Common redundant power supply

Products and reference designs

Common redundant power supply

Block diagram

Overview

Our integrated circuits and reference designs help you create compact server power supply units (PSUs) with 12-V output aimed to meet 80+ titanium standards.

Design requirements

Server PSU with 12-V output designs often require:

  • Higher efficiency (80+ titanium) across 20-80% load range with soft-switching, bridgeless PFC or GaN.
  • Compact size and high power density for data-center applications.
  • Digital solution with PMBus for scalability and connectivity.

Block diagram

Find products and reference designs for your system.

Server PSU with 12V output

Auxiliary power supply Auxiliary power supply HV-MOSFET HV-MOSFET LV-MOSFET LV-MOSFET Flyback controller Flyback controller SR controller SR controller LDO LDO VREF VREF Buck DC/DC Buck DC/DC Buck DC/DC Buck DC/DC Isolated DC/DC power stage Isolated DC/DC power stage HV-MOSFET(2X) HV-MOSFET(2X) LV-MOSFET(4X) LV-MOSFET(4X) Gate driver Gate driver SR driver(2X) SR driver(2X) 12 VDC 12 VDC Primary output Primaryoutput Secondary output Secondary output CLK CLK Data Data 12 VSB 12 VSB Current and voltage sense Current and voltage sense Comp (2X) Comp(2X) Amp (3X) Amp(3X) VREF VREF Control unit Control unit Digital controller Digital controller Isolator Isolator Supervisor Supervisor Temperature sensor Temperature sensor VREF VREF Comp (3X) Comp(3X) Output protection Output protection LV-MOSFET (3X, ORing) LV-MOSFET(3X, ORing) Comp (2X) Comp(2X) Amp (2X) Amp(2X) PFC stage PFC stage Digital PFC controller Digital PFC controller HV-MOSFET(2X) HV-MOSFET(2X) Gate driver Gate driver Comp (1X) Comp(1X) AC AC Filter and rectifier Filter and rectifier EMI filter EMI filter Rectifier bridge Rectifier bridge

Technical documentation

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Type Title Date
Test report 3.6kW Single-phase totem-pole bridgeless PFC reference design with e-meter functionality (Rev. B) PDF | HTML 18 Jul 2024

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