Texas Instruments UCC28740 | Demoboard TIDA-00709

Description

The TIDA-00709 is a 36-W, dual output, auxiliary power supply with universal DC input targeted for Server and Telecom Power Supply. This reference design is a quasi-resonant (QR) flyback converter implemented using the UCC28740 constant voltageconstant current (CV-CC) flyback controller with optocoupled feedback for voltage and primary-side regulation (PSR) for current. For improved efficiency, TIDA-00709 uses synchronous rectification with sync controller UCC24636 and low RDS(on) MOSFET for main 12-V_ISO/2.75A output The design is compact and affordable with almost all the necessary built-in protections such as output over-voltage and short circuit. Additionally, the design has a built-in eFuse for fault isolation on the 12-V main output rail without effecting any other output.

Features

• High average efficiency of >91% and peak efficiency of >92%
• As auxiliary supply, minimum efficiency >86.5% at 10% load aids to meet 80 plus titanium standard of server PSUs>Compact form-factor to achieve high power density solutions: 40mm x 45mm
• Low standby power (~100 mW) aids to meet no-load condition limits of DoE level VI and EU CoC tier-2
• Dual output: 12V/0.25A and 12V_ISO/2.75A

Typical applications

• Housekeeping PSU for UPS,Battery Chargers
• AC-DC Adapters,Auxiliary Power for Server PSU and Telecom

More information

• Datasheet