PET800-12-074ND

PET800-12-074XD BEL | Alldatasheet

Document overview

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Technical content

The PET800-12-074xD is an 800 Watt DC to DC power supply that converts -40 to -72 VDC voltage into an insulated main output of +12 VDC for powering intermediate bus architectures (IBA) in high performance and reliability servers, routers, and netw ork switches. The PET800-12-074xD utilizes digital control architecture for greater efficiency, control and functionality. This power supply meets international safety standards and displays the CE-Mark for the European Low Voltage Directive (LVD).

• High Efficiency to 94% at 50% load
• Wide input voltage range: -40 to -72 VDC
• Always-On 24 W Standby Output (12 V/2 A)
• Hot-plug capable
• Parallel operation with active current sharing
• Digital controls for improved performance
• High density design: 25 W/in3
• Small Form Factor 73.5 x 39.0 x 185 mm
• PMBus® for Control, Programming and Monitoring
• Over temperature, output over voltage and over current protection
• One DC OK Signaling Status LED
• Networking Switches
• High Performance Servers
• Routers Disclaimer: PMBus is a registered trademark of SMIF, Inc.

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stresses, thus providing increased system reliability and high efficiency. high availability applications. The supply is fan cooled and ideally suited for integration with a matching airflow path. active OR-ing device for maximum reliability. power demand and supply temperature and can be overridden through the I2C bus. Figure 1. Block Diagram and cause permanent damage to the supply.

General Condition: TA = 0… 50 °C unless otherwise noted.

4.1 INPUT FUSE

are not accessible from the outside and are therefore not serviceable parts.

4.2 INRUSH CURRENT

control is managed by the digital controller (DSP).

4.3 INPUT UNDER-VOLTAGE

the input voltage returns within the normal operating range, the supply will return to normal operation again.

4.4 EFFICIENCY

The power supply module efficiency curve is measured at -48 VDC and with external fan power as below. Figure 2. Efficiency Curve (To be updated)

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tech.support@psbel.com PARAMETER DESCRIPTION / CONDITION MIN NOM MAX UNIT Main Output V1 V1 nom Nominal Output Voltage 0.5 ∙ I1 nom, TA = 25°C

12.0 VDC

V1 set Output Set Point Accuracy -0.5 +0.5 %V1 nom dV1 tot Total Static Regulation Vi min to Vi max, 0 to 100% I1 nom, TA = 0 to 40°C -5 +5 %V1 nom P1 nom Nominal output power Vi min to Vi max, TA = 0 to 50°C 780 W I1 nom Output Current Vi min to Vi max,, TA = 0 to 50°C 65 ADC V1 pp Output Ripple Voltage1 Vi min to Vi max, 0 to 100% I1 nom, 20 Mhz Bandwidth 150 mVpp dV1 temp Thermal Drift Vi nom HL, 0.5 ∙ I1 nom 0.05 %/°C dI1 share Current Sharing Deviation from I1 tot / N, I1 > 10% -6.5 +6.5 ADC VISHARE Current Share Bus Voltage I1 peak 6 VDC dV1 lt Load Transient Response ΔI1 = 50% I1 nom, I1 = 10 … 100% I1 nom, Cext = 0 mF, dI1/dt = 1 A/μs, recovery within 1% of V1 nom -5 5 % V1 nom trec Recovery Time 2 ms tV1 on delay Delay time from DC applied V1 in regulation Vi = 0V to Vi min , Vi nom, Vi max 2.5 sec tV1 ovr sh Output Turn-on Overshoot Vi nom , 0 to 100% I1 nom 10 %V1 nom dV1 sense Remote Sense Compensation for cable drop, 0 to 100% I1 nom 0.25 V CV1 load Capacitive Loading 11000 µF Standby Output VSB VSB nom Nominal Output Voltage ISB =1A (50% of ISBnom),TA = 25°C

12 VDC

VSB set Output Setpoint Accuracy -1 +1 %VSBnom dVSB tot Total Regulation Vi min to Vi max, 0 to 100% ISB nom -5 +5 %VSBnom PSB nom Nominal output power Vi min to Vi max, TA = 0 to 50°C 24 W ISB nom Output Current Vi min to Vi max, TA = 0 to 50°C 2 ADC VSB pp Output Ripple Voltage Vi min to Vi max, 0 to 100% ISB nom, Cext = 0Mf, 20 Mhz bandwidth 120 mVpp tVSB ovr sh Output Turn-on Overshoot Vi nom , 0 to 100% ISB nom 10 %Vsb dVSB Load Transient Response ΔISB = 50% ISB nom, ISB = 10… 100% ISB nom, dISB/dt = 0.5A/μs, recovery within regulation of VSB nom -5 +5 %Vsb trec Recovery Time 250 µs CVSB load Capacitive Loading 350 µF 1 The output noise and ripple measurement was made with 20 MHz bandwidth using a 6 inch twisted pair, terminated with a 10 µF tantalum capacitor in parallel with a 0.1 µF ceramic capacitor. The output ripple voltage on VSB is influenced by the main output V1. Evaluating VSB output ripple must be done when maximum load is applied to V1 General Condition: TA = 0…50 °C unless otherwise noted.

5.1 OUTPUT GROUND / CHASSIS CONNECTION

planes should be connected together at the power supplies ground pins. passing the max allowed Common Mode Noise levels. Figure 3. Common low impedance ground plane Figure 4. Separated power and signal ground

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6.1 OVERVOLTAGE PROTECTION

6.2 UNDERVOLTAGE DETECTION

when VSB voltage higher than 10 V.

6.3 CURRENT LIMITATION

current limitation and its voltage drops below ~10.8 VDC for more than 10 ms, the output will latch off (standby remains on). Figure 5. Current Limitation on V1 (Vi = -54 VDC) current trip point. The latch can be unlocked by disconnecting the supply from the DC mains or by toggling the PS_ON input. Limitation and its output voltage drops below the UV threshold, then the main output will be inhibited. Figure 6. Current limitation on VSB

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tech.support@psbel.com The power supply operating parameters can be accessed through I2C interface. For more details refer to chapter 10. I2C / PMBus® COMMUNICATION and document URP.xxxxx (PET800-12-074xD PMBus® Communication Manual). PARAMETER DESCRIPTION / CONDITION MIN NOM MAX UNIT Vi mon Input Voltage Vi min LL ≤ Vi ≤ Vi max -5 +5 % Ii mon Input Current Ii >7 A -10 +10 % Pi mon True Input Power Pi > 350 W -10 +10 % V1 mon V1 Voltage -2 +2 % I1 mon V1 Current I1 > 10 A TBD TBD % I1 ≤ 10 A TBD TBD ADC P1 nom V1 Output Power P1 > 200 W TBD TBD % P1 ≤ 200 W TBD TBD W VSB mon VSB Voltage -2 +2 % ISB mon VSB Current -0.5 +0.5 ADC PARAMETER DESCRIPTION / CONDITION MIN NOM MAX UNIT PS ON# Signal Characteristics Signal type (Active Low) Accepts an open collector/drain input from the system. Pul-up to Vsb located in the power supply. PSON = Low ON PSON= Open or High OFF PSON = Low OFF Logic level low power supply ON 0 1.0 V Logic level high power supply OFF 2.0 5.25 V Source current Vpson = low 4 mA Power up delay T pson on delay 5 400 ms PWOK delay T pson pwok 50 ms PWOK Signal Characteristics Signal type Open collector/drain output from power supply. Pull-up to Vsb located in power supply. PWOK = High Power Good PWOK = Low Power Not Good Logic level low voltage Isink = 4 mA 0 0.4 V Logical level high voltage Isource = 200 µA 2.4 5.25 V Sink current PWOK = low 4 mA Source current, PWOK = high 2 mA PWOK delay Tpwok on 100 500 ms PWOK rise and fall time 100 µs Power down delay Tpwok off 1 200 ms SMB Alert Signal Characteristics Signal Type Open collector/drain output from power supply. Pull-up to Vsb located in power supply. Alert = High Power OK Alert = Low Power Alert to system Logic level low voltage Isink = 4 mA 0 0.4 V Logic level high voltage Isink = 50 µA 2.4 3.46 V Sink current Alert = low - 4 mA Sink current Alert = high 50 µA NOTE: Signals that can be defined as low true use the following convention: Signal = low true.

9.1 ELECTRICAL CHARACTERISTICS

9.2 INTERFACING WITH SIGNALS

an open collector/drain to prevent back feeding inputs when the power supply is switched off. not affected by an unpowered power supply.

9.3 LED Indicator

Status information is indicated by front-panel LED, LED is bi-colored: green and yellow. See Table 1 for different LED status.

9.4 PS_ON INPUT

The PS_ON 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 c ondition. The PS_ON can be either controlled by an open collector device or by a voltage source. Figure 11. PS_ON Connection

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9.5 PWOK OUTPUT

of the PWOK delay time shall inhibited as long as any power supply output is in current limit. Figure 12. PWOK Connection

9.6 SMB ALERT OUTPUT

of life or is operating in an environment exceeding the specified limits.

9.6.1 THERMAL CLST

Figure 13. SMBALERT_L connection

9.7 PDB_ALERT

The PDB_ALERT is received signal from system, if signal is pulled low, the unit internal fan will be forced to run at max. speed.

9.8 PDB_FAULT

The PDB_FAULT receive a signal from system or PSU backplane. Power shall be shut down if this signal is high.

9.9 CURRENT SHARE

All outputs shall be capable of operating in a redundant current share mode. Eight power supplies may be operated in parallel. be of high reliability and shall be de-rated sufficiently to minimize failures. The +12 V current sharing shall be a single wire type. tied together, the output load current shall be balanced as defined below. The load share (ISHARE) shall be a single wire type. voltage shall be 6 V for a single power supply. The standby output uses a passive current share method (droop output voltage characteristic).

9.10 REMOTE SENSE

path. The maximum allowed voltage drop is 200 mV on the positive rail and 200 mV on the GND rail. the power supply will shut down. is a logical OR of the Shutdown and Warning events. communication to the unit is possible as long as it is connected to a life V1 output (provided e.g. by the redundant unit).

• There are 10K internal pull-up resistors
• The SDA/SCL IOs are 3.3/5 V tolerant
• 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

Figure 14. Physical layer of communication interface

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2 Cb = Capacitance of bus line in pF, typically in the range of 10…400 pF

Table 2. I2C / SMBus Specification Figure 15. I2C / SMBus Timing

3 A2 will be implemented in future

4 The LSB of the address byte is the R/W bit. Table 3. Address and protocol encoding

10.1 ADDRESS SELECTION

open. A fixed addressing offset exists between the Controller and the EEPROM.

10.2 CONTROLLER AND EEPROM ACCESS

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. Figure 16. I2C Bus to DSP and EEPROM

10.3 EEPROM PROTOCOL

commands are defined, it is recommended to use the single byte write / read commands. on the bus should only occur after 5ms of the last STOP condition to allow the EEPROM to write the data into its memory.

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tech.support@psbel.com READ The read command follows the SMBus 1.1 Read Byte protocol. After the device address with the write bit cleared the data address byte 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.

9.3 PMBus® PROTOCOL

The Power Management Bus ( PMBus®) 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. PMBus® command codes are not register addresses. They describe a specific command to be executed. The PET800-12-074xD 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). In addition, Block write commands are supported with a total maximum length of 255 bytes. See PET800-12-074xD PMBus® Communication Manual URP.xxxxx for further information. 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. In addition, Block read commands are supported with a total maximum length of 255 bytes. See PET800-12-074xD PMBus® Communication Manual URP.xxxxx for further information. Data nA P S Address W A Data Address A S Address R A S Address W A Command A Data Low Byte1) A Data High Byte1) A P 1) Optional S Address W A Command A Byte 1 A Byte N A P Byte Count A S Address W A Command A Data (Low) Byte AS Address R A Data High Byte1) nA P 1) Optional S Address W A Command A Byte 1 A S Address R A Byte N nA PByte Count A

to front airflow, which means the air enters through the DC-output of the supply and leaves at the DC-inlet. The PET800-12-074xD power supply has been designed for horizontal operation. and is a function of output power and the inlet temperature. Table 4. The microprocessor is monitoring these temperatures and if warning threshold of one of these sensors is reached it will

9.4 GRAPHICAL USER INTERFACE

belfuse.com/power-solutions and supports both the PSMI and PMBus® protocols. tree. In the monitoring view the power supply can be controlled and monitored. Figure 17. Monitoring dialog of the I2C Utility

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Table 4. Temperature sensor location and thresholds Figure 18. Airflow direction PET800-12-074ND

12.2 EMISSION

12.1 IMMUNITY

+86 755 298 85888 Europe, Middle East +353 61 225 977 North America +1 408 785 5200 © 2018 Bel Power Solutions & Protection BCD.00946_001 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 60950-1: 2006 NEMKO TBD Isolation Strength Input plus to chassis; 1414 V for 1 minute Basic Input minus to chassis; 1414 V for 1 minute Basic Output to chassis Function Creepage / Clearance Primary to chassis (PE) Primary to secondary >2 mm PARAMETER DESCRIPTION / CONDITION MIN NOM MAX UNIT TA Ambient Temperature Up to 1’000 m ASL 0 +50 °C Linear derating from 1’000 to 3’048 m ASL +40 °C TAext Extended Temp. Range 65 °C TS Storage Temperature Non-operational -20 +70 °C Altitude Operational, above Sea Level - 3’048 m Non-operational, above Sea Level - 10’600 m Shock, operational Half sine, 11ms, 10 shocks per direction, 6 directions 1 g peak Shock, non-operational 30 g peak Vibration, sinusoidal, operational IEC/EN 60068-2-6, sweep 5 to 500 to 5 Hz, 1 octave/min, 5 sweeps per axis 1 g peak Vibration, sinusoidal, non-operational 4 g peak Vibration, random, non-operational IEC/EN 60068-2-64, 5 to 500 Hz, 1 hour per axis 0.025 g2/Hz Acoustical Noise Distance 1 meter, 25°C, 50% Load 46 dBA PARAMETER DESCRIPTION / CONDITION MIN NOM MAX UNIT MTBF Mean time to failure According Telcordia SR-332; Ground Benign TA = 25°C, Vi = -48 VDC, 0.5 ∙ I1 nom, ISB nom 300 kh Expected life time TA = 25°C, Vi = -48 VDC, 0.7 ∙ I1 nom, ISB nom 5 years PARAMETER DESCRIPTION / CONDITION MIN NOM MAX UNIT Dimensions Width 73.4 mm Heigth 39 mm Depth 185 mm m Weight 900 g 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.

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Figure 19. Top and side view with the connector added (TBD) Figure 20. Front View Figure 21. Rear View For the pin assignment of DC connector, please refer to Figure 23 and Table 4.

A25 PWOK Power Good Output. Signal is pulled HIGH to indicate all outputs ok. internal fan shall be forced to run at maximum speed to improve thermal performance. Table 5. Output Pin Assignment Figure 22. Pin Assignment of DC Output Connector (PCB card edge)

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tech.support@psbel.com ITEM DESCRIPTION ORDERING PART NUMBER SOURCE BPS I2C Utility Windows XP/Vista/7 compatible GUI to program, control and monitor PET Front- Ends (and other I2C units) Download belfuse.com/power-solutions Dual Connector Board Connector board to operate 2 PET units in parallel. Includes an on-board USB to I2C converter (use I2C Utility as desktop software). VRA.00334.0 belfuse.com/power-solutions Loading Board USB to I2C

+86 755 298 85888 Europe, Middle East +353 61 225 977 North America +1 408 785 5200 © 2018 Bel Power Solutions & Protection BCD.00946_001 DATE REVISION ISSUE PREPARED BY APPROVED BY 2018/03/21 Preliminary Initial release Zhiqun Wan Mike Chen 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.