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Texas Instruments UCC28742 | Demoboard PMP31087
31-W offline valley-switching flyback with multiple outputs reference design
Overview
| Topology | Flyback Converter |
| Input voltage | 85-265 V |
| Switching frequency | 80 kHz |
Description
This reference design uses the UCC28742 flyback controller to generate two outputs (12 V at 2.2 A and 3.3 V at 1.5 A) from a universal input. UCC28742 uses an optical coupler to regulate the output and improve transient response. The valley-switching technique reduces switching losses and keeps the efficiency high.
Features
- Resonant-ring valley-switching operation
- Dual isolated outputs consisting of 12 V at 2.2 A and 3.3 V at 1.5 A
- Universal AC-input voltage range of 85 VAC to 265 VAC
- Output over-voltage and over-current protection
- Complete tested design with available design files and test report
Typical applications
- Industrial and Medical AC-to-DC Power Supplies, Smart Electricity Meters, Bias Supply for UPS, Server PSU, etc, Power Supply for Cable Modem, Power Supply for Cable Modem, Television, SetTop Box, and Wireless Routers
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Product series | C | VR (V (DC)) | Endurance (h) | Operating Temperature | IRIPPLE (mA) | ILeak (µA) | DF (%) | Pitch (mm) | Ø D (mm) | L (mm) | Packaging | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 860241381004 | SPEC | 6 files | WCAP-AT1H Aluminum Electrolytic Capacitors | 33 µF | 400 | 10000 | -25 °C up to +105 °C | 870 | 628 | 20 | 7.5 | 18 | 21 | Ammopack |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 860241381004 | SPEC |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Product series | C | VR (V (DC)) | Endurance (h) | Operating Temperature | IRIPPLE (mA) | ILeak (µA) | DF (%) | Pitch (mm) | Ø D (mm) | L (mm) | Packaging | Samples |
|---|