The PET2000-12-074xD is a 2000 Watt DC to DC power supply that converts 40-72 VDC voltage into an isolated main output of +12 VDC for powering intermediate bus architectures (IBA) in high performance and reliability servers, routers, and network switches. The PET2000-12-074xD utilizes full digital control architecture for greater efficiency, control, and functionality. This power supply meets international safety standards. * Best-in-class, "Platinum" efficiency * Wide input voltage range: 40-72 VDC * Always-On 12 V / 3 A / 36 W standby output * Hot-plug capable * Parallel operation with active current sharing * Full digital controls for improved performance * High density design: 42.1 W/in3 * Small form factor: 265 x 73.5 x 40 mm (10.43 x 2.89 x 1.57 in) * Power Management Bus communication protocol for control, programming and monitoring * Status LED with fault signaling * Networking Switches * Servers & Routers * Telecommunications PET2000-12-074xD 2 1. PET 2000 - 12 - 074 x D x Product Family Power Level Dash V1 Output Dash Width Airflow Input DC Inlet D: DC K Y PET Front-Ends 2000 W 12 V 74 mm N: Normal R: Reverse - Black, 6 AWG (C10-747100)* - Black, 4 AWG (C10-747442) - Grey, 6 AWG (C10-638974) * Default option - no suffix needed. Input plug with wire: Amphenol # CR-302001-257 2. The PET2000-12-074xD DC/DC power supply is a fully DSP controlled, highly efficient front-end power supply. It incorporates stateof-the art technology and uses an interleaved forward converter topology with active clamp and synchronous rectification to reduce component stresses, thus providing increased system reliability and very high efficiency. With a wide input DC voltage range the PET2000-12-074xD maximizes power availability in demanding server, network, and other high availability applications. The supply is fan cooled and ideally suited for integration with a matching airflow path. An active OR-ing device on the output ensures no reverse load current and renders the supply ideally suited for operation in redundant power systems. The always-on standby output provides power to external power distribution and management controllers. It is protected with an active OR-ing device for maximum reliability. Status information is provided with a front-panel LED. In addition, the power supply can be controlled and the fan speed set via the I2C bus. The I2C bus allows full monitoring of the supply, including input and output voltage, current, power, and inside temperatures. Cooling is managed by a fan controlled by the DSP controller. The fan speed is adjusted automatically depending on the actual power demand and supply temperature and can be overridden through the I2C bus. Figure 1. Block Diagram tech.support@psbel.com PET2000-12-074xD 3 3. Stresses in excess of the absolute maximum ratings may cause performance degradation, adversely affect long-term reliability and cause permanent damage to the supply. PARAMETER Vi max Maximum Input Voltage CONDITIONS / DESCRIPTION MIN MAX UNITS 72 VDC Continuous 4. General Condition: TA = 0...40 C (PET2000-12-074RD), TA = 0...55 C (PET2000-12-074ND), unless otherwise noted. PARAMETER Vi start Minimum Operating Input Voltage Vi nom Nominal Input Voltage DESCRIPTION / CONDITION MIN Stand-by output available, DSP running Input Voltage Normal operation (from Vi min to Vi max) Ii Input Current Vi > Vi min Ii pk Inrush Current Limitation From Vi min to Vi max, TA = 25C, turn on Vi on Turn-On Standby Input Voltage Ramping up Vi on Turn-On Input Voltage Ramping up Vi off Turn-Off Input Voltage Ramping down Efficiency Thold_V1 Hold-Up Time V1 Thold_sb Hold-Up Time Vsb MAX 32 UNIT VDC 53 Vi NOM 40 VDC 72 VDC A 40 55 30 A VDC 41 42 VDC 38.0 39.5 VDC Vi = -53 VDC; 20% load 93 % Vi = -53 VDC; 50% load 95 % Vi = -53 VDC; 100% load 93 % 5 6 ms 10 18 ms 167 A on I1, 2.5 A on Vsb with 2,200 F of Load capacitance 167 A on I1, 2.5 A on Vsb with 2,200 F of Load capacitance 4.1 INPUT FUSE A fast-acting 80 A input fuse in the negative voltage path inside the power supply protect against severe defects. The fuse is not accessible from the outside and are therefore not serviceable parts. 4.2 INRUSH CURRENT Internal bulk capacitors will be charged through resistors connected from bulk cap minus pin to the DC rail minus, thus limiting the inrush current. After the inrush phase, NTC resistors are then shorted with MOSFETs connected in parallel. The Inrush control is managed by the digital controller (DSP). 4.3 INPUT UNDER-VOLTAGE If the value of input DC voltage stays below the input under voltage lockout threshold Vi on, the supply will be inhibited. Once the input voltage returns within the normal operating range, the supply will return to normal operation again. If the input voltage stays below the input undervoltage lockout threshold Vi on, the supply will be inhibited. Once the input voltage returns within the normal operating range, the supply will return to normal operation again. Asia-Pacific Europe, Middle East North America +86 755 298 85888 +353 61 225 977 +1 408 785 5200 (c) 2019 Bel Power Solutions & Protection BCD.00773.0_AF1 PET2000-12-074xD 4 5. General Condition: TA = 0...40 C (PET2000-12-074RD), TA = 0...55 C (PET2000-12-074ND), unless otherwise noted. PARAMETER DESCRIPTION / CONDITION MIN NOM MAX UNIT Main Output V1 V1 nom Nominal Output Voltage V1 set Output Setpoint Accuracy dV1 tot Total Static Regulation 0.5 I1 nom, TA = 25C P1 nom Nominal Output Power I1 nom Output Current I1 peak Peak Output Current Vi min to Vi max, 0 to 100% I1 nom, TA = 0 to 40C Vi min to Vi max, TA = 0 to 55C (PET2000-12-074ND) Vi min to Vi max,, TA = 0 to 40C (PET2000-12-074RD) Vi min to Vi max,, TA = 0 to 55C (PET2000-12-074ND) Vi min to Vi max,, TA = 0 to 40C (PET2000-12-074RD) Vi min to Vi max, V1 pp Output Ripple Voltage 2 Vi min to Vi max, 0 to 100% I1 nom, Cext 1 mF/Low ESR dV1 load Load Regulation Vi nom , 0 to 100% I1 nom dV1 line Line Regulation Vi min to Vi max, 0.5 I1 nom dV1 temp Thermal Drift Vi nom HL, 0.5 I1 nom dI1 share Current Sharing Deviation from I1 tot / N, I1 > 10% VISHARE Current Share Bus Voltage I1 peak at 180 A dV1 lt Load Transient Response I1 = 40% I1 nom, I1 = 10 ... 100% I1 nom, Cext = 0 mF, dI1/dt = 1A/s, recovery within 1% of V1 nom trec 1 Recovery Time Delay time from DC applied I1 = 40% I1 nom, starting anywere from 10% to 60%, f = 50 ... 5000 Hz, Duty cycle = 10 ... 90%, Cext = 2 ...30mF, di/dt =1A/s, 25C V1 in regulation Vi = 0V to Vi min , Vi nom, Vi max tV1 rise Output Voltage Rise Time V1 = 10...90% V1 nom, Cext < 10 mF tV1 ovr sh Output Turn-on Overshoot Vi nom , 0 to 100% I1 nom dV1 sense Remote Sense Compensation for cable drop, 0 to 100% I1 nom CV1 load Capacitive Loading V1 dyn Dynamic Load Regulation tV1 on delay OVP Over voltage Trip Vi min to Vi max, 12.0 VDC -0.5 +0.5 %V1 nom -5 +5 %V1 nom 2000 0.0 0.0 W 167 ADC 120 mVpp 175.3 ADC -160 -20 0 -4 mV 20 mV -0.5 mV/C +4 ADC 9.4 0.5 11.4 10 VDC 0.6 VDC 1 ms 12.6 V 3 sec 200 ms 13.2 V 0.25 V 0 20 mF 13.6 15.0 V +2 %VSBnom +5 2.5 3.0 4.5 5 150 %VSBnom W W W W ADC ADC ADC ADC mVpp 120 mVpp Standby Output VSB VSB nom Nominal Output Voltage VSB set Output Setpoint Accuracy dVSB tot Total Regulation PSB nom Nominal Output Power PSB peak Peak Output Power ISB nom Output Current ISB peak Peak Output Current VSB pp Output Ripple Voltage 2 ISB =1.25A (50% of ISBnom, 25C, (PET2000-12-074ND)) ISB =1.50A (50% of ISBnom, 25C, (PET2000-12-074RD)) Vi min to Vi max, 0 to 100% ISB nom Vi min to Vi max, TA = 0 to 75C (PET2000-12-074ND) Vi min to Vi max, TA = 0 to 55C (PET2000-12-074RD) Vi min to Vi max (PET2000-12-074ND) Vi min to Vi max (PET2000-12-074RD) Vi min to Vi max, TA = 0 to 75C (PET2000-12-074ND) Vi min to Vi max, TA = 0 to 55C (PET2000-12-074RD) Vi min to Vi max (PET2000-12-074ND) Vi min to Vi max (PET2000-12-074RD) Vi min to Vi max, 0 to 100% ISB nom, Cext = 0 mF Load Regulation Vi nom HL, 0 to 100% ISB nom dVSB line Line Regulation Vi min to Vi max, ISB nom = 0 A dVSB temp Thermal Drift Vi nom HL, ISB nom = 0 A dISB share Current Sharing Deviation from ISB tot / N, ISB = 0.5 ISB nom 2 -5 VDC 30 36 34 40 0 0 2.85 3.4 3.8 3.5 Vi min to Vi max, 0 to 100% ISB nom, Cext 2 mF/Low ESR dVSB load 1 12.0 -2 -300 -20 4 -1 mV 20 mV -0.5 mV/C +1 ADC See also chapter TEMPERATURE AND FAN CONTROL Measured with a 10 F low ESR capacitor in parallel with a 0.1 F ceramic capacitor at the point of measurement tech.support@psbel.com PET2000-12-074xD dVSB lt trec Load Transient Response Recovery Time 5 ISB = 50% ISB nom, ISB = 0 ... 100% ISB nom, dISB/dt = 1A/s, recovery within 1% of VSB nom tVSB rise Output Voltage Rise Time ISB = 1 A, ISB = 0 ... ISB nom, f = 50 ... 5000 Hz, Duty cycle = 10 ... 90%, Cext = 0 ... 5 mF VSB = 10...90% VSB nom, Cext < 1 mF tVSB ovr sh Output Turn-on Overshoot Vi nom , 0 to 100% ISB nom CVSB load Capacitive Loading VSB dyn Dynamic Load Regulation 0.2 0.3 VDC 1 2 ms 13.2 V 20 ms 10.8 5 10 0 13.2 V 3000 F 6. Figure 2. Efficiency vs. Output Power 7. The output return path serves as power and signal ground. All output voltages and signals are referenced to these pins. To prevent a shift in signal and voltage levels due to ground wiring voltage drop a low impedance ground plane should be used as shown in Figure 3. Alternatively, separated ground signals can be used as shown in Figure 4. In this case the two ground planes should be connected together at the power supplies ground pins. Figure 3. Common low impedance ground plane Asia-Pacific Europe, Middle East North America +86 755 298 85888 +353 61 225 977 +1 408 785 5200 (c) 2019 Bel Power Solutions & Protection BCD.00773.0_AF1 PET2000-12-074xD 6 Figure 4. Separated power and signal ground Due the unit has no Input Earth Connector Terminal on the front of the unit it is mandatory to have a reliable system output GND to Earth connection. Figure 5. Block diagram with reliable System Earth connection 8. General Condition: TA = 0...40 C (PET2000-12-074RD), TA = 0...55 C (PET2000-12-074ND), unless otherwise noted. PARAMETER F Input Fuse (L) V1 OV OV Threshold V1 tV1 OV OV Trip Time V1 VVSB OV OV Threshold VSB tVSB OV OV Trip Time VSB DESCRIPTION / CONDITION MIN Not use accessible, fast acting Over Voltage V1 Protection, Latch-off Type Over Voltage V1 Protection, Automatic retry each 1s Over Current Limitation, Latch-off, Vi min to Vi max 13.6 13.6 IV1 OC Fast Fast OC Limit V1 Fast Over Current Limit. Latch-off, Vi min to Vi max 176 tV1 OC Fast 50 Over Current Limitation, Latch-off time Fast Over Current Limitation, Latch-off time Max Short Circuit Current V1 V1 < 3 V, time until IV1 is limited to < IV1 sc tV1 SC Short Circuit Regulation Time IVSB OC tVSB OC 14.3 14.3 169 OC Limit V1 Fast OC Trip time V1 MAX 80 IV1 OC Slow IV1 SC NOM UNIT A 14.5 VDC 1 ms 14.5 VDC 1 ms 175 ADC 20 s ADC 60 ms 180 A Over Current Limitation, Constant-Current Type 2 ms OC Limit VSB Over Current Limit., time until IVSB is limited to IVSB OC 6 A OC Trip time VSB Automatic shut-down 1 ms TSD Over Temperature on Heat Sinks OVP Over voltage trip 115 Vi min to Vi max 13.6 C 15.0 V tech.support@psbel.com PET2000-12-074xD 7 8.1 OVERVOLTAGE PROTECTION The PET2000-12-074xD front-end provides a fixed threshold overvoltage (OV) protection implemented with a HW comparator for both the main and the standby output. Once an OV condition has been triggered on the main output, the supply will shut down and latch the fault condition. The latch can be unlocked by disconnecting the supply from the DC supply or by toggling the PSON_L input. The standby output will continuously try to restart with a 1 s interval after OV condition has occurred. 8.2 UNDERVOLTAGE DETECTION Both main and standby outputs are monitored. LED and PWOK_H pin signal if the output voltage exceeds 5% of its nominal voltage. The main output will latch off if the main output voltage V1 falls below 10 V (typically in an overload condition) for more than 55 ms. The latch can be unlocked by disconnecting the supply from the DC supply or by toggling the PSON_L input. If the standby output leaves its regulation bandwidth for more than 2 ms then the main output is disabled to protect the system. 8.3 CURRENT LIMITATION MAIN OUTPUT The main output exhibits a substantially rectangular output characteristic controlled by a software feedback loop. If output current exceeds IV1 OC Fast it will reduce output voltage in order to keep output current at IV1 OC Fast. If the output voltage drops below ~10.0 VDC for more than 55 ms, the output will latch off (standby remains on). The latch can be unlocked by disconnecting the supply from the DC mains or by toggling the PSON_L input. The main output current limitation thresholds depend on the actual input applied to the power supply. STANDBY OUTPUT The standby output exhibits a substantially rectangular output characteristic down to 0 V (no hiccup mode / latch off). The current limitation of the standby output is independent of the DC input voltage. Running in current limitation causes the output voltage to fall, this will trigger under voltage protection and disables the main output. 9. The power supply operating parameters can be accessed through I2C interface. For more details refer to chapter I2C / POWER MANAGEMENT BUS COMMUNICATION and document URP.00234 (PET2000-12-074 Power Management Bus Communication Manual). PARAMETER MAX UNIT Vi mon Input Voltage DESCRIPTION / CONDITION Vi min LL Vi Vi max MIN -2 NOM +2 VDC Ii mon Input Current Ii > 5.8 A -10 +10 % Pi mon True Input Power Pi > 250 W -10 +10 % V1 mon V1 Voltage -0.2 +0.2 VDC I1 mon V1 Current P1 nom V1 Output Power I1 > 50A 5 A < I1 50 A -2 +2 % -0.5 +0.5 ADC Pi > 1000 W -3 +3 % 50 W < Pi 1000 W -10 +10 W VSB mon VSB Voltage -0.2 +0.2 VDC ISB mon VSB Current -0.2 +0.2 ADC TA mon Inlet Temperature +5 C TA min TA TA max -5 2 Asia-Pacific Europe, Middle East North America +86 755 298 85888 +353 61 225 977 +1 408 785 5200 (c) 2019 Bel Power Solutions & Protection BCD.00773.0_AF1 PET2000-12-074xD 8 10. 10.1 ELECTRICAL CHARACTERISTICS PARAMETER DESCRIPTION / CONDITION MIN NOM MAX UNIT PSON_H / HOTSTANDBYEN_H PSON_L: Main output enabled VIL Input Low Level Voltage VIH Input High Level Voltage IIL,H Maximum Input Sink or Source Current Rpull up Internal Pull up Resistor to internal 3.3 V -0.2 0.8 V HOTSTANDBYEN_H: Hot Standby mode allowed 2 3.5 V VI = -0.2 V to +3.5 V -1 1 mA HOTSTANDBYEN_H: Hot Standby mode not allowed PSON_L: Main output disabled RLOW RHIGH 10 Maximum external Pull down Resistance to GND to obtain Low Level Minimum external Pull down Resistance to GND to obtain High Level k 1 50 k k PWOK_H VOL Output Low Level Voltage V1 or VSB out of regulation, VIsink < 4 mA 0 VOH Output High Level Voltage V1 and VSB in regulation, Isource < 0.5 mA 2.4 Rpull up IOL 10.2 Internal Pull up Resistor to internal 3.3 V Maximum Sink Current 0.4 3.5 1 VO < 0.4 V V V k 4 mA SENSE INPUTS The main output has sense lines implemented to compensate for voltage drop on load wires in both positive and negative path. The maximum allowed voltage drop is 200 mV on the positive rail and 100 mV on the GND rail. With open sense inputs the main output voltage will rise by 270 mV. Therefore, if not used, these inputs should be connected to the power output and GND at the power supply connector. The sense inputs are protected against short circuit. In this case the power supply will shut down. 10.3 CURRENT SHARE The PET front-ends have an active current share scheme implemented for V1. All the ISHARE current share pins need to be interconnected in order to activate the sharing function. If a supply has an internal fault or is not turned on, it will disconnect its ISHARE pin from the share bus. This will prevent dragging the output down (or up) in such cases. The current share function uses an analog bus to transmit and receive current share information. The controller implements a Master/Slave current share function. The power supply providing the largest current among the group is automatically the Master. The other supplies will operate as Slaves and increase their output current to a value close to the Master by slightly increasing their output voltage. The voltage increase is limited to +250 mV. The standby output uses a passive current share method (droop output voltage characteristic). 10.4 PSON_L INPUT The PSON_L is an internally pulled-up (3.3 V) input signal to enable/disable the main output V1 of the front-end. With low level input the main output is enabled. This active-low pin is also used to clear any latched fault condition. The PSON_L can be either controlled by an open collector device or by a voltage source. tech.support@psbel.com PET2000-12-074xD 9 PSU 1 PDU PSU 1 PDU 3.3V 3.3V PSON_L PSON_L PSU 2 PSU 2 3.3V 3.3V PSON_L PSON_L Figure 6. PSON_L connection 10.5 PWOK_H OUTPUT The PWOK_H is an open drain output with an internal pull-up to 3.3 V indicating whether both VSB and V1 outputs are within regulation. This pin is active-low. PSU PDU PSU PDU 3.3V 3.3V PWOK_H 3.3V 1k PWOK_H >10k PSU 1 PDU PSU 1 PDU 3.3V 3.3V PWOK_H 3.3V 1k PWOK_H PSU 2 PSU 2 3.3V 3.3V PWOK_H PWOK_H Figure 7. PWOK_H connection 10.6 PRESENT_L OUTPUT The PRESENT_L pin is wired through a 100 Ohms resistor to internal GND within the power supply. This pin does indicate that there is a power supply present in this system slot. An external pull-up resistor has to be added within the application. Current into PRESENT_L should not exceed 5mA to guarantee a low level voltage if power supply is seated. PSU PDU Vext PRESENT_L 100 Figure 8. PRESENT_L connection Asia-Pacific Europe, Middle East North America +86 755 298 85888 +353 61 225 977 +1 408 785 5200 (c) 2019 Bel Power Solutions & Protection BCD.00773.0_AF1 PET2000-12-074xD 10 10.7 SIGNAL TIMING DC Input DC Input tDC drop2 VSB tV1 rise VSB tV1 holdup tVSB rise tDC VSB V1 tVSB V1 del V1 tV1 off tDC drop1 PSON_L tPWOK_H holdup tDC V1 PSON_L PWOK_H tPWOK_H warn tPWOK_H del PWOK_H Figure 9. DC turn-on timing DC Input DC Input VSB Figure 10. DC short dips tVSB holdup tVSB off VSB tV1 off V1 tPWOK_H holdup PSON_L tPWOK_H warn PWOK_H Figure 11. DC long dips TDC VSB tAC V1 tVSB V1 del tV1 rise tVSB rise TDC drop1 TDC drop2 tV1 holdup tVSB holdup tPWOK_H del tPWOK_H warn tPWOK_H holdup tPWOK_H low tPSON_L V1 on tPSON_L V1 off tPSON_L PWOK_H tV1 off tVSB off 3 tV1 rise V1 tV1 off tPWOK_H low PSON_L PWOK_H tPWOK_H del tPWOK_H warn Figure 12. PSON_L turn-on/off timing DESCRIPTION / CONDITION PARAMETER tPSON_L PWOK_H tPSON V1 off tPSON_L V1 on tV1 holdup MIN NOM DC Line to 90% VSB DC Line to 90% V1 VSB to V1 delay PSON_L = Low PSON_L = Low V1 rise time VSB rise time See chapter OUTPUT DC drop from Vi = 48 VDC, without V1 leaving regulation DC drop without VSB leaving regulation Loss of DC to V1 leaving regulation Loss of DC to V1 leaving regulation 50 MAX UNIT 3 s 53 1000 s ms See chapter OUTPUT I1 nom, ISB nom 5 I1 nom, ISB nom 10 See chapter INPUT See chapter INPUT 5 6 5.5 ms ms 6 12 Outputs in regulation to PWOK_H asserted Warning time from de-assertion of PWOK_H to V1 leaving regulation Loss of DC to PWOK_H de-asserted 0.15 ms 2 ms Time PWOK_H is kept low after being de-asserted Delay PSON_L active to V1 in regulation 100 5 Delay PSON_L de-asserted to V1 disabled Delay PSON_L de-asserted to PWOK_H de-asserted 5 ms ms 400 ms 400 ms ms 4 ms ms TBD Time V1 is kept off after leaving regulation 1 s Time VSB is kept off after leaving regulation 1 s At repeated ON-OFF cycles the start-up times can be increased by 1 s tech.support@psbel.com PET2000-12-074xD 10.8 11 LED INDICATOR The front-end has one front LED showing the status of the supply. The LED is bi-colored: green and amber, and indicates DC input and DC output power presence and warning or fault conditions. Table 1 below lists the different LED status. OPERATING CONDITION 4 LED SIGNALING No Vi or DC Line in UV condition, VSB not present from paralleled power supplies Off PSON_L High Blinking Green 1 Hz No DC or ADC Line in UV condition, VSB present from paralleled power supplies V1 or VSB out of regulation Over temperature shutdown Solid Amber Output over voltage shutdown (V1 or VSB) Output over current shutdown (V1 or VSB) Fan error (>15%) Over temperature warning Blinking Amber 1 Hz Minor fan regulation error (>5%, <15%) Firmware boot loading in process Blinking Green 2 Hz Outputs V1 and VSB in regulation Solid Green Table 1. LED Status 4 The order of the criteria in the table corresponds to the testing precedence in the controller Asia-Pacific Europe, Middle East North America +86 755 298 85888 +353 61 225 977 +1 408 785 5200 (c) 2019 Bel Power Solutions & Protection BCD.00773.0_AF1 PET2000-12-074xD 12 11. The PET front-end is a communication Slave device only; it never initiates messages on the I2C/SMBus by itself. The communication bus voltage and timing is defined in Table 2 and further characterized through: 3.3V * * The SDA/SCL IOs use 3.3 V logic levels External pull-up resistors on SDA/SCL required for correct signal edges Full SMBus clock speed of 100 kbps Clock stretching limited to 1 ms SCL low time-out of >25 ms with recovery within 10 ms Recognizes any time Start/Stop bus conditions * * * * 3.3/5V RX TX_EN 10k Rpull-up TX SDA/SCL DSP or EEPROM Figure 13. Physical Layer of Communication Interface Communication to the DSP or the EEPROM will be possible as long as the input DC voltage is provided. If no DC is present, communication to the unit is possible as long as it is connected to a life VSB output (provided e.g. by the redundant unit). If only V1 is provided, communication is not possible. PARAMETER DESCRIPTION CONDITION MIN MAX UNIT -0.5 1.0 V 3.5 V SCL / SDA ViL Input low voltage ViH Input high voltage 2.3 Vhys Input hysteresis 0.15 VoL Output low voltage tr Rise time for SDA and SCL tof Output fall time ViHmin ViLmax 10 pF < Cb1 < 400 pF Ii Input current SCL/SDA 0.1 VDD < Vi < 0.9 VDD Ci Internal Capacitance for each SCL/SDA fSCL SCL clock frequency Rpull-up External pull-up resistor fSCL 100 kHz tHDSTA Hold time (repeated) START fSCL 100 kHz 4.0 s tLOW Low period of the SCL clock fSCL 100 kHz 4.7 s tHIGH High period of the SCL clock fSCL 100 kHz 4.0 s tSUSTA Setup time for a repeated START fSCL 100 kHz 4.7 tHDDAT Data hold time fSCL 100 kHz 0 tSUDAT Data setup time fSCL 100 kHz 250 ns tSUSTO Setup time for STOP condition fSCL 100 kHz 4.0 s tBUF Bus free time between STOP and START fSCL 100 kHz 5 ms 1 3 mA sink current V 0 0.4 V 20+0.1Cb1 300 ns 20+0.1Cb1 250 ns -10 10 A 50 pF 0 100 kHz 1000 ns / Cb1 s 3.45 s Cb = Capacitance of bus line in pF, typically in the range of 10...400 pF Table 2. I2C / SMBus Specification tof tLOW tHIGH tLOW tr SCL tSUSTA tHDSTA tHDDAT tSUDAT tSUSTO tBUF SDA Figure 14. I2C / SMBus Timing tech.support@psbel.com PET2000-12-074xD 13 ADDRESS SELECTION The address for I2C communication can be configured by pulling address input pins A1 and A0 either to GND (Logic Low) or leave them open (Logic High). An internal pull up resistor will cause the A0/A1 and A3 pin to be in High Level if left open. A fixed addressing offset exists between the Controller and the EEPROM. 1) 2) A2 2) A1 A0 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 I2C Address 1) Controller EEPROM 0xB0 0xB2 0xB4 0xB6 0xB8 0xBA 0xBC 0xBE 0xA0 0xA2 0xA4 0xA6 0xA8 0xAA 0xAC 0xAE The LSB of the address byte is the R/W bit. A2 is used on the standard model only. On special models (e.g. PET2000-12-074ND020) the connector PIN is used for IN_OK functionality. These models have only two addressing pins A0 and A1. A2 is set to 0 inside firmware by default. Table 3. Address and Protocol Encoding 11.1 SMBALERT_L OUTPUT The SMBALERT_L signal indicates that the power supply is experiencing a problem that the system agent should investigate. This is a logical OR of the Shutdown and Warning events. It is asserted (pulled Low) at Shutdown or Warning events such as reaching temperature warning/shutdown threshold of critical component, general failure, over-current, over-voltage, undervoltage or low-speed of failed fan. This signal may also indicate the power supply is operating in an environment exceeding the specified limits. The SMBAlert signal is asserted simultaneously with the LED turning to solid amber or blinking amber. PARAMETER SMB_ALERT_L Vext Maximum External Pull up Voltage IOH Maximum High Level Leakage Current VOL Output Low Level Voltage Rpull up Internal Pull up Resistor to internal 3.3 V IOL Maximum Sink Current DESCRIPTION / CONDITION MIN No Failure or Warning condition, VO = 12 V Failure or Warning condition, Isink < 4 mA NOM 0 MAX UNIT 12 V 10 0.4 A V 4 mA None VO < 0.4 V PSU 1 PDU SMBALERT_L 3.3V 1k PSU 2 SMBALERT_L Figure 15. SMBALERT_L connection Asia-Pacific Europe, Middle East North America +86 755 298 85888 +353 61 225 977 +1 408 785 5200 (c) 2019 Bel Power Solutions & Protection BCD.00773.0_AF1 PET2000-12-074xD 14 11.2 CONTROLLER AND EEPROM ACCESS The controller and the EEPROM in the power supply share the same I2C bus physical layer (see Figure 16) and can be accessed under different addresses, see ADDRESS SELECTION. The SDA/SCL lines are connected directly to the controller and EEPROM which are supplied by internal 3.3 V. The EEPROM provides 256 bytes of user memory. None of the bytes are used for the operation of the power supply. A2..0 Address Selection SDA DSP SCL Protection EEPROM Figure 16. I2C Bus to DSP and EEPROM 11.3 EEPROM PROTOCOL The EEPROM follows the industry communication protocols used for this type of device. Even though page write / read commands are defined, it is recommended to use the single byte write / read commands. WRITE The write command follows the "SMBus 1.1 Write Byte Protocol". After the device address with the write bit cleared, the Two Byte Data Address is sent followed by the data byte and the STOP condition. A new START condition on the bus should only occur after 5ms of the last STOP condition to allow the EEPROM to write the data into its memory. READ The read command follows the "SMBus 1.1 Read Byte Protocol". After the device address with the write bit cleared the two byte data address is sent followed by a repeated start, the device address and the read bit set. The EEPROM will respond with the data byte at the specified location. tech.support@psbel.com PET2000-12-074xD 11.4 15 POWER MANAGEMENT BUS PROTOCOL The Power Management Bus is an open standard protocol that defines means of communicating with power conversion and other devices. For more information, please see the System Management Interface Forum web site at: www.powerSIG.org. Power Management Bus command codes are not register addresses. They describe a specific command to be executed. The PET2000-12-074ND supply supports the following basic command structures: * Clock stretching limited to 1 ms * SCL low time-out of >25 ms with recovery within 10 ms * Recognized any time Start/Stop bus conditions WRITE The write protocol is the SMBus 1.1 Write Byte/Word protocol. Note that the write protocol may end after the command byte or after the first data byte (Byte command) or then after sending 2 data bytes (Word command). S Address W A Data Low Byte1) A 1) Command A Data High Byte1) A P Optional In addition, Block write commands are supported with a total maximum length of 255 bytes. See PET2000-12-074NA / PET2000-12-074ND Power Management Bus Communication Manual URP.00234 for further information. S Address W A Byte 1 Command A A Byte Count A Byte N A P READ The read protocol is the SMBus 1.1 Read Byte/Word protocol. Note that the read protocol may request a single byte or word. S Address W A S Address R 1) A Command A Data (Low) Byte A Data High Byte1) nA P Optional In addition, Block read commands are supported with a total maximum length of 255 bytes. See PET2000-12-074NA/ PET2000-12-074ND Power Management Bus Communication Manual URP.00234 for further information. S Address W A Byte Count A Command Byte 1 A A S Address R Byte N A nA P Asia-Pacific Europe, Middle East North America +86 755 298 85888 +353 61 225 977 +1 408 785 5200 (c) 2019 Bel Power Solutions & Protection BCD.00773.0_AF1 PET2000-12-074xD 16 11.5 GRAPHICAL USER INTERFACE The Bel Power Solutions provides with its "I2C Utility" a Windows(R) XP/Vista/Win7 compatible graphical user interface allowing the programming and monitoring of the PET2000-12-074xD Front-End. The utility can be downloaded on: www.belpowersolution.com and supports both the PSMI and Power Management Bus protocols. The GUI allows automatic discovery of the units connected to the communication bus and will show them in the navigation tree. In the monitoring view the power supply can be controlled and monitored. If the GUI is used in conjunction with the YTM.00046 Evaluation Board it is also possible to control the PSON_L pin(s) of the power supply. Further there is a button to disable the internal fan for approximately 10 seconds. This allows the user to take input power measurements without fan consumptions to check efficiency compliance to the Climate Saver Computing Platinum specification. The monitoring screen also allows to enable the hot-standby mode on the power supply. The mode status is monitored and by changing the load current it can be monitored when the power supply is being disabled for further energy savings. This obviously requires 2 power supplies being operated as a redundant system (as in the evaluation kit). NOTE: The user of the GUI needs to ensure that only one of the power supplies have the hot-standby mode enabled. Figure 17. Monitoring dialog of the I2C Utility 12. To achieve best cooling results sufficient airflow through the supply must be ensured. Do not block or obstruct the airflow at the rear of the supply by placing large objects directly at the output connector. The PET2000-12-074ND is provided with a rear to front airflow, which means the air enters through the DC-output of the supply and leaves at the DC-inlet. The PET2000-12-074RD is provided with a front to rear airflow, which means the air enters through the DC-input of the supply and leaves at the DC-output. The PET2000-12-074xD power supply has been designed for horizontal operation. tech.support@psbel.com PET2000-12-074xD 17 Airflow Figure 18. Airflow direction PET2000-12-074ND Airflow Figure 19. Airflow direction PET2000-12-074RD The fan inside of the supply is controlled by a microprocessor. The rpm of the fan is adjusted to ensure optimal supply cooling and is a function of output power and the inlet temperature. Figure 20 illustrates the programmed fan curves. Figure 20. Fan speed vs. main output load The PET2000-12-074ND provides access via I2C to the measured temperatures of sensors within the power supply, see Table 4. The microprocessor is monitoring these temperatures and if warning threshold of one of these sensors is reached it will set fan to maximum speed. If temperatures continue to rise above shut down threshold the main output V1 (or VSB if auxiliary converter is affected) will be disabled. At the same time, the warning or fault condition is signalized accordingly through LED, PWOK_H and SMBALERT_L. TEMPERATURE SENSOR Inlet Air Temperature Synchronous Rectifier Primary Heat Sink POWER MANAGEMENT BUS REGISTER DESCRIPTION / CONDITION PET2000-12-074ND Sensor located on control board close to DC end of power supply (card edge connector) PET2000-12-074RD Sensor located next to the fan of power supply Sensor located on secondary side of DC/DC stage Sensor located next to the heat sink WARNING THRESHOLD SHUT DOWN THRESHOLD 77C 80C 67C 70C 0xD6 95C 105C 0x8E 95C 105C Ox8D Table 4. Temperature sensor location and thresholds Asia-Pacific Europe, Middle East North America +86 755 298 85888 +353 61 225 977 +1 408 785 5200 (c) 2019 Bel Power Solutions & Protection BCD.00773.0_AF1 PET2000-12-074xD 18 13. For safety compliant operation the power supply needs to be operating inside the specified operating conditions. The PET2000-12-074xD modules have different power derating behavior which are mainly dependent on the air flow direction and the ambient conditions. PET2000-12-074ND Between 0C and 55C power supply is only depending on AC input altitude. Above 55C the maximum output power is further reduced with rising temperature. Figure 21 illustrates these maximum current and power levels. Figure 21. Maximum current and power levels PET2000-12-074ND PET2000-12-074RD Between 0C and 40C power supply is only depending on AC input altitude. Above 40C the maximum output power is further reduced with rising temperature. Figure 22 illustrates these maximum current and power levels. PET2000-12-074RD PET2000-12-074RD 167 140 Main output power [W] Main output current [A] 160 150 120 100 100 80 60 40 20 0 0 35 40 45 50 55 Ambient Temperature [C] 60 2000 1800 1600 1400 1200 1000 800 600 400 200 0 2000 1800 1200 0 30 35 40 45 50 Ambient Temperature [C] 55 60 Figure 22. Maximum current and power levels PET2000-12-074RD tech.support@psbel.com PET2000-12-074xD 19 14. 14.1 IMMUNITY PARAMETER ESD Contact Discharge ESD Air Discharge Radiated Electromagnetics Filed Burst Surge RF Conducted Immunity DESCRIPTION / CONDITION CRITERION IEC / EN 61000-4-2, 8 kV, 25+25 discharges per test point (metallic case, LED, connector body) IEC / EN 61000-4-2, 15 kV, 25+25 discharges per test point (non-metallic user accessible surfaces) IEC / EN 61000-4-3, 10 V/m, 1 kHz/80% Amplitude Modulation, 1s Pulse Modulation, 10 kHz ... 2 GHz IEC / EN 61000-4-4, Level 3 DC input port 2 kV, 1 minute IEC / EN 61000-4-5 ; NEBS GR-1089-CORE Issue 6 Common mode: 1 kV (2 Ohm) Differential mode : 1 kV (2 Ohm) A A A A A IEC / EN 61000-4-6, Level 3, 10 Vrms, CW, 0.1 ... 80 MHz A 14.2 EMISSION PARAMETER Conducted Emission Radiated Emission Acoustical Noise DESCRIPTION / CONDITION CRITERION EN 55022 / CISPR 22: 0.15 ... 30 MHz, QP and AVG, single power supply EN 55022 / CISPR 22: 30 MHz ... 1 GHz, QP, single power supply Class A - 6 dB Class A - 6 dB Distance at bystander position, 25C, 50% Load 65 dBA 15. Maximum electric strength testing is performed in the factory according to IEC/EN 60950, and UL 60950. Input-to-output electric strength tests should not be repeated in the field. Bel Power Solutions will not honor any warranty claims resulting from electric strength field tests. PARAMETER DESCRIPTION / CONDITION NOTE Agency Approvals UL 60950-1 2nd Edition CAN/CSA-C22.2 No. 60950-1-07 2nd Edition IEC 60950-1: 2005 EN 62368-1: 2014 EN 60950-1: 2006 EN 62368-1: 2014 NEMKO EAC CQC GB4943.1-2011 TR TC 004/2011 Approved Input plus to chassis; 1414V for 1 minute Basic Input minus to chassis; 1414V for 1 minute Basic Output to chassis None (Direct connection) Isolation Strength Primary to chassis (PE) Creepage / Clearance >2 mm Primary to secondary Asia-Pacific Europe, Middle East North America +86 755 298 85888 +353 61 225 977 +1 408 785 5200 (c) 2019 Bel Power Solutions & Protection BCD.00773.0_AF1 PET2000-12-074xD 20 16. PARAMETER TA TAext TS Ambient Temperature Extended Temp. Range Storage Temperature DESCRIPTION / CONDITION MIN Up to 1'000m ASL, PET2000-12-074ND Up to 1'000m ASL, PET2000-12-074RD Linear derating from 1'000 to 3'048 m ASL PET2000-12-074ND PET2000-12-074RD PET2000-12-074ND PET2000-12-074RD -5 -5 Non-operational NOM MAX UNIT +55 +40 C C +45 +30 70 55 C C C C -20 +70 C Operational, above Sea Level - 3'048 m Non-operational, above Sea Level - 10'600 m 1 g peak 30 g peak 1 g peak Altitude Shock, operational Shock, non-operational Vibration, sinusoidal, operational Half sine, 11ms, 10 shocks per direction, 6 directions Vibration, sinusoidal, non-operational IEC/EN 60068-2-6, sweep 5 to 500 to 5 Hz, 1 octave/min, 5 sweep per axis Vibration, random, operational 7.7grms 30min, 3 axes operational Vibration, random, non-operational IEC/EN 60068-2-64, 5 to 500 Hz, 1 hour per axis 4 g peak 7.7 Grms 0.025 g2/Hz 17. PARAMETER DESCRIPTION / CONDITION MIN MTBF According Bellcore TR-TSY-000332, Issue 3 TA = 25C, Vi = 48 VDC, 0.5 I1 nom, ISB nom 683 Mean time to failure TA = 25C, Vi = 48 VDC, 0.7 I1 nom, ISB nom 7 TA = 55C, Vi = 48 VDC, I1 nom, ISB nom 2 NOM MAX UNIT kh Expected life time years 18. PARAMETER Dimensions * m Weight DESCRIPTION / CONDITION MIN NOM MAX UNIT Width 73.5 mm Heigth 40.0 mm Depth 265.0 mm 1.2 kg * Dimensions in mm, tolerances acc. ISO 2768 ()-H, unless otherwise stated: 0.5-30: 0.2; 30-120: 0.3; 120-400: 0.5 tech.support@psbel.com PET2000-12-074xD 21 Figure 23. Top and side view with the connector added V1 Power supply rear view GND I2C VSB Card edge PCB within power supply GND Digital I/O Analog I/O S13 S24 P19 S12 S1 P18 P28 P29 P11 P10 P36 P1 Reserved Mating connector, soldered onto application backplane S12 S1 P18 P1 S24 P19 P36 S13 Application backplane, top view Figure 25. Rear view Figure 24. Front view A screw added on the PET2000-12-074xD side prevents the unit from being inserted into system with standard INTEL connector. Systems using PET2000-12-074xD must have a slot of o6 mm x 14 mm implemented to allow the unit to be inserted. The maximum size of the screw head is o6mm and height 2.12 mm. Asia-Pacific Europe, Middle East North America +86 755 298 85888 +353 61 225 977 +1 408 785 5200 (c) 2019 Bel Power Solutions & Protection BCD.00773.0_AF1 PET2000-12-074xD 22 Figure 26. Polarizing screw 19. PARAMETER DESCRIPTION / CONDITION DC inlet Receptacle: Amphenol # C10-730138-000, 3.6 mm Plug: Amphenol # C10-747100-000, for 6 AWG (black) Amphenol # C10-638974-000, for 6 AWG (gray) Amphenol # C10-747442-000, for 4 AWG (black) Input wire harness (with black plug): Amphenol # CR-302001-257 MIN DC diameter requirement Wire size Output connector 25-Pin PCB card edge 6 NOM MAX UNIT 4 AWG Manufacturer: FCI Electronics Mating output connector Manufacturer P/N: 10130248-005LF (see Figure 27 for option x) BEL P/N: ZES.00678 PIN SIGNAL NAME P1 ~ P10 P29 ~ P36 GND GND P11 ~ P18 P19 ~ P28 V1 V1 S1 A0 S2 S3, S4, S21, S22 S5 S6 A1 VSB NC ISHARE DESCRIPTION Power and signal ground (return) +12 VDC main output I2C address selection input +12 V Standby positive output Not used Analog current share bus S7 Reserved For future use, keep open circuit S8 PRESENT_L A2 or IN_OK GND PWOK_H Power supply seated, active-low I2C address selection input (on standard models) or Input voltage OK signal output, active-high (e.g. For PET2000-12-074ND0200) Power and signal ground (return) Power OK signal output, active-high S17 V1_SENSE Main output positive sense S18 S19 V1_SENSE_R SMB_ALERT_L Main output negative sense SMB Alert signal output, active-low S20 S23 PSON_L SCL Power supply on input, active-low I2C clock signal line S24 SDA S9 S10 ~ S15 S16 I2C data signal line Table 5. Output connector pin assignment tech.support@psbel.com PET2000-12-074xD 23 Figure 27. Mating connector drawing page 1 Asia-Pacific Europe, Middle East North America +86 755 298 85888 +353 61 225 977 +1 408 785 5200 (c) 2019 Bel Power Solutions & Protection BCD.00773.0_AF1 24 PET2000-12-074xD Figure 28. Mating connector drawing page 2 tech.support@psbel.com PET2000-12-074xD 25 Figure 29. Mating connector drawing page 3 Asia-Pacific Europe, Middle East North America +86 755 298 85888 +353 61 225 977 +1 408 785 5200 (c) 2019 Bel Power Solutions & Protection BCD.00773.0_AF1 PET2000-12-074xD 26 20. ITEM ORDERING PART NUMBER SOURCE I2C Utility Windows XP/Vista/7 compatible GUI to program, control and monitor Front-End power supplies (and other I2C units) ZS-00130 belfuse.com/power-solutions Evaluation Board Connector board to operate PET2000-12-074NA and PET2000-12-074ND. Includes an on-board USB to I2C converter (use I2C Utility as desktop software). YTM.00046 belfuse.com/power-solutions DESCRIPTION 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. tech.support@psbel.com