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Texas Instruments UCC28742 | Demoboard PMP40467
AC Input,12-V/5-A and 50-V/1-A dual-output flyback reference design
Overview
| Topology | Flyback Converter |
| Input voltage | 180-264 V |
| Switching frequency | 80-130 kHz |
| Output 1 | 12 V / 5 A |
| Output 2 | 50 V / 1 A |
| IC revision | 001 |
Description
This reference design is a 12-V/5-A and 50-V/1-A isolated dual-output auxiliary power supply. Secondary-side regulation improves the line and load regulation using UCC28742. DCM valley-switching operation enable higher efficiency at light load. All components height below 20 mm enable slim TV application.
Features
- Valley-switching enable higher efficiency at light load
- Higher integrated protection simplifies the bom cost and save space
- Components height is below 20 mm to enable slim TV application
Typical applications
- Smart Electricity Meters
- Industrial and Medical AC-to-DC Power Supplies / Bias Supply for UPS, Server PSU
- Power Supply for Cable Modem, Television, Set-Top Box, and Wireless Routers
- AC-to-DC Power Supply for Appliances
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | Safety Class | dV/dt(V/µs) | DF @ 1 kHz(%) | RISO | Pitch(mm) | Packaging | IRP,40K(A) | fres(MHz) | Size | Version | ISAT,10%(A) | ISAT,30%(A) | IR(A) | L(mH) | RDC max.(mΩ) | VR(V (AC)) | VT(V (AC)) | Material | L(mm) | W(mm) | H(mm) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WCAP-FTX2 Film Capacitors, Across the mains, 68 nF | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-FTX2 Film Capacitors | Capacitance68 nF | Safety ClassX2 | Rate of Voltage Rise400 V/µs | Dissipation Factor0.1 % | Insulation Resistance30 GΩ | Pitch7.5 mm | PackagingCarton | – | – | SizePitch 7.5 mm | – | – | – | – | – | – | Rated Voltage275 V (AC) | – | – | Length10 mm | Width6 mm | Height12 mm | MountBoxed THT | ||||
 | WE-CMB Common Mode Power Line Choke, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CMB Common Mode Power Line Choke | – | – | – | – | – | – | – | – | – | SizeXS | VersionTHT | – | – | Rated Current1.5 A | Inductance4 mH | DC Resistance140 mΩ | Rated Voltage250 V (AC) | Insulation Test Voltage1500 V (AC) | MaterialMnZn | Length15.8 mm | Width7.8 mm | Height18 mm | MountTHT | ||||
 | WE-PD SMT Power Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | – | – | – | – | – | – | – | Performance Rated Current3.9 A | Self Resonant Frequency5.5 MHz | Size1210 | VersionStandard | Saturation Current @ 10%3.6 A | Saturation Current @ 30%4.4 A | Rated Current3.2 A | Inductance0.068 mH | DC Resistance89 mΩ | – | – | – | Length12 mm | Width12 mm | Height10 mm | MountSMT | ||||
| WE-PD SMT Power Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | – | – | – | – | – | – | – | Performance Rated Current2.6 A | Self Resonant Frequency3.5 MHz | Size1210 | VersionStandard | Saturation Current @ 10%2.7 A | Saturation Current @ 30%3.3 A | Rated Current2.1 A | Inductance0.15 mH | DC Resistance200 mΩ | – | – | – | Length12 mm | Width12 mm | Height10 mm | MountSMT | ||||
 | WE-LHMI SMT Power Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LHMI SMT Power Inductor | – | – | – | – | – | – | – | Performance Rated Current4.5 A | Self Resonant Frequency90 MHz | Size4012 | – | Saturation Current @ 10%5.65 A | Saturation Current @ 30%10 A | – | Inductance0.001 mH | DC Resistance47 mΩ | – | – | – | Length4.45 mm | Width4.06 mm | Height1 mm | MountSMT |