TIDA-00709 is a 36-W dual-output auxiliary power supply with provision to accept both wide ranges of DC and AC inputs. Based on the input, this reference 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 UCC28740 constant voltage-constant 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/2.75-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 fault isolation for main output rail without affecting any other output.
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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Reference design overview and verified performance test data
Detailed overview of design layout for component placement
Complete listing of design components, reference designators, and manufacturers/part numbers
Files used for 3D models or 2D drawings of IC components
Design file that contains information on physical board layer of design PCB
PCB layer plot file used for generating PCB design layout
Detailed schematic diagram for design layout and components
Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | 36W, Universal Input, >90% Efficiency, Dual Output Aux Supply Ref Design for PSU (Rev. A) | Feb 6, 2017 | |
| Application note | Designing with the ATL431LI | Nov 27, 2018 | ||
| More literature | Snubbing the flyback converter | Nov 7, 2016 | ||
| Application note | Seminar 900 Topic 2 - Snubber Circuits: Theory, Design and Application | Feb 15, 2001 |
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