20W: 100-425VDC: 85% Efficient: Multi-Output: Auxiliary Power Supply Reference Design
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
- Peak 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 Compact form-factor to achieve high power density solutions: 40mm × 40mm
Applications
- Oscilloscopes & digitizers
- Digital multimeter (DMM)
- Three phase UPS
- Lab & field Instrumentation
- Automotive test
- Rack & server PSU with 48-V output
- Radar
- Single phase online UPS
- Medical PSU
- Merchant telecom rectifiers
- Battery cell formation & test equipment
- Power supply module
- Telecom monitor unit
- Single phase line interactive UPS
- Power distribution unit (PDU)
- Server PSU with 12-V output
Product Categories
- Power management