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Texas Instruments UCC28704 | Demoboard TIDA-01503
20-W, 100- to 425-V DC, 85% Efficient, Multi-Output, Auxiliary Power Supply Reference Design
Overview
| Topology | Flyback Converter |
| Input voltage | 100-425 V |
| Switching frequency | 85 kHz |
| Output 1 | 5 V / 3 A |
| IC revision | 001 |
Description
This 20-W multiple output, auxiliary power reference design supports AC/DC industrial power supplies with a wide input voltage range (100-425 VDC). The design achieves a peak efficiency of 85% by using discontinuous conduction mode (DCM) valley-switching of TI’s UCC28704 flyback controller with primary side regulation. The compact design uses a minimum number of components to help protect the system, including output overcurrent and output short circuit. The hardware is tested to meet Conducted Emission norm EN55022 Class A using an external EMI filter.
Features
Remark: BOM and Test result are added.
FeaturesPeak power conversion efficiency of >85% at 400VDC full loadDesigned for wide operating input voltage range from 100- to 425-V DCDelivers full power of 20 W over the entire operating voltage rangeConfigurable outputs: 15V (primary referred), 5V & 15V (isolated)Low stand-by power of <100mWCompact form-factor to achieve high power density solutions: 40mm × 40mm
Typical applications
- Auxiliary Power for AC/DC, Server Power Supply
- Telecom Rectifiers
- UPS and Industrial Power Supplies
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IR(A) | ISAT,10%(A) | RDC max.(Ω) | fres(MHz) | Version | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-TI Radial Leaded Wire Wound Inductor, 2.2 µH, 6.3 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TI Radial Leaded Wire Wound Inductor | Inductance2.2 µH | Rated Current6.3 A | Saturation Current @ 10%5.7 A | DC Resistance0.02 Ω | Self Resonant Frequency65 MHz | VersionHeat Shrinking Tube |