36W, 100-425VDC, >92% Efficiency, Dual Output, Auxiliary Supply Reference Design for Server PSU

1 января 2018

The TIDA-00709 is a 36-W, dual output, auxiliary power supply with provision to accept both wide ranges of DC as well as AC input. Based on the input, this TI Design can be used as an adapter or auxiliary power supply designed for use in power converters targeted for server, telecom, and industrial system applications. This reference design is a quasi-resonant (QR) flyback converter implemented using the UCC28740 constant voltage-constant current (CV-CC) flyback controller with optocoupled feedback for voltage and primary-side regulation (PSR) for current. For improved efficiency, the TIDA-00709 uses synchronous rectification with sync controller UCC24636 and low RDS(on) MOSFET for main 12- V_ISO/2.75-A output. Hardware is designed and tested to pass conducted emissions, surge and EFT requirements. Additionally, the design has a built-in eFuse for multiple faults isolation for main output rail without effecting any other output.

Особенности

High Efficiency of > 90% With AC Input and > 92% With DC Input Minimum Efficiency > 86.5% at 10% Load Aids to Meet 80Plus Titanium Standard of Server PSUs Low Standby Power (≈ 120 mW) Aids to Meet NoLoad Condition Limits of DoE Level VI and EU CoC Tier-I Compact Form-Factor to Achieve High Power Density Solutions: – DC/DC: 40 mm × 45 mm – AC/DC: 70 mm × 45 mm Dual Output: 12 V/0.25 A and 12 V_ISO/2.75 A