800W Platinum Efficiency Server Power
Release time:
2023-05-24 15:48
PROJECT INTRODUCTION
This reference design provides a low-cost server power solution. Thesystem is designed with PFC and synchronous rectifier LLC topologyusing a single Spintrol ARM4 MCU SPC1168 to control both the PFCand LLC. This solution achieves the requirements of platinumefficiency and standby power consumption standard, meets the iTHDdynamic and current sharing design requirements of full load range.which is a highly completed server power reference solution.
DESIGN SPECIFICATION
Input Voltage | 90Vac~264Vac |
Output Voltage | 12Vdc |
Rated Power | 800W |
System Efficiency | 94%ahalf load,92%afull load |
PF | >0.99 |
Switching Frequency | PFC:65KHz LLC:80-350KHz |
FEATURES
· Single ARM4 MCU design, most cost effitive;
· Meets 80+ Platinum efficiency standards and PF & iTHD requirements
· Compatible with AC&DC input;
· Active current sharing;
· Full protection,including input UVLO&OCP, output OVP&OCP and shortcircuit protection;
MAIN TOPOLOGY
MAIN DEVICES
Function | Part Number | Brand |
Input Fuse | 0487020MXEP | Littelfuse |
Input Rectifier Bridge | GB]2508 | HY |
PFC Current Sensor | MCA1101-20-5 | Aceinna |
PFC MOSFET | SRC60R090BT | Sanrise |
PFC Diode | G4HO6510AT | GlobalPower |
PFC MOs Driver | IX4340N | IXYS |
LLC Primary MOSFET | SRC60R140BTC-E | Sanrise |
LLC Primary Mos Driver | NSI6602B-DSPNR | Novosense |
LLC Secondary MOSFET | PDC3094X | Potems |
LLC Secondary Mos Driver | IXDN609SIA | IXYS |
MEASUREMENT RESULTS AND WAVEFORMS
Efficiency curve @ 220Vac input
PF curve
iTHD
Full load start up
Full load start-up @163Vdc input
12Vsb stand-by and short circuit protection
Output voltage ripple 103mV @no load
Output voltage ripple 11 6mV @full load
12VDC main output OVP protection 13.5V
12Vdc main output short circuit protection
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