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Overview
| Topology | Flyback Converter |
| Input voltage | 90-264 V |
| IC revision | B |
Description
This reference design uses the UCC28780 active clamp flyback controller to generate an isolated output of 20 V @ 3.5 A over an input voltage rage of 90 Vac to 264 Vac. The design also uses the UCC24612 synchronous rectifier controller on the secondary side. Zero voltage switching (ZVS) ensures high efficiency over a wide operating range.
Features
- Zero voltage switching (ZVS) provides high efficiency (93% peak value)
- Adaptive burst mode feature maintains high efficiency even at light loads
- Synchronous rectifier using drain-to-source voltage sensing
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | ISAT,10%(A) | fres(MHz) | Version | IR(A) | L(µH) | RDC max.(Ω) | VR(V (AC)) | VT(V (AC)) | Material | L(mm) | W(mm) | H(mm) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-TI Radial Leaded Wire Wound Inductor, 4.7 A, 27 MHz | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TI Radial Leaded Wire Wound Inductor | Saturation Current @ 10%4.7 A | Self Resonant Frequency27 MHz | VersionHeat Shrinking Tube | Rated Current4 A | Inductance10 µH | DC Resistance0.033 Ω | – | – | – | Length9.5 mm | Width9.5 mm | Height8 mm | MountTHT | ||||
| WE-TI Radial Leaded Wire Wound Inductor, 8.5 A, 140 MHz | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TI Radial Leaded Wire Wound Inductor | Saturation Current @ 10%8.5 A | Self Resonant Frequency140 MHz | VersionHeat Shrinking Tube | Rated Current8.5 A | Inductance1 µH | DC Resistance0.015 Ω | – | – | – | Length6 mm | Width6 mm | Height8.5 mm | MountTHT | ||||
 | WE-CMB Common Mode Power Line Choke, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CMB Common Mode Power Line Choke | – | – | VersionTHT | Rated Current1.5 A | Inductance20000 µH | DC Resistance0.27 Ω | Rated Voltage250 V (AC) | Insulation Test Voltage1500 V (AC) | MaterialMnZn | Length23 mm | Width13.8 mm | Height25.5 mm | MountTHT | ||||
 | 750318431 | Offline Transformer, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product series Offline Transformer | – | – | – | – | Inductance120 µH | – | – | Insulation Test Voltage3000 V (AC) | – | Length27.05 mm | Width32.25 mm | Height22.86 mm | MountTHT |