 VDC Full load + 10 F tantalum + 1 F ceramic -1.5 Dynamic Response Load Change 50%-75%-50% of Iout Max, di/dt = 0.1 A/s di/dt = 5 A/s Settling Time to 1% of Vout 15 2 s Efficiency 100% Load 89.0 % 50% Load 91.0 % 1) 2) Operating ambient temperature range of -40 C to 85 C for converter. See waveforms for dynamic response and settling time for different output voltages. tech.support@psbel.com 15 50 50 40 40 Load Current [Adc] Load Current [Adc] QME48T40 Series 30 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) NC - 30 LFM (0.15 m/s) 20 10 30 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) NC - 30 LFM (0.15 m/s) 20 10 0 0 20 30 40 50 60 70 80 20 90 30 40 50 60 70 80 90 Ambient Temperature [C] Ambient Temperature [C] Figure 2.5V.9. Available load current vs. ambient air temperature and airflow rates for QME48T40025 converter with G height pins mounted vertically with air flowing from pin 1 to pin 3, MOSFET temperature 120 C, Vin = 48 V. Figure 2.5V.10. Available load current vs. ambient air temperature and airflow rates for QME48T40025 converter with G height pins mounted horizontally with air flowing from pin 1 to pin 3, MOSFET temperature 120 C, Vin = 48 V. 0.95 0.95 0.90 0.90 0.85 0.85 Efficiency Efficiency Note: NC - Natural convection 0.80 72 V 48 V 36 V 0.75 0.80 70 C 55 C 40 C 0.75 0.70 0.70 0 8 16 24 32 40 48 0 Load Current [Adc] 8 16 24 32 40 48 Load Current [Adc] Figure 2.5V.11. Efficiency vs. load current and input voltage for QME48T40025 converter mounted horizontally with air flowing from pin 1 to pin 3 at a rate of 300 LFM (1.5 m/s) and Ta = 25 C. Figure 2.5V.12. Efficiency vs. load current and ambient temperature for QME48T40025 converter mounted horizontally with Vin = 48 V and air flowing from pin 1 to pin 3 at a rate of 200 LFM (1.0 m/s). Europe, Middle East +353 61 225 977 North America +1 408 785 5200 (c) 2017 Bel Power Solutions & Protection BCD.00817_AB Asia-Pacific +86 755 298 85888 QME48T40 Series 18.00 18.00 15.00 15.00 Power Dissipation [W] Power Dissipation [W] 16 12.00 9.00 6.00 72 V 48 V 36 V 3.00 12.00 9.00 6.00 70 C 55 C 40 C 3.00 0.00 0.00 0 8 16 24 32 40 48 Load Current [Adc] Figure 2.5V.13. Power dissipation vs. load current and input voltage for QME48T40025 converter mounted horizontally with air flowing from pin 1 to pin 3 at a rate of 300 LFM (1.5 m/s) and Ta = 25 C. 0 8 16 24 32 40 48 Load Current [Adc] Figure 2.5V.14. Power dissipation vs. load current and ambient temperature for QME48T40025 converter mounted horizontally with Vin = 48 V and air flowing from pin 1 to pin 3 at a rate of 200 LFM (1.0 m/s). Figure 2.5V.15. Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 48 V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 2 ms/div. Figure 2.5V.16. Turn-on transient at full rated load current (resistive) plus 10,000 F at Vin = 48 V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 2 ms/div. Figure 2.5V.17. Output voltage response to load current stepchange (20 A - 30 A - 20 A) at Vin = 48 V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (10 A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2 ms/div. Figure 2.5V.18. Output voltage response to load current stepchange (20 A - 30 A - 20 A) at Vin = 48 V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (10 A/div.). Current slew rate: 5A/s. Co = 470 F POS + 1 F ceramic. Time scale: 0.2 ms/div. tech.support@psbel.com QME48T40 Series 17 iS 10 H source inductance Vsource iC 33 F ESR <1 electrolytic capacitor QME Series DC/DC Converter 1 F ceramic capacitor Vout Figure 2.5V.19. Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1 F ceramic and Vin = 48 V. Time scale: 1 s/div. Figure 2.5V.20. Test setup for measuring input reflected ripple currents, ic and is. Figure 2.5V.21. Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 48 V. Refer to Fig. 2.5V.20 for test setup. Time scale: 1 s/div. Figure 2.5V.22. Input reflected ripple current, is (10 mA/div.), measured through 10 H at the source at full rated load current and Vin = 48 V. Refer to Fig. 2.5V.20 for test setup. Time scale: 1 s/div. Figure 2.5V.23. Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. Figure 2.5V.24. Load current (top trace, 20 A/div., 50 ms/div.) into a 10 m short circuit during restart, at Vin = 48 V. Bottom trace (20 A/div., 2 ms/div.) is an expansion of the on-time portion of the top trace. Europe, Middle East +353 61 225 977 North America +1 408 785 5200 (c) 2017 Bel Power Solutions & Protection BCD.00817_AB Asia-Pacific +86 755 298 85888 QME48T40 Series 18 Conditions: TA = 25 C, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Vout = 1.8 VDC unless otherwise specified. PARAMETER CONDITIONS / DESCRIPTION MIN TYP MAX UNITS 36 48 75 VDC 33 34 35 VDC 31 32 Input Characteristics Operating Input Voltage Range Input Under Voltage Lockout Turn-on Threshold Turn-off Threshold 33 VDC 100 VDC 2.4 ADC Input Voltage Transient 100 ms Maximum Input Current 40 ADC Out @ 36 VDC In Input Stand-by Current Vin = 48V, converter disabled 3 mA Input No Load Current (0 load on the output) Vin = 48V, converter enabled 45 mA Input Reflected-Ripple Current, is Vin = 48V, 25 MHz bandwidth 9 mAPK-PK Input Voltage Ripple Rejection 120 Hz 60 dB Output Characteristics External Load Capacitance Plus full load (resistive) Output Current Range 40,000 F 40 ADC 47 52 ADC 50 60 A 0 Current Limit Inception Non-latching Peak Short-Circuit Current Non-latching, Short = 10 m RMS Short-Circuit Current Non-latching Output Voltage Set Point (no load) 42 9 1.782 Output Regulation Over Line Output Regulation Over Load Arms 1.800 1.818 VDC 2 5 mV 2 5 mV +1.5 %Vout 55 110 mVPK-PK VOUT = 1.0 VDC Full load + 10 F tantalum + 1 F ceramic 35 70 mVPK-PK Co = 1 F ceramic (Fig. 1.8V.17) 502 mV Co = 470 F POS + 1 F ceramic 1302 mV Output Voltage Range Over line, load and temperature1 Output Ripple and Noise - 25 MHz bandwidth VOUT = 3.3 VDC Full load + 10 F tantalum + 1 F ceramic -1.5 Dynamic Response Load Change 50%-75%-50% of Iout Max, di/dt = 0.1 A/s di/dt = 5 A/s Settling Time to 1% of Vout 15 2 s Efficiency 100% Load 86.5 % 50% Load 88.5 % 1) 2) Operating ambient temperature range of -40 C to 85 C for converter. See waveforms for dynamic response and settling time for different output voltages. tech.support@psbel.com 19 50 50 40 40 Load Current [Adc] Load Current [Adc] QME48T40 Series 30 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) NC - 30 LFM (0.15 m/s) 20 10 30 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) NC - 30 LFM (0.15 m/s) 20 10 0 0 20 30 40 50 60 70 80 90 20 30 40 Ambient Temperature [C] 50 60 70 80 90 Ambient Temperature [C] Figure 1.8V.9. Available load current vs. ambient air temperature and airflow rates for QME48T40018 converter with G height pins mounted vertically with air flowing from pin 1 to pin 3, MOSFET temperature 120 C, Vin = 48 V. Figure 1.8V.10. Available load current vs. ambient air temperature and airflow rates for QME48T40018 converter with G height pins mounted horizontally with air flowing from pin 1 to pin 3, MOSFET temperature 120 C, Vin = 48 V. 0.95 0.95 0.90 0.90 0.85 0.85 Efficiency Efficiency Note: NC - Natural convection 0.80 0.75 0.80 0.75 72 V 48 V 36 V 0.70 70 C 55 C 40 C 0.70 0.65 0.65 0 8 16 24 32 40 48 0 Load Current [Adc] 8 16 24 32 40 48 Load Current [Adc] Figure 1.8V.11. Efficiency vs. load current and input voltage for QME48T40018 converter mounted horizontally with air flowing from pin 1 to pin 3 at a rate of 300 LFM (1.5 m/s) and Ta = 25 C. Figure 1.8V.12. Efficiency vs. load current and ambient temperature for QME48T40018 converter mounted horizontally with Vin = 48 V and air flowing from pin 1 to pin 3 at a rate of 200 LFM (1.0 m/s). Europe, Middle East +353 61 225 977 North America +1 408 785 5200 (c) 2017 Bel Power Solutions & Protection BCD.00817_AB Asia-Pacific +86 755 298 85888 QME48T40 Series 20 15.00 15.00 12.00 Power Dissipation [W] Power Dissipation [W] 12.00 9.00 6.00 72 V 48 V 36 V 3.00 9.00 6.00 70 C 55 C 40 C 3.00 0.00 0.00 0 8 16 24 32 40 48 Load Current [Adc] Figure 1.8V.13. Power dissipation vs. load current and input voltage for QME48T40018 converter mounted horizontally with air flowing from pin 1 to pin 3 at a rate of 300 LFM (1.5 m/s) and Ta = 25 C. 0 8 16 24 32 40 48 Load Current [Adc] Figure 1.8V.14. Power dissipation vs. load current and ambient temperature for QME48T40018 converter mounted horizontally with Vin = 48 V and air flowing from pin 1 to pin 3 at a rate of 200 LFM (1.0 m/s). Figure 1.8V.15. Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 48 V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 2 ms/div. Figure 1.8V.16. Turn-on transient at full rated load current (resistive) plus 10,000 F at Vin = 48 V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 2 ms/div. Figure 1.8V.17. Output voltage response to load current stepchange (20 A - 30 A - 20 A) at Vin = 48 V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (10 A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2 ms/div. Figure 1.8V.18. Output voltage response to load current stepchange (20 A - 30 A - 20 A) at Vin = 48 V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (10 A/div.). Current slew rate: 5 A/s. Co = 470 F POS + 1 F ceramic. Time scale: 0.2 ms/div. tech.support@psbel.com QME48T40 Series 21 iS 10 H source inductance Vsource iC 33 F ESR <1 electrolytic capacitor QME Series DC/DC Converter 1 F ceramic capacitor Vout Figure 1.8V.19. Output voltage ripple (20mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1 F ceramic and Vin = 48 V. Time scale: 1 s/div. Figure 1.8V.20. Test setup for measuring input reflected ripple currents, ic and is. Figure 1.8V.21. Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 48 V. Refer to Fig. 1.8V.20 for test setup. Time scale: 1 s/div. Figure 1.8V.22. Input reflected ripple current, is (10 mA/div.), measured through 10 H at the source at full rated load current and Vin = 48 V. Refer to Fig. 1.8V.20 for test setup. Time scale: 1 s/div. Figure 1.8V.23. Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. Figure 1.8V.24. Load current (top trace, 20 A/div., 50 ms/div.) into a 10 m short circuit during restart, at Vin = 48 V. Bottom trace (20 A/div., 2 ms/div.) is an expansion of the on-time portion of the top trace. Europe, Middle East +353 61 225 977 North America +1 408 785 5200 (c) 2017 Bel Power Solutions & Protection BCD.00817_AB Asia-Pacific +86 755 298 85888 QME48T40 Series 22 Conditions: TA = 25 C, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Vout = 1.5 VDC unless otherwise specified. PARAMETER CONDITIONS / DESCRIPTION MIN TYP MAX UNITS 36 48 75 VDC 33 34 35 VDC 31 32 Input Characteristics Operating Input Voltage Range Input Under Voltage Lockout Turn-on Threshold Turn-off Threshold 33 VDC 100 VDC 2.0 ADC Input Voltage Transient 100 ms Maximum Input Current 40 ADC Out @ 36 VDC In Input Stand-by Current Vin = 48V, converter disabled 3 mA Input No Load Current (0 load on the output) Vin = 48V, converter enabled 44 mA Input Reflected-Ripple Current, is Vin = 48V, 25 MHz bandwidth 9 mAPK-PK Input Voltage Ripple Rejection 120 Hz 60 dB Output Characteristics External Load Capacitance Plus full load (resistive) Output Current Range 40,000 F 40 ADC 47 52 ADC 50 60 A 0 Current Limit Inception Non-latching Peak Short-Circuit Current Non-latching, Short = 10 m RMS Short-Circuit Current Non-latching Output Voltage Set Point (no load) 42 9 1.485 Output Regulation Over Line Output Regulation Over Load Arms 1.500 1.515 VDC 2 5 mV 2 5 mV +1.5 %Vout 55 110 mVPK-PK VOUT = 1.0 VDC Full load + 10 F tantalum + 1 F ceramic 35 70 mVPK-PK Co = 1 F ceramic (Fig. 1.5V.17) 502 mV Co = 470 F POS + 1 F ceramic 1302 mV Output Voltage Range Over line, load and temperature1 Output Ripple and Noise - 25 MHz bandwidth VOUT = 3.3 VDC Full load + 10 F tantalum + 1 F ceramic -1.5 Dynamic Response Load Change 50%-75%-50% of Iout Max, di/dt = 0.1 A/s di/dt = 5 A/s Settling Time to 1% of Vout 15 2 s Efficiency 100% Load 84.5 % 50% Load 87.0 % 1) 2) Operating ambient temperature range of -40 C to 85 C for converter. See waveforms for dynamic response and settling time for different output voltages. tech.support@psbel.com 23 50 50 40 40 Load Current [Adc] Load Current [Adc] QME48T40 Series 30 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) NC - 30 LFM (0.15 m/s) 20 10 30 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) NC - 30 LFM (0.15 m/s) 20 10 0 0 20 30 40 50 60 70 80 90 20 30 40 Ambient Temperature [C] 50 60 70 80 90 Ambient Temperature [C] Figure 1.5V.9. Available load current vs. ambient air temperature and airflow rates for QME48T40015 converter with G height pins mounted vertically with air flowing from pin 1 to pin 3, MOSFET temperature 120 C, Vin = 48 V. Figure 1.5V.10. Available load current vs. ambient air temperature and airflow rates for QME48T40015 converter with G height pins mounted horizontally with air flowing from pin 1 to pin 3, MOSFET temperature 120 C, Vin = 48 V. 0.95 0.95 0.90 0.90 0.85 0.85 Efficiency Efficiency Note: NC - Natural convection 0.80 0.75 72 V 48 V 36 V 0.70 0.80 0.75 70 C 55 C 40 C 0.70 0.65 0.65 0.60 0.60 0 8 16 24 32 40 48 0 8 16 24 32 40 48 Load Current [Adc] Load Current [Adc] Figure 1.5V.11. Efficiency vs. load current and input voltage for QME48T40015 converter mounted horizontally with air flowing from pin 1 to pin 3 at a rate of 300 LFM (1.5 m/s) and Ta = 25 C. Figure 1.5V.12. Efficiency vs. load current and ambient temperature for QME48T40015 converter mounted horizontally with Vin = 48 V and air flowing from pin 1 to pin 3 at a rate of 200 LFM (1.0 m/s). Europe, Middle East +353 61 225 977 North America +1 408 785 5200 (c) 2017 Bel Power Solutions & Protection BCD.00817_AB Asia-Pacific +86 755 298 85888 QME48T40 Series 15.00 15.00 12.00 12.00 Power Dissipation [W] Power Dissipation [W] 24 9.00 6.00 72 V 48 V 36 V 3.00 9.00 6.00 70 C 55 C 40 C 3.00 0.00 0.00 0 8 16 24 32 40 48 Load Current [Adc] Figure 1.5V.13. Power dissipation vs. load current and input voltage for QME48T40015 converter mounted horizontally with air flowing from pin 1 to pin 3 at a rate of 300 LFM (1.5 m/s) and Ta = 25 C. 0 8 16 24 32 40 48 Load Current [Adc] Figure 1.5V.14. Power dissipation vs. load current and ambient temperature for QME48T40015 converter mounted horizontally with Vin = 48 V and air flowing from pin 1 to pin 3 at a rate of 200 LFM (1.0 m/s). Figure 1.5V.15. Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 48 V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 2 ms/div. Figure 1.5V.16. Turn-on transient at full rated load current (resistive) plus 10,000 F at Vin = 48 V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 2 ms/div. Figure 1.5V.17. Output voltage response to load current stepchange (20 A - 30 A - 20 A) at Vin = 48 V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (10 A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2 ms/div. Figure 1.5V.18. Output voltage response to load current stepchange (20 A - 30 A - 20 A) at Vin = 48 V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (10 A/div.). Current slew rate: 5A/s. Co = 470 F POS + 1 F ceramic. Time scale: 0.2 ms/div. tech.support@psbel.com QME48T40 Series 25 iS 10 H source inductance V source iC 33 F ESR < 1 electrolytic capacitor QmaX TM Series DC-DC Converter 1 F ceramic Vout capacitor Figure 1.5V.20. Test setup for measuring input reflected ripple currents, ic and is. Figure 1.5V.19. Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1 F ceramic and Vin = 48 V. Time scale: 1 s/div. Figure 1.5V.21. Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 48 V. Refer to Fig. 1.5V.20 for test setup. Time scale: 1 s/div. Figure 1.5V.23. Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. Figure 1.5V.22. Input reflected ripple current, is (10 mA/div.), measured through 10 H at the source at full rated load current and Vin = 48 V. Refer to Fig. 1.5V.20 for test setup. Time scale: 1 s/div.. Figure 1.5V.24. Load current (top trace, 20 A/div., 50 ms/div.) into a 10 m short circuit during restart, at Vin = 48 V. Bottom trace (20 A/div., 2 ms/div.) is an expansion of the on-time portion of the top trace. Europe, Middle East +353 61 225 977 North America +1 408 785 5200 (c) 2017 Bel Power Solutions & Protection BCD.00817_AB Asia-Pacific +86 755 298 85888 QME48T40 Series 26 Conditions: TA = 25 C, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Vout = 1.2 VDC unless otherwise specified. PARAMETER CONDITIONS / DESCRIPTION MIN TYP MAX UNITS 36 48 75 VDC 33 34 35 VDC 31 32 Input Characteristics Operating Input Voltage Range Input Under Voltage Lockout Turn-on Threshold Turn-off Threshold 33 VDC 100 VDC 1.6 ADC Input Voltage Transient 100 ms Maximum Input Current 40 ADC Out @ 36 VDC In Input Stand-by Current Vin = 48V, converter disabled 3 mA Input No Load Current (0 load on the output) Vin = 48V, converter enabled 43 mA Input Reflected-Ripple Current, is Vin = 48V, 25 MHz bandwidth 8 mAPK-PK Input Voltage Ripple Rejection 120 Hz 60 dB Output Characteristics External Load Capacitance Plus full load (resistive) Output Current Range 40,000 F 40 ADC 47 52 ADC 50 60 A 0 Current Limit Inception Non-latching Peak Short-Circuit Current Non-latching, Short = 10 m RMS Short-Circuit Current Non-latching Output Voltage Set Point (no load) 42 9 1.182 Output Regulation Over Line Output Regulation Over Load Arms 1.200 1.218 VDC 2 5 mV 2 5 mV +1.5 %Vout 55 110 mVPK-PK VOUT = 1.0 VDC Full load + 10 F tantalum + 1 F ceramic 35 70 mVPK-PK Co = 1 F ceramic (Fig. 1.2V.17) 502 mV Co = 470 F POS + 1 F ceramic 1302 mV Output Voltage Range Over line, load and temperature1 Output Ripple and Noise - 25 MHz bandwidth VOUT = 3.3 VDC Full load + 10 F tantalum + 1 F ceramic -1.5 Dynamic Response Load Change 50%-75%-50% of Iout Max, di/dt = 0.1 A/s di/dt = 5 A/s Settling Time to 1% of Vout 15 2 s Efficiency 100% Load 82.0 % 50% Load 85.0 % 1) 2) Operating ambient temperature range of -40 C to 85 C for converter. See waveforms for dynamic response and settling time for different output voltages. tech.support@psbel.com 27 50 50 40 40 Load Current [Adc] Load Current [Adc] QME48T40 Series 30 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) NC - 30 LFM (0.15 m/s) 20 10 30 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) NC - 30 LFM (0.15 m/s) 20 10 0 0 20 30 40 50 60 70 80 90 20 30 40 Ambient Temperature [C] 50 60 70 80 90 Ambient Temperature [C] Figure 1.2V.9. Available load current vs. ambient air temperature and airflow rates for QME48T40012 converter with G height pins mounted vertically with air flowing from pin 1 to pin 3, MOSFET temperature 120 C, Vin = 48 V. Figure 1.2V.10. Available load current vs. ambient air temperature and airflow rates for QME48T40012 converter with G height pins mounted horizontally with air flowing from pin 1 to pin 3, MOSFET temperature 120 C, Vin = 48 V. 0.90 0.90 0.85 0.85 0.80 0.80 Efficiency Efficiency Note: NC - Natural convection 0.75 0.70 72 V 48 V 36 V 0.75 0.70 0.65 70 C 55 C 40 C 0.65 0.60 0.60 0 8 16 24 32 40 48 0 8 16 24 32 40 48 Load Current [Adc] Load Current [Adc] Figure 1.2V.11. Efficiency vs. load current and input voltage for QME48T40012 converter mounted horizontally with air flowing from pin 1 to pin 3 at a rate of 300 LFM (1.5 m/s) and Ta = 25 C. Figure 1.2V.12. Efficiency vs. load current and ambient temperature for QME48T40012 converter mounted horizontally with Vin = 48 V and air flowing from pin 1 to pin 3 at a rate of 200 LFM (1.0 m/s). Europe, Middle East +353 61 225 977 North America +1 408 785 5200 (c) 2017 Bel Power Solutions & Protection BCD.00817_AB Asia-Pacific +86 755 298 85888 QME48T40 Series 15.00 15.00 12.00 12.00 Power Dissipation [W] Power Dissipation [W] 28 9.00 6.00 72 V 48 V 36 V 3.00 9.00 6.00 70 C 55 C 40 C 3.00 0.00 0.00 0 8 16 24 32 40 48 Load Current [Adc] 0 8 16 24 32 40 48 Load Current [Adc] Figure 1.2V.13. Power dissipation vs. load current and input voltage for QME48T40012 converter mounted horizontally with air flowing from pin 1 to pin 3 at a rate of 300 LFM (1.5 m/s) and Ta = 25 C. Figure 1.2V.14. Power dissipation vs. load current and ambient temperature for QME48T40012 converter mounted horizontally with Vin = 48 V and air flowing from pin 1 to pin 3 at a rate of 200 LFM (1.0 m/s). Figure 1.2V.15. Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 48 V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 2 ms/div. Figure 1.2V.16. Turn-on transient at full rated load current (resistive) plus 10,000 F at Vin = 48 V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 2 ms/div. Figure 1.2V.17. Output voltage response to load current stepchange (20 A - 30 A - 20 A) at Vin = 48 V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (10 A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2 ms/div. Figure 1.2V.18. Output voltage response to load current stepchange (20 A - 30 A - 20 A) at Vin = 48 V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (10 A/div.). Current slew rate: 5 A/s. Co = 470 F POS + 1 F ceramic. Time scale: 0.2 ms/div. tech.support@psbel.com QME48T40 Series 29 iS 10 H source inductance Vsource iC 33 F ESR <1 electrolytic capacitor QME Series DC/DC Converter 1 F ceramic capacitor Vout Figure 1.2V.19. Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1 F ceramic and Vin = 48 V. Time scale: 1 s/div. Figure 1.2V.20. Test setup for measuring input reflected ripple currents, ic and is. Figure 1.2V.21. Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 48 V. Refer to Fig. 1.2V.20 for test setup. Time scale: 1 s/div. Figure 1.2V.22. Input reflected ripple current, is (10 mA/div.), measured through 10 H at the source at full rated load current and Vin = 48 V. Refer to Fig. 1.2V.20 for test setup. Time scale: 1 s/div. Figure 1.2V.23. Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. Figure 1.2V.24. Load current (top trace, 20 A/div., 50 ms/div.) into a 10 m short circuit during restart, at Vin = 48 V. Bottom trace (20 A/div., 5 ms/div.) is an expansion of the on-time portion of the top trace. Europe, Middle East +353 61 225 977 North America +1 408 785 5200 (c) 2017 Bel Power Solutions & Protection BCD.00817_AB Asia-Pacific +86 755 298 85888 QME48T40 Series 30 Conditions: TA = 25 C, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Vout = 1.0 VDC unless otherwise specified. PARAMETER CONDITIONS / DESCRIPTION MIN TYP MAX UNITS 36 48 75 VDC 33 34 35 VDC 31 32 Input Characteristics Operating Input Voltage Range Input Under Voltage Lockout Turn-on Threshold Turn-off Threshold 33 VDC 100 VDC 1.4 ADC Input Voltage Transient 100 ms Maximum Input Current 40 ADC Out @ 36 VDC In Input Stand-by Current Vin = 48V, converter disabled 3 mA Input No Load Current (0 load on the output) Vin = 48V, converter enabled 43 mA Input Reflected-Ripple Current, is Vin = 48V, 25 MHz bandwidth 8 mAPK-PK Input Voltage Ripple Rejection 120 Hz 60 dB Output Characteristics External Load Capacitance Plus full load (resistive) Output Current Range 40,000 F 40 ADC 47 52 ADC 50 60 A 0 Current Limit Inception Non-latching Peak Short-Circuit Current Non-latching, Short = 10 m RMS Short-Circuit Current Non-latching Output Voltage Set Point (no load) 42 9 0.985 Output Regulation Over Line Output Regulation Over Load Arms 1.000 1.015 VDC 2 5 mV 2 5 mV +1.5 %Vout 55 110 mVPK-PK VOUT = 1.0 VDC Full load + 10 F tantalum + 1 F ceramic 35 70 mVPK-PK Co = 1 F ceramic (Fig. 1.0V.17) 502 mV Co = 470 F POS + 1 F ceramic 1302 mV Output Voltage Range Over line, load and temperature1 Output Ripple and Noise - 25 MHz bandwidth VOUT = 3.3 VDC Full load + 10 F tantalum + 1 F ceramic -1.5 Dynamic Response Load Change 50%-75%-50% of Iout Max, di/dt = 0.1 A/s di/dt = 5 A/s Settling Time to 1% of Vout 15 2 s Efficiency 100% Load 80.0 % 50% Load 83.0 % 1) 2) Operating ambient temperature range of -40 C to 85 C for converter. See waveforms for dynamic response and settling time for different output voltages. tech.support@psbel.com 31 50 50 40 40 Load Current [Adc] Load Current [Adc] QME48T40 Series 30 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) NC - 30 LFM (0.15 m/s) 20 10 30 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) NC - 30 LFM (0.15 m/s) 20 10 0 0 20 30 40 50 60 70 80 90 20 30 40 Ambient Temperature [C] Figure 1.0V.9. Available load current vs. ambient air temperature and airflow rates for QME48T40010 converter with G height pins mounted vertically with air flowing from pin 1 to pin 3, MOSFET temperature 120 C, Vin = 48 V. 50 60 70 80 90 Ambient Temperature [C] Figure 1.0V.10. Available load current vs. ambient air temperature and airflow rates for QME48T40010 converter with G height pins mounted horizontally with air flowing from pin 1 to pin 3, MOSFET temperature 120 C, Vin = 48 V. Note: NC - Natural convection 0.85 0.90 0.80 Efficiency Efficiency 0.80 0.70 72 V 48 V 36 V 0.60 0.75 70 C 55 C 40 C 0.70 0.65 0.50 0 8 16 24 32 40 48 0 8 16 24 32 40 48 Load Current [Adc] Load Current [Adc] Figure 1.0V.11. Efficiency vs. load current and input voltage for QME48T40010 converter mounted horizontally with air flowing from pin 1 to pin 3 at a rate of 300 LFM (1.5 m/s) and Ta = 25 C. Figure 1.0V.12. Efficiency vs. load current and ambient temperature for QME48T40010 converter mounted horizontally with Vin = 48 V and air flowing from pin 1 to pin 3 at a rate of 200 LFM (1.0 m/s). Europe, Middle East +353 61 225 977 North America +1 408 785 5200 (c) 2017 Bel Power Solutions & Protection BCD.00817_AB Asia-Pacific +86 755 298 85888 QME48T40 Series 15.00 15.00 12.00 12.00 Power Dissipation [W] Power Dissipation [W] 32 9.00 6.00 72 V 48 V 36 V 3.00 9.00 6.00 70 C 55 C 40 C 3.00 0.00 0.00 0 8 16 24 32 40 48 Load Current [Adc] Figure 1.0V.13. Power dissipation vs. load current and input voltage for QME48T40010 converter mounted horizontally with air flowing from pin 1 to pin 3 at a rate of 300 LFM (1.5 m/s) and Ta = 25 C. Figure 1.0V.15. Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 48 V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 2 ms/div . Figure 1.0V.17. Output voltage response to load current stepchange (20 A - 30 A - 20 A) at Vin = 48 V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (10 A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2 ms/div. 0 8 16 24 32 40 48 Load Current [Adc] Figure 1.0V.14. Power dissipation vs. load current and ambient temperature for QME48T40010 converter mounted horizontally with Vin = 48 V and air flowing from pin 1 to pin 3 at a rate of 200 LFM (1.0 m/s). Figure 1.0V.16. Turn-on transient at full rated load current (resistive) plus 10,000 F at Vin = 48 V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 2 ms/div. Figure 1.0V.18. Output voltage response to load current stepchange (20 A - 30 A - 20 A) at Vin = 48 V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (10 A/div.). Current slew rate: 5 A/s. Co = 470 F POS + 1 F ceramic. Time scale: 0.2 ms/div. tech.support@psbel.com QME48T40 Series 33 iS 10 H source inductance Vsource Figure 1.0V.19. Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1 F ceramic and Vin = 48 V. Time scale: 1 s/div. iC 33 F ESR <1 electrolytic capacitor QME Series DC/DC Converter 1 F ceramic capacitor Vout Figure 1.0V.20. Test setup for measuring input reflected ripple currents, ic and is. Figure 1.0V.21. Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 48 V. Refer to Fig. 1.0V.20 for test setup. Time scale: 1 s/div. Figure 1.0V.22. Input reflected ripple current, is (10 mA/div.), measured through 10 H at the source at full rated load current and Vin = 48 V. Refer to Fig. 1.0V.20 for test setup. Time scale: 1 s/div. Figure 1.0V.23. Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. Figure 1.0V.24. Load current (top trace, 20 A/div., 50 ms/div.) into a 10 m short circuit during restart, at Vin = 48 V. Bottom trace (20 A/div., 5 ms/div.) is an expansion of the on-time portion of the top trace. Europe, Middle East +353 61 225 977 North America +1 408 785 5200 (c) 2017 Bel Power Solutions & Protection BCD.00817_AB Asia-Pacific +86 755 298 85888 QME48T40 Series 34 6. PAD/PIN CONNECTIONS Pad/Pin # Function 1 Vin (+) 2 ON/OFF 3 Vin (-) 8 1 7 2 TOP VIEW 6 5 3 4 Vout (-) 5 SENSE (-) 6 TRIM 7 SENSE (+) 8 Vout (+) 4 SIDE VIEW * * * * * PL (Pin Length) Height Option HT (Maximum Height) CL (Minimum Clearance) Pin Option G 0.425 [10.80] 0.035 [0.89] A 0.188 [4.78] B 0.145 [3.68] * All dimensions are in inches [mm] Pins 1-3 and 5-7 are O 0.040" [1.02] with O 0.078" [1.98] shoulder Pins 4 and 8 are O 0.062" [1.57] without shoulder Pin Material & Finish: Brass Alloy 360 with Matte Tin over Nickel Converter Weight: 1.02 oz [34.2 g] 0.005 [0.13] Heatsink Option HT (Maximum Height) CL (Minimum Clearance) S1 0.99 [25.1] 0.039 [1.00] Pin Option PL (Pin Length) 0.005 [0.13] B 0.145 [3.68] Tolerance Unless Otherwise Noted Linear: X.X = +/- .020 [0.5] X.XX = +/- 0.010 [0.25] X.XXX = +/- 0.005 [0.13] Angular X = +/- 2 .X = +/- .25 tech.support@psbel.com QME48T40 Series 35 7. Product1 Series Input Voltage Mounting Scheme Rated Load Current Output Voltage QME 48 T 40 033 QuarterBrick Format 1) 2) 36-75 V Through Hole 40 ADC 010 1.0 V 012 1.2 V 015 1.5 V 018 1.8 V 025 2.5 V 033 3.3 V - ON/OFF Logic Maximum Height [HT] Pin Length [PL] N G B Special Features P Positive G 0.425" A 0.188" B 0.145" Heatsin k2 No Suffix RoHS lead-solderexemption compliant No Suffix No heatsink 0 0 STD NonLatching N Negative RoHS L Latching Options F Switching frequency 440kHz G RoHS compliant for all six substances -S1 Heatsink as shown The example above describes P/N QME48T40033-NGB0: 36-75 V input, through-hole, 40 A @ 3.3 V output, negative ON/OFF logic, a 0.145" solder tail and maximum height of 0.425", standard (non-latching) protection, and Eutectic Tin/Lead solder. Consult factory for the complete list of available options. The heatsink option "S1" is only available with the model QME48T40033-NGBOG-S1 NUCLEAR AND MEDICAL APPLICATIONS - Products are not designed or intended for use as critical components in life support systems, equipment used in hazardous environments, or nuclear control systems. TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on the date manufactured. Specifications are subject to change without notice. Europe, Middle East +353 61 225 977 North America +1 408 785 5200 (c) 2017 Bel Power Solutions & Protection BCD.00817_AB Asia-Pacific +86 755 298 85888