Bel Power Solutions point-of-load converters are recommended for use with regulated bus converters in an Intermediate Bus Architecture (IBA). The YS12S16 nonisolated DC-DC converters deliver up to 16 A of output current in an industry-standard surface-mount package. Operating from a 9.6-14 VDC input, the YS12S16 converters are ideal choices for Intermediate Bus Architectures where point-of-load power delivery is generally a requirement. They provide an extremely tight regulated programmable output voltage of 0.7525 V to 5.5 V. RoHS lead-free solder and lead-solder-exempted products are available Delivers up to 16 A (88 W) Extended input range 9.6 V - 14 V High efficiency (0.948 at 5 V output) Surface-mount package Industry-standard footprint and pinout Small size and low profile: 1.30" x 0.53" x 0.314" (33.02 x 13.46 x 7.98 mm) Weight: 0.23 oz [6.50 g] Coplanarity less than 0.003", maximum Synchronous Buck Converter topology Start-up into pre-biased output No minimum load required Programmable output voltage via external resistor Operating ambient temperature: -40 C to 85 C Remote output sense Remote ON/OFF (positive or negative) Fixed-frequency operation Auto-reset output overcurrent protection Auto-reset overtemperature protection High reliability, MTBF approx. 27.2 Million Hours calculated per Telcordia TR-332, Method I Case 1 All materials meet UL94, V-0 flammability rating UL 60950 recognition in U.S. & Canada, and DEMKO certification per IEC/EN 60950 The YS12S16 converters provide exceptional thermal performance, even in high temperature environments with minimal airflow. This is accomplished through the use of advanced circuitry, packaging, and processing techniques to achieve a design possessing ultra-high efficiency, excellent thermal management and a very 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 power electronics and thermal design, results in a product with extremely high reliability. Intermediate Bus Architectures Telecommunications Data communications Distributed Power Architectures Servers, workstations High efficiency - no heat sink required Reduces total solution board area Tape and reel packing Compatible with pick & place equipment Minimizes part numbers in inventory Low cost North America +1-866.513.2839 Asia-Pacific +86.755.29885888 Europe, Middle East +353 61 225 977 tech.support@psbel.com (c) 2015 Bel Power Solutions, Inc. BCD.00645_AA YS12S16 DC-DC Converter Conditions: TA = 25 C, Airflow = 300 LFM (1.5 m/s), Vin = 12 VDC, Vout = 0.7525 - 5.5 V, unless otherwise specified. PARAMETER NOTES MIN Continuous TYP MAX UNITS Absolute Maximum Ratings Input Voltage -0.3 15 VDC Operating Ambient Temperature -40 85 C Storage Temperature -55 125 C 5.5 VDC 0.5 VDC Feature Characteristics Switching Frequency 300 Output Voltage Trim Range1 By external resistor, See Trim Table 1 Remote Sense Compensation1 Percent of VOUT(NOM) Turn-On Delay Time2 Full resistive load With Vin = (Converter Enabled, then Vin applied) 0.7525 From Vin = Vin(min) to Vo=0.1* Vo(nom) With Enable (Vin = Vin(nom) applied, then enabled) From enable to Vo= 0.1*Vo(nom) Rise time2 (Full resistive load) ON/OFF Control (Positive Logic)3 ON/OFF Control (Negative Logic) 3 From 0.1*Vo(nom) to 0.9*Vo(nom) kHz 3 ms 3 ms 4 ms Converter Off -5 0.8 VDC Converter On 2.4 Vin VDC Converter Off 2.4 Vin VDC Converter On -5 0.8 VDC 14 VDC Input Characteristics Operating Input Voltage Range 9.6 12 Input Under Voltage Lockout Turn-on Threshold Turn-off Threshold Maximum Input Current Input Reflected-Ripple Current - is VDC 8.5 VDC 16 ADC Out @ 9.6 VDC In VOUT = 5.0 VDC 8.9 ADC VOUT = 3.3 VDC 6 ADC VOUT = 2.5 VDC 4.6 ADC VOUT = 2.0 VDC 3.8 ADC VOUT = 1.8 VDC 3.4 ADC VOUT = 1.5 VDC 2.9 ADC VOUT = 1.2 VDC 2.4 ADC VOUT = 1.0 VDC 2.1 ADC VOUT = 0.7525 VDC 1.7 ADC Input Stand-by Current (Converter disabled) Input No Load Current (Converter enabled) 9 3 mA VOUT = 5.0 VDC 83 mA VOUT = 3.3 VDC 63 mA VOUT = 2.5 VDC 53 mA VOUT = 2.0 VDC 47 mA VOUT = 1.8 VDC 45 mA VOUT = 1.5 VDC 43 mA VOUT = 1.2 VDC 41 mA VOUT = 1.0 VDC 39 mA VOUT = 0.7525 VDC 35 mA VOUT = 5.0 VDC 60 mAP-P VOUT = 3.3 VDC 43 mAP-P VOUT = 2.5 VDC 35 mAP-P VOUT = 2.0 VDC 35 mAP-P VOUT = 1.8 VDC 35 mAP-P VOUT = 1.5 VDC 33 mAP-P See Fig. E for setup. (BW = 20 MHz) 866.513.2839 tech.support@psbel.com (c) 2015 Bel Power Solutions, Inc. BCD.00645_AA YS12S16 DC-DC Converter Input Voltage Ripple Rejection VOUT = 1.2 VDC 23 mAP-P VOUT = 1.0 VDC 21 mAP-P VOUT = 0.7525 VDC 19 mAP-P 120 Hz 72 dB Output Characteristics Output Voltage Set Point (no load) -1.5 Vout +1.5 %Vout Output Regulation Over Line Over Load Output Voltage Range (Over all operating input voltage, resistive load and temperature conditions until end of life ) Output Ripple and Noise - 20MHz bandwidth Full resistive load From no load to full load 0.5 mV 5 mV -2.5 +2.5 %Vout Over line, load and temperature (Fig. E) Peak-to-Peak VOUT = 0.7525 VDC 12 19 mVP-P Peak-to-Peak VOUT = 5.0 VDC 40 65 mVP-P Min ESR > 1m 1,000 F Min ESR > 10 m 5,000 F 16 A External Load Capacitance Plus full load (resistive) Output Current Range 0 Output Current Limit Inception (IOUT) Output Short- Circuit Current , RMS Value Short=10 m, continuous Dynamic Response Load current change from 8A - 16A, di/dt = 5 A/S Co = 100F ceramic + 470 F POS Settling Time (VOUT < 10% peak deviation) Unloading current change from 16A - 8A, di/dt = -5 A/S A 4 A 140 mV 45 s 140 mV 45 s VOUT = 5.0 VDC 94.8 % VOUT = 3.3 VDC 92.5 % VOUT = 2.5 VDC 90.5 % VOUT = 2.0 VDC 89.0 % VOUT = 1.8 VDC 88.0 % VOUT = 1.5 VDC 86.0 % VOUT = 1.2 VDC 84.0 % VOUT = 1.0 VDC 80.5 % VOUT = 0.7525 VDC 77.0 % Co = 100 F ceramic + 470 F POS Settling Time (VOUT < 10% peak deviation) Efficiency 25 Full load (16A) Notes: 1 The output voltage should not exceed 5.5V (taking into account both the programming and remote sense compensation). 2 Note that start-up time is the sum of turn-on delay time and rise time. 3 The converter is on if ON/OFF pin is left open. 866.513.2839 tech.support@psbel.com (c) 2015 Bel Power Solutions, Inc. BCD.00645_AA YS12S16 DC-DC Converter Input and Output Impedance The YS12S16 converter should be connected via a low impedance to the DC power source. 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. It is recommended to use decoupling capacitors (minimum 47 F) placed as close as possible to the converter input pins in order to ensure stability of the converter and reduce input ripple voltage. Internally, the converter has 30 F (low ESR ceramics) of input capacitance. In a typical application, low - ESR tantalum or POS capacitors will be sufficient to provide adequate ripple voltage filtering at the input of the converter. However, very low ESR ceramic capacitors 47 F-100 F are recommended at the input of the converter in order to minimize the input ripple voltage. They should be placed as close as possible to the input pins of the converter. The YS12S16 has been designed for stable operation with or without external capacitance. Low ESR ceramic capacitors placed as close as possible to the load (minimum 47 F) are recommended for improved transient performance and lower output voltage ripple. It is important to keep low resistance and low inductance PCB traces for connecting load to the output pins of the converter in order to maintain good load regulation. ON/OFF (Pin 1) 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 logic (standard option) and negative logic, and both are referenced to GND. The typical connections are shown in Fig. A. The positive logic version turns the converter on when the ON/OFF pin is at a logic high or left open, and turns the converter off when at a logic low or shorted to GND. Vin R* Y-Series Converter SENSE (Top View) ON/OFF Vout Vin Rload GND TRIM CONTROL INPUT R* is for negative logic option only Fig. A: Circuit configuration for ON/OFF function. The negative logic version turns the converter on when the ON/OFF pin is at logic low or left open, and turns the converter off when the ON/OFF pin is at a logic high or connected to Vin. The ON/OFF pin is internally pulled-up to Vin for a positive logic version, and pulled-down for a negative logic version. A TTL or CMOS logic gate, open collector (open drain) transistor can be used to drive the ON/OFF pin. When using open collector (open drain) transistor with a negative logic option, add a pull-up resistor (R*) of 75K to Vin as shown in Fig. A; This device must be capable of: sinking up to 0.2 mA at a low level voltage of 0.8 V sourcing up to 0.25 mA at a high logic level of 2.3 V - 5 V sourcing up to 0.75 mA when connected to Vin. Remote Sense (Pin 2) The remote sense feature of the converter compensates for voltage drops occurring only between Vout pin (Pin 4) of the converter and the load. The SENSE (Pin 2) pin should be connected at the load or at the point where regulation is required (see Fig. B). There is no sense feature on the output GND return pin, where the solid ground plane should provide low voltage drop. 866.513.2839 tech.support@psbel.com (c) 2015 Bel Power Solutions, Inc. BCD.00645_AA YS12S16 DC-DC Converter If remote sensing is not required, the SENSE pin must be connected to the Vout pin (Pin 4) 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 value. Vin Y-Series Converter SENSE (Top View) Rw ON/OFF Vout GND TRIM Vin Rload Rw Fig. B: Remote sense circuit configuration. Because the sense lead carries minimal current, large trace on the end-user board are not required. However, sense trace should be located close to a ground plane to minimize system noise and insure optimum performance. When utilizing the remote sense feature, care must be taken not to exceed the maximum allowable output power capability of the converter, 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 up to 0.5 V 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. Output Voltage Programming (Pin 3) The output voltage can be programmed from 0.7525 V to 5.5 V by connecting an external resistor between TRIM pin (Pin 3) and GND pin (Pin 5); see Fig. C. A trim resistor, RTRIM, for a desired output voltage can be calculated using the following equation: RTRIM 10.5 1 (VO -REQ - 0.7525) [k] where, RTRIM Required value of trim resistor [k] VOREQ Desired (trimmed) output voltage [V] Vin Y-Series Converter SENSE (Top View) ON/OFF Vout Vin Rload GND TRIM RTRIM Fig. C: Configuration for programming output voltage. Note that the tolerance of a trim resistor directly affects the output voltage tolerance. It is recommended to use standard 1% or 0.5% resistors; for tighter tolerance, two resistors in parallel are recommended rather than one standard value from Table 1. Ground pin of the trim resistor should be connected directly to the converter GND pin (Pin 5) with no voltage drop in between. Table 1 provides the trim resistor values for popular output voltages. 866.513.2839 tech.support@psbel.com (c) 2015 Bel Power Solutions, Inc. BCD.00645_AA YS12S16 DC-DC Converter Table 1: Trim Resistor Value V0-REG [V] 0.7525 1.0 1.2 1.5 1.8 2.0 2.5 3.3 5.0 5.5 RTRIM [k] open 41.42 22.46 13.05 9.02 7.42 5.01 3.12 1.47 1.21 The Closest Standard Value [k] 41.2 22.6 13.0 9.09 7.50 4.99 3.09 1.47 1.21 The output voltage can be also programmed by external voltage source. To make trimming less sensitive, a series external resistor Rext is recommended between TRIM pin and programming voltage source. Control Voltage can be calculated by the formula: VCTRL 0.7 (1 REXT)(V O-REQ - 0.7525) 15 [V] where, VCTRL Control voltage [V] REXT External resistor between TRIM pin and voltage source; the value can be chosen depending on the required output voltage range [k]. Control voltages with REXT 0 and REXT 15K are shown in Table 2. Table 2: Control Voltage [VDC] V0-REG [V] 0.7525 1.0 1.2 1.5 1.8 2.0 2.5 3.3 5.0 5.5 VCTRL (REXT = 0) 0.700 0.684 0.670 0.650 0.630 0.617 0.584 0.530 0.417 0.384 VCTRL(REXT = 15K) 0.700 0.436 0.223 -0.097 -0.417 -0.631 -1.164 -2.017 -3.831 -4.364 Input Undervoltage Lockout Input undervoltage lockout is standard with this converter. The converter will shut down when the input voltage drops below a pre-determined voltage; it will start automatically when Vin returns to a specified range. The input voltage must be at least 9.6V (typically 9V) for the converter to turn on. Once the converter has been turned on, it will shut off when the input voltage drops below typically 8.5V. Output Overcurrent Protection (OCP) The converter is protected against overcurrent and short circuit conditions. Upon sensing an over-current condition, the converter will enter hiccup mode. Once over-load or short circuit condition is removed, Vout will return to nominal value. 866.513.2839 tech.support@psbel.com (c) 2015 Bel Power Solutions, Inc. BCD.00645_AA YS12S16 DC-DC Converter Overtemperature Protection (OTP) 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. Safety Requirements The converter meets North American and International safety regulatory requirements per UL60950 and EN60950. The maximum DC voltage between any two pins is Vin under all operating conditions. Therefore, the unit has ELV (extra low voltage) output; it meets SELV requirements under the condition that all input voltages are ELV. The converter is not internally fused. To comply with safety agencies requirements, a recognized fuse with a maximum rating of 15 Amps must be used in series with the input line. General Information 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 mounting, efficiency, start-up and shutdown parameters, output ripple and noise, transient response to load step-change, overload and short circuit. The figures are numbered as Fig. x.y, where x indicates the different output voltages, and y associates with specific plots (y = 1 for the vertical thermal derating, ...). For example, Fig. x.1 will refer to the vertical thermal derating for all the output voltages in general. The following pages contain specific plots or waveforms associated with the converter. Additional comments for specific data are provided below. Test Conditions 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, comprising twoounce 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 facilities 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. . It is recommended the use of AWG #40 gauge thermocouples to ensure measurement accuracy. Careful routing of the thermocouple leads will further minimize measurement error. Refer to Fig. D for optimum measuring thermocouple locations. Fig. D: Location of the thermocouple for thermal testing. 866.513.2839 tech.support@psbel.com (c) 2015 Bel Power Solutions, Inc. BCD.00645_AA YS12S16 DC-DC Converter Thermal Derating Load current vs. ambient temperature and airflow rates are given in Figs. x.1 for maximum temperature of 120 C. Ambient temperature was varied between 25 C and 85 C, with airflow rates from 30 to 500 LFM (0.15 m/s to 2.5 m/s), and vertical converter mounting. The airflow during the testing is parallel to the short axis of the converter, going from pin 1 and pin 6 to pins 2 - 5. For each set of conditions, the maximum load current is defined as the lowest of: (i) The output current at which any MOSFET temperature does not exceed a maximum specified temperature (120 C) as indicated by the thermo-graphic image, or (ii) The maximum current rating of the converter (16 A) During normal operation, derating curves with maximum FET temperature less than or equal to 120 C should not be exceeded. Temperature on the PCB at the thermocouple location shown in Fig. D should not exceed 120 C in order to operate inside the derating curves. Efficiency Figure x.2 shows the efficiency vs. load current plot for ambient temperature of 25 C, airflow rate of 200 LFM (1 m/s) and input voltages of 9.6 V, 12 V, and 14 V. Power Dissipation Fig. x.3 shows the power dissipation vs. load current plot for Ta = 25 C, airflow rate of 200 LFM (1 m/s) with vertical mounting and input voltages of 9.6 V, 12 V, and 14 V. Ripple and Noise The output voltage ripple waveform is measured at full rated load current. Note that all output voltage waveforms are measured across a 1 F ceramic capacitor. The output voltage ripple and input reflected ripple current waveforms are obtained using the test setup shown in Figure E. iS 1 H source inductance Vsource Y-Series CIN 4x47F ceramic capacitor DC/DC Converter 1F ceramic capacitor CO 100F ceramic capacitor Vout Fig. E: Test setup for measuring input reflected ripple currents, is and output voltage ripple. 866.513.2839 tech.support@psbel.com (c) 2015 Bel Power Solutions, Inc. BCD.00645_AA 20 1.00 16 0.95 12 0.90 Efficiency Load Current [Adc] YS12S16 DC-DC Converter 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) 30 LFM (0.15 m/s) 8 4 0.85 14 V 12 V 9.6 V 0.80 0 0.75 20 30 40 50 60 70 80 90 Ambient Temperature [C] 0 3 6 9 12 15 18 Load Current [Adc] Fig. 5.0V.1: Available load current vs. ambient temperature and airflow rates for Vout = 5.0V converter mounted vertically with Vin = 12V, and maximum MOSFET temperature 120C. Fig. 5.0V.2: Efficiency vs. load current and input voltage for Vout = 5.0V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25C. 6 Power Dissipation [W] 5 4 3 2 14 V 12 V 9.6 V 1 0 0 3 6 9 12 15 18 Load Current [Adc] Fig. 5.0V.3: Power loss vs. load current and input voltage for Vout = 5.0V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25C. Fig. 5.0V.5: Output voltage ripple (20mV/div.) at full rated load current into a resistive load with external capacitance 100F ceramic + 1F ceramic and Vin = 12V for Vout = 5.0V. Time scale: 2s/div. Fig. 5.0V.4: Turn-on transient for Vout = 5.0V with application of Vin at full rated load current (resistive) and 100F external capacitance at Vin = 12V. Top trace: Vin (10V/div.); Bottom trace: output voltage (1V/div.); Time scale: 2ms/div. Fig. 5.0V.6: Output voltage response for Vout = 5.0V to positive load current step change from 8A to 16A with slew rate of 5A/s at Vin = 12V. Top trace: output voltage (200mV/div.); Bottom trace: load current (5A/div.). Co = 100F ceramic. Time scale: 20s/div. 866.513.2839 tech.support@psbel.com (c) 2015 Bel Power Solutions, Inc. BCD.00645_AA YS12S16 DC-DC Converter 20 1.00 16 0.95 12 0.90 Efficiency Load Current [Adc] Fig. 5.0V.7: Output voltage response for Vout = 5.0V to negative load current step change from 16A to 8A with slew rate of -5A/s at Vin = 12V. Top trace: output voltage (200mV/div.); Bottom trace: load current (5A/div.). Co = 100F ceramic. Time scale: 20s/div. 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) 30 LFM (0.15 m/s) 8 4 0.85 14 V 12 V 9.6 V 0.80 0.75 0 20 30 40 50 60 70 80 90 0 3 6 9 12 15 18 Load Current [Adc] Ambient Temperature [C] Fig. 3.3V.1: Available load current vs. ambient temperature and airflow rates for Vout = 3.3V converter mounted vertically with Vin = 12V, and maximum MOSFET temperature 120C. Fig. 3.3V.2: Efficiency vs. load current and input voltage for Vout = 3.3V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25C. 6 Power Dissipation [W] 5 4 3 2 14 V 12 V 9.6 V 1 0 0 3 6 9 12 15 18 Load Current [Adc] Fig. 3.3V.3: Power loss vs. load current and input voltage for Vout = 3.3V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25C. Fig. 3.3V.4: Turn-on transient for Vout = 3.3V with application of Vin at full rated load current (resistive) and 100F external capacitance at Vin = 12V. Top trace: Vin (10V/div.); Bottom trace: output voltage (1V/div.); Time scale: 2ms/div. 866.513.2839 tech.support@psbel.com (c) 2015 Bel Power Solutions, Inc. BCD.00645_AA YS12S16 DC-DC Converter Fig. 3.3V.5: Output voltage ripple (20mV/div.) at full rated load current into a resistive load with external capacitance 100F ceramic + 1F ceramic and Vin = 12V for Vout = 3.3V. Time scale: 2s/div. Fig. 3.3V.6: Output voltage response for Vout = 3.3V to positive load current step change from 8A to 16A with slew rate of 5A/s at Vin = 12V. Top trace: output voltage (200mV/div.); Bottom trace: load current (5A/div.). Co = 100F ceramic. Time scale: 20s/div. 20 1.00 16 0.95 12 0.90 Efficiency Load Current [Adc] Fig. 3.3V.7: Output voltage response for Vout = 3.3V to negative load current step change from 16A to 8A with slew rate of -5A/s at Vin = 12V. Top trace: output voltage (200mV/div.); Bottom trace: load current (5A/div.). Co = 100F ceramic. Time scale: 20s/div. 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) 30 LFM (0.15 m/s) 8 4 0.85 14 V 12 V 9.6 V 0.80 0 0.75 20 30 40 50 60 70 80 Ambient Temperature [C] Fig. 2.5V.1: Available load current vs. ambient temperature and airflow rates for Vout = 2.5V converter mounted vertically with Vin = 12V, and maximum MOSFET temperature 120C. 90 0 3 6 9 12 15 18 Load Current [Adc] Fig. 2.5V.2: Efficiency vs. load current and input voltage for Vout = 2.5V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25C. 866.513.2839 tech.support@psbel.com (c) 2015 Bel Power Solutions, Inc. BCD.00645_AA YS12S16 DC-DC Converter 6 Power Dissipation [W] 5 4 3 2 14 V 12 V 9.6 V 1 0 0 3 6 9 12 15 18 Load Current [Adc] Fig. 2.5V.3: Power loss vs. load current and input voltage for Vout = 2.5V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25C. Fig. 2.5V.5: Output voltage ripple (20mV/div.) at full rated load current into a resistive load with external capacitance 100F ceramic + 1F ceramic and Vin = 12V for Vout = 2.5V. Time scale: 2s/div. Fig. 2.5V.4: Turn-on transient for Vout = 2.5V with application of Vin at full rated load current (resistive) and 100F external capacitance at Vin = 12V. Top trace: Vin (10V/div.); Bottom trace: output voltage (1V/div.); Time scale: 2ms/div. Fig. 2.5V.6: Output voltage response for Vout = 2.5V to positive load current step change from 8A to 16A with slew rate of 5A/s at Vin = 12V. Top trace: output voltage (200mV/div.); Bottom trace: load current (5A/div.). Co = 100F ceramic. Time scale: 20s/div. Fig. 2.5V.7: Output voltage response for Vout = 2.5V to negative load current step change from 16A to 8A with slew rate of -5A/s at Vin = 12V. Top trace: output voltage (200mV/div.); Bottom trace: load current (5A/div.). Co = 100F ceramic. Time scale: 20s/div. 866.513.2839 tech.support@psbel.com (c) 2015 Bel Power Solutions, Inc. BCD.00645_AA 20 1.00 16 0.95 12 0.90 Efficiency Load Current [Adc] YS12S16 DC-DC Converter 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) 30 LFM (0.15 m/s) 8 4 0.85 14 V 12 V 9.6 V 0.80 0 0.75 20 30 40 50 60 70 80 90 Ambient Temperature [C] 0 3 6 9 12 15 18 Load Current [Adc] Fig. 2.0V.2: Efficiency vs. load current and input voltage for Vout = 2.0V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25C. Fig. 2.0V.1: Available load current vs. ambient temperature and airflow rates for Vout = 2.0V converter mounted vertically with Vin = 12V, and maximum MOSFET temperature 120C. 6 Power Dissipation [W] 5 4 3 2 14 V 12 V 9.6 V 1 0 0 3 6 9 12 15 18 Load Current [Adc] Fig. 2.0V.3: Power loss vs. load current and input voltage for Vout = 2.0V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25C. Fig. 2.0V.5: Output voltage ripple (20mV/div.) at full rated load current into a resistive load with external capacitance 100F ceramic + 1F ceramic and Vin = 12V for Vout = 2.0V. Time scale: 2s/div. Fig. 2.0V.4: Turn-on transient for Vout = 2.0V with application of Vin at full rated load current (resistive) and 100F external capacitance at Vin = 12V. Top trace: Vin (10V/div.); Bottom trace: output voltage (1V/div.); Time scale: 2ms/div. Fig. 2.0V.6: Output voltage response for Vout = 2.0V to positive load current step change from 8A to 16A with slew rate of 5A/s at Vin = 12V. Top trace: output voltage (200mV/div.); Bottom trace: load current (5A/div.). Co = 100F ceramic. Time scale: 20s/div. 866.513.2839 tech.support@psbel.com (c) 2015 Bel Power Solutions, Inc. BCD.00645_AA YS12S16 DC-DC Converter 20 1.00 16 0.95 12 0.90 Efficiency Load Current [Adc] Fig. 2.0V.7: Output voltage response for Vout = 2.0V to negative load current step change from 16A to 8A with slew rate of -5A/s at Vin = 12V. Top trace: output voltage (200mV/div.); Bottom trace: load current (5A/div.). Co = 100F ceramic. Time scale: 20s/div. 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) 30 LFM (0.15 m/s) 8 4 0.85 14 V 12 V 9.6 V 0.80 0.75 0 20 30 40 50 60 70 80 90 Ambient Temperature [C] 0 3 6 9 12 15 18 Load Current [Adc] Fig. 1.8V.1: Available load current vs. ambient temperature and airflow rates for Vout = 1.8V converter mounted vertically with Vin = 12V, and maximum MOSFET temperature 120C. Fig. 1.8V.2: Efficiency vs. load current and input voltage for Vout = 1.8V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25C. 6 Power Dissipation [W] 5 4 3 2 14 V 12 V 9.6 V 1 0 0 3 6 9 12 15 18 Load Current [Adc] Fig. 1.8V.3: Power loss vs. load current and input voltage for Vout = 1.8V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25C. Fig. 1.8V.4: Turn-on transient for Vout = 1.8V with application of Vin at full rated load current (resistive) and 100F external capacitance at Vin = 12V. Top trace: Vin (10V/div.); Bottom trace: output voltage (1V/div.); Time scale: 2ms/div. 866.513.2839 tech.support@psbel.com (c) 2015 Bel Power Solutions, Inc. BCD.00645_AA YS12S16 DC-DC Converter Fig. 1.8V.5: Output voltage ripple (20mV/div.) at full rated load current into a resistive load with external capacitance 100F ceramic + 1F ceramic and Vin = 12V for Vout = 1.8V. Time scale: 2s/div. Fig. 1.8V.6: Output voltage response for Vout = 1.8V to positive load current step change from 8A to 16A with slew rate of 5A/s at Vin = 12V. Top trace: output voltage (200mV/div.); Bottom trace: load current (5A/div.). Co = 100F ceramic. Time scale: 20s/div. 20 0.95 16 0.90 12 0.85 Efficiency Load Current [Adc] Fig. 1.8V.7: Output voltage response for Vout = 1.8V to negative load current step change from 16A to 8A with slew rate of -5A/s at Vin = 12V. Top trace: output voltage (200mV/div.); Bottom trace: load current (5A/div.). Co = 100F ceramic. Time scale: 20s/div. 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) 30 LFM (0.15 m/s) 8 4 0.80 14 V 12 V 9.6 V 0.75 0 0.70 20 30 40 50 60 70 80 90 Ambient Temperature [C] Fig. 1.5V.1: Available load current vs. ambient temperature and airflow rates for Vout = 1.5V converter mounted vertically with Vin = 12V, air flowing and maximum MOSFET temperature 120C. 0 3 6 9 12 15 18 Load Current [Adc] Fig. 1.5V.2: Efficiency vs. load current and input voltage for Vout = 1.5V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25C. 866.513.2839 tech.support@psbel.com (c) 2015 Bel Power Solutions, Inc. BCD.00645_AA YS12S16 DC-DC Converter 5 Power Dissipation [W] 4 3 2 14 V 12 V 9.6 V 1 0 0 3 6 9 12 15 18 Fig. 1.5V.3: Power loss vs. load current and input voltage for Vout = 1.5V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25C. Fig. 1.5V.4: Turn-on transient for Vout = 1.5V with application of Vin at full rated load current (resistive) and 100F external capacitance at Vin = 12V. Top trace: Vin (10V/div.); Bottom trace: output voltage (1V/div.); Time scale: 2ms/div. Fig. 1.5V.5: Output voltage ripple (20mV/div.) at full rated load current into a resistive load with external capacitance 100F ceramic + 1F ceramic and Vin = 12V for Vout = 1.5V. Time scale: 2s/div. Fig. 1.5V.6: Output voltage response for Vout = 1.5V to positive load current step change from 8A to 16A with slew rate of 5A/s at Vin = 12V. Top trace: output voltage (200mV/div.); Bottom trace: load current (5A/div.). Co = 100F ceramic. Time scale: 20s/div. Load Current [Adc] Fig. 1.5V.7: Output voltage response for Vout = 1.5V to negative load current step change from 16A to 8A with slew rate of -5A/s at Vin = 12V. Top trace: output voltage (200mV/div.); Bottom trace: load current (5A/div.). Co = 100F ceramic. Time scale: 20s/div. 866.513.2839 tech.support@psbel.com (c) 2015 Bel Power Solutions, Inc. BCD.00645_AA 20 0.95 16 0.90 12 0.85 Efficiency Load Current [Adc] YS12S16 DC-DC Converter 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) 30 LFM (0.15 m/s) 8 4 0.80 14 V 12 V 9.6 V 0.75 0 0.70 20 30 40 50 60 70 80 90 Ambient Temperature [C] 0 3 6 9 12 15 18 Load Current [Adc] Fig. 1.2V.1: Available load current vs. ambient temperature and airflow rates for Vout = 1.2V converter mounted vertically with Vin = 12V, and maximum MOSFET temperature 120C. Fig. 1.2V.2: Efficiency vs. load current and input voltage for Vout = 1.2V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25C. 5 Power Dissipation [W] 4 3 2 14 V 12 V 9.6 V 1 0 0 3 6 9 12 15 18 Load Current [Adc] Fig. 1.2V.3: Power loss vs. load current and input voltage for Vout = 1.2V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25C. Fig. 1.2V.5: Output voltage ripple (20mV/div.) at full rated load current into a resistive load with external capacitance 100F ceramic + 1F ceramic and Vin = 12V for Vout = 1.2V. Time scale: 2s/div. Fig. 1.2V.4: Turn-on transient for Vout = 1.2V with application of Vin at full rated load current (resistive) and 100F external capacitance at Vin = 12V. Top trace: Vin (10V/div.); Bottom trace: output voltage (1V/div.); Time scale: 2ms/div. Fig. 1.2V.6: Output voltage response for Vout = 1.2V to positive load current step change from 8A to 16A with slew rate of 5A/s at Vin = 12V. Top trace: output voltage (200mV/div.); Bottom trace: load current (5A/div.). Co = 100F ceramic. Time scale: 20s/div. 866.513.2839 tech.support@psbel.com (c) 2015 Bel Power Solutions, Inc. BCD.00645_AA YS12S16 DC-DC Converter Fig. 1.2V.7: Output voltage response for Vout = 1.2V to negative load current step change from 16A to 8A with slew rate of -5A/s at Vin = 12V. Top trace: output voltage (200mV/div.); Bottom trace: load current (5A/div.). Co = 100F ceramic. Time scale: 20s/div. 20 0.90 0.85 0.80 12 Efficiency Load Current [Adc] 16 500 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) 30 LFM (0.15 m/s) 8 4 0.75 0.70 14 V 12 V 9.6 V 0.65 0 0.60 20 30 40 50 60 70 80 90 Ambient Temperature [C] 0 3 6 9 12 15 18 Load Current [Adc] Fig. 1.0V.1: Available load current vs. ambient temperature and airflow rates for Vout = 1.0V converter mounted vertically with Vin = 12V, and maximum MOSFET temperature 120C. Fig. 1.0V.2: Efficiency vs. load current and input voltage for Vout = 1.0V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25C. 5 Power Dissipation [W] 4 3 2 14 V 12 V 9.6 V 1 0 0 3 6 9 12 15 18 Load Current [Adc] Fig. 1.0V.3: Power loss vs. load current and input voltage for Vout = 1.0V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25C. Fig. 1.0V.4: Turn-on transient for Vout = 1.0V with application of Vin at full rated load current (resistive) and 100F external capacitance at Vin = 12V. Top trace: Vin (10V/div.); Bottom trace: output voltage (1V/div.); Time scale: 2ms/div. 866.513.2839 tech.support@psbel.com (c) 2015 Bel Power Solutions, Inc. BCD.00645_AA YS12S16 DC-DC Converter Fig. 1.0V.5: Output voltage ripple (20mV/div.) at full rated load current into a resistive load with external capacitance 100F ceramic + 1F ceramic and Vin = 12V for Vout = 1.0V. Time scale: 2s/div. Fig. 1.0V.6: Output voltage response for Vout = 1.0V to positive load current step change from 8A to 16A with slew rate of 5A/s at Vin = 12V. Top trace: output voltage (200mV/div.); Bottom trace: load current (5A/div.). Co = 100F ceramic. Time scale: 20s/div. 20 0.90 16 0.85 12 0.80 Efficiency Load Current [Adc] Fig. 1.0V.7: Output voltage response for Vout = 1.0V to negative load current step change from 16A to 8A with slew rate of -5A/s at Vin = 12V. Top trace: output voltage (200mV/div.); Bottom trace: load current (5A/div.). Co = 100F ceramic. Time scale: 20s/div. 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) 30 LFM (0.15 m/s) 8 4 0.75 14 V 12 V 9.6 V 0.70 0 0.65 20 30 40 50 60 70 80 Ambient Temperature [C] Fig. 0.7525V.1: Available load current vs. ambient temperature and airflow rates for Vout = 1.0V converter mounted vertically with Vin = 12V, and maximum MOSFET temperature 120C. 90 0 3 6 9 12 15 18 Load Current [Adc] Fig. 0.7525V.2: Efficiency vs. load current and input voltage for Vout = 0.7525V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25C. 866.513.2839 tech.support@psbel.com (c) 2015 Bel Power Solutions, Inc. BCD.00645_AA YS12S16 DC-DC Converter 5 Power Dissipation [W] 4 3 2 14 V 12 V 9.6 V 1 0 0 3 6 9 12 15 18 Load Current [Adc] Fig. 0.7525V.3: Power loss vs. load current and input voltage for Vout = 0.7525V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25C. Fig. 0.7525V.5: Output voltage ripple (20mV/div.) at full rated load current into a resistive load with external capacitance 100F ceramic + 1F ceramic and Vin = 12V for Vout = 0.7525V. Time scale: 2s/div. Fig. 0.7525V.4: Turn-on transient for Vout = 0.7525V with application of Vin at full rated load current (resistive) and 100F external capacitance at Vin = 12V. Top trace: Vin (10V/div.); Bottom trace: output voltage (1V/div.); Time scale: 2ms/div. Fig. 0.7525V.6: Output voltage response for Vout = 0.7525V to positive load current step change from 8A to 16A with slew rate of 5A/s at Vin = 12V. Top trace: output voltage (200mV/div.); Bottom trace: load current (5A/div.). Co = 100F ceramic. Time scale: 20s/div. Fig. 0.7525V.7: Output voltage response for Vout = 0.7525V to negative load current step change from 16A to 8A with slew rate of 5A/s at Vin = 12V. Top trace: output voltage (200mV/div.); Bottom trace: load current (5A/div.). Co = 100F ceramic. Time scale: 20s/div. 866.513.2839 tech.support@psbel.com (c) 2015 Bel Power Solutions, Inc. BCD.00645_AA YS12S16 DC-DC Converter PAD/PIN CONNECTIONS Pad/Pin # Function 1 ON/OFF 2 SENSE 3 TRIM 4 Vout 5 GND 6 Vin 2 3 4 5 1(*) 6 YS12S Platform Notes TOP VIEW (*) PIN # 1 ROTATED 90 SIDE VIEW All dimensions are in inches [mm] Connector Material: Copper Connector Finish: Gold over Nickel Converter Weight: 0.23 oz [6.50 g] Converter Height: 0.327" Max., 0.301" Min. Recommended Surface-Mount Pads: Min. 0.080" X 0.112" [2.03 x 2.84] YS12S Pinout (Surface Mount) Product Series YM Y-Series Input Voltage 12 9.6 V - 14 V Mounting Scheme S S Surface-Mount Rated Load Current 16 16 A (0.7525 V to 5.5 V) - Enable Logic RoHS Compatible 0 G 0 Standard (Positive Logic) No Suffix RoHS lead-solder-exempt compliant D Opposite of Standard (Negative Logic) G RoHS compliant for all six substances The example above describes P/N YS12S16-0G: 9.6V - 14V input, surface mount, 16A at 0.7525V to 5.5V output, standard enable logic, and RoHS compliant for all six substances. Please consult factory regarding availability of a specific version. 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. 866.513.2839 tech.support@psbel.com (c) 2015 Bel Power Solutions, Inc. BCD.00645_AA YS12S16 DC-DC Converter 866.513.2839 tech.support@psbel.com (c) 2015 Bel Power Solutions, Inc. BCD.00645_AA