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The PET750-12-050 Is a 759 Watts, 1U Form Factor Power Supply Module with Active PFC (Power Factor Correction)

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The PET750-12-050 Is a 759 Watts, 1U Form Factor Power Supply Module with Active PFC (Power Factor Correction) The PET750-12-050 is a 759 Watts, 1U form factor power supply module with Active PFC (Power Factor Correction). It converts standard AC mains power into a main output of 12V for powering intermediate bus architectures (IBA) in high performance and reliability servers, routers, and network switches. The PET750-12-050 meets international safety standards and displays the CE-Mark for the European Low Voltage Directive (LVD). • Best-in-Class, 80 PLUS Certified “Platinum” Efficiency • Wide Input Voltage Range 90-264 VAC • AC Input with Power Factor Correction • Always-On 15 W Standby Output (5 V/3 A) • Hot-Plug Capability • Parallel Operation with Active Current Sharing • DC-DC Digital Controls for Improved Performance • High Density Design 20.5 W/in3 • Small Form Factor 300 x 50.5 x 40 mm (11.81 x 1.99 x 1.57 in) • Power Management Bus Communications Protocol 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 2 PET750-12-050xA PET 750 - 12 - 050 x A Product Family Power Level Dash V1 Output Dash Width Airflow Input N: Normal PET Front-Ends 750 W 12 V 50 mm A: AC R: Reverse OUTPUT MAX LOAD MAX LOAD MINIMUM RIPPLE & TOTAL MODEL CONNECTOR VOLTAGE CONVECTION 1 300 LFM 1,2 LOAD NOISE 3 REGULATION PET750-12-050NA 12 VDC 62 A 62 A 0 A 1% Card edger ± 2.5% PET750-12-050RA 12 VDC 62 A 62 A 0 A 1% Card edger ± 2.5% The PET750-12-050 AC-DC power supply is a mainly DSP controlled, highly efficient front-end. It incorporates resonance-soft- switching technology and interleaved power trains to reduce component stresses, providing increased system reliability and very high efficiency. With a wide input operating voltage range. PET750-12-050 maximizes power availability in demanding server, network switch, and router applications. The front-end is fan cooled and ideally suited for server integration with a matching airflow path. The PFC stage is controlled using interleaved Critical mode to guarantee best efficiency and unity power factor over a wide operating range. The DC-DC stage uses soft switching resonant technology in conjunction with synchronous rectification. 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 front-panel LED. In addition, the power supply can be controlled and the fan speed set via the I2C bus. It 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. NOTE: Output GND is connected to chassis in power supply. Figure 1. PET750-12-050 Block Diagram [email protected] PET750-12-050xA 3 General Condition: Tamb = -25 to 70°C unless otherwise noted. PARAMETER DESCRIPTION / CONDITION MIN NOM MAX UNIT Vi nom Nominal Input Voltage 100 240 VAC Vi Input Voltage Ranges Normal operating (Vi min to Vi max) 90 264 VAC Ii max Max Input Current 10 Arms Inrush Current Limitation1 Ii p Vi min to Vi max, 90°(Phase), TNTC = 25°C 50 Ap (Cold start) Fi Input Frequency 47 50/60 63 Hz PF Power Factor Vi nom, 50Hz, I1 nom 0.95 W/VA Vi on Turn-on Input Voltage Brown in 80 85 90 VAC Vi off Turn-off Input Voltage Brown out 75 80 85 VAC Vi nom, 0.2∙Ix nom, Vx nom, TA = 25°C 92 η Efficiency without Fan Vi nom, 0.5∙Ix nom, Vx nom, TA = 25°C 94.3 % Vi nom, Ix nom, Vx nom, TA = 25°C 93.5 After last AC zero point, V1 > 10.8 V, VSB within Thold Hold-up Time 24 ms regulation, Vi = 230 VAC, Px nomX60% 1 The charging currents for X capacitors are not considered as in-rush current 3.1 EFFICIENCY The power supply module efficiency should meet at least 80Plus Platinum rating, the efficiency should be measured at 230 VAC and with external fan power according to 80Plus efficiency measurement specifications. 1.00 0.98 0.96 0.94 0.92 0.90 0.88 0.86 Vin=115Vac Power Factor 0.84 Vin=230Vac 0.82 0.80 0.00 100.00 200.00 300.00 400.00 500.00 600.00 700.00 800.00 Po (W) Figure 2. Efficiency vs. Load current (ratio metric loading) Figure 3. Power factor vs. Load current Asia-Pacific Europe, Middle East North America +86 755 298 85888 +353 61 225 977 +1 408 785 5200 © 2019 Bel Power Solutions BCD.00360_AD1 4 PET750-12-050xA 5.1 MAIN OUTPUT V1 General Condition: Ta = 0 … +50 °C unless otherwise noted. PARAMETER DESCRIPTION / CONDITION MIN NOM MAX UNIT Main Output V1 V1 nom 12.0 VDC Nominal Output Voltage 0.5 ∙I1 nom, Tamb = 25 °C V1 set -0.5 +0.5 % V1 nom P1 nom Nominal Output Power V1 = 12V 744 W Input voltage 165-264 VAC 62 3 I1 nom Nominal Output Current ADC Input voltage 90-164 VAC 43 2 V1 pp Output Ripple Voltage V1 nom, I1 nom, 20MHz BW (See Section 4.1) 120 mVpp dV1 Load Load Regulation Vi = Vi nom, 0 - 100 % I1 nom, Ta min to Ta max -2 +2 % V1 nom dV1 Line Line Regulation Vi =Vi min…Vi max , Ta min to Ta max -1 +1 % V1 nom dIshare Current Sharing Deviation from I1 tot / N, I1 > 10% -5 +5 ADC dVdyn Dynamic Load Regulation -5 +5 % V1 nom ΔI1 = 50% I1 nom, I1 = 5 … 100% I1 nom, dI1/dt = 1A/ s, recovery within 1% of V1 nom Trec Recovery Time μ 2 ms CV1 Load Capacitive Loading Ta = 25°C 11000 μF Standby Output VSB VSB nom Nominal Output Voltage 5.0 VDC 0.5 ∙ISB nom, Tamb = 25°C VSB set Output Setpoint Accuracy -0.5 +0.5 %V1nom dVSB tot Total Regulation Vi min to Vi max, 0 to 100% ISB nom, Ta min to Ta max -1.5 +1.5 %VSBnom PSB nom Nominal Output Power 15 W ISB nom Nominal Output Current 3 ADC 2 VSB pp Output Ripple Voltage VSB nom, ISB nom, 20 MHz BW 50 mVpp dVSB Droop 0 - 100 % ISB nom 90 mV dVSBdyn Dynamic Load Regulation ΔISB = 50% ISB nom, ISB = 5 … 100% ISB nom, -3 +3 %VSBnom dISB/dt = 0.5 A/ S, recovery within 1% of VSB nom Trec Recovery Time μ 250 μs CVSB load Capacitive Loading for 5VSB Tamb = 25°C 350 μF 2 The output noise and ripple measurement was made with 20MHz bandwidth using a 6-inch twisted pair, terminated with a 10 uF tantalum capacitor in parallel with a 0.1uF 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. 3 The output power derating at low line only for PET750-12-050NA, for RA model no derating required. [email protected] PET750-12-050xA 5 PARAMETER DESCRIPTION / CONDITION MIN NOM MAX UNIT F Input Fuse (Line) Not user accessible, quick-acting (F) 12.5 Arms V1 OV OV Threshold V1 Refer to section 5.1 13.3 14.5 VDC unlatch unit by disconnecting AC or by toggling the V1 UV UV Threshold V1 10.5 VDC PS_ON signal IV1 lim Current Limit V1 Refer to section 5.3 68 78 ADC V1 < 3V (unlatch unit by disconnecting AC or by IV1 SC Max Short Circuit Current V1 250 ADC toggling the PS_ON signal) VSB OV OV Threshold VSB Unlatch unit by disconnecting AC 5.75 6.5 VDC ISB lim Current Limit VSB Hiccup mode 3.5 4.5 ADC Over Temperature on Inlet Automatic recovery with Hysteresis for NA model 70 °C TSD Over Temperature Oring Automatic recovery with Hysteresis for NA model 100 °C Over Temperature on Inlet Automatic recovery with Hysteresis for RA model 60 °C TSD Over Temperature Oring Automatic recovery with Hysteresis for RA model 110 °C 5.1 OVERVOLTAGE PROTECTION The PET front-ends provide a fixed threshold over voltage protection implemented with a HW comparator. Once an over voltage condition has been triggered, the power supply will shut down and latch the fault condition. The latch can be unlatched by disconnecting the supply from the AC mains or by toggling the PS_ON input. 5.2 UNDERVOLTAGE DETECTION The main output will latch off when V1 drop to below the UV threshold. The latch can be unlatched by disconnecting the supply from the AC mains or by toggling the PS_ON input. The main output will shut down if the VSB voltage drop below 4 V and recover when VSB voltage higher than 4.3 V. 5.3 CURRENT LIMITATION MAIN OUTPUT The main output exhibits a substantially rectangular output characteristic controlled by a software feedback loop. If it runs in current limitation and its voltage drops below ~10.8 VDC for more than 10 ms, the output will latch off (standby remains on). 12 10 8 6 4 Main Main output Voltage (V) 2 0 0 10 20 30 40 50 60 70 80 Main Output Current (A) Figure 4.
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