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Overview
| Topology | Flyback Converter |
| Input voltage | 85-400 V |
| Output 1 | 12 V / 1.1 A |
Description
85-VAC - 400-VAC input multiple output flyback reference designThis offline flyback reference design uses the UCC28700 controller to generate 2 isolated outputs (12 V at 1.2 A, -3.3 V at 10 mA) from an AC input (85 VAC - 400 VAC). The controller provides accurate voltage and current regulation with primary-side feedback, eliminating the need for opto-coupler feedback circuits. The valley-switching technique reduces switching losses and keeps the efficiency high.
Features
85 VAC - 400 VAC input to 2 isolated outputsValley-switching operation for high overall efficiencyPrimary-side regulation eleminates opto-couplerPrecise control of output voltage and current
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | ISAT,10%(A) | fres(MHz) | Version | VIN | VOut1(V) | IOut1(A) | VOut2(V) | IOut2(mA) | Vaux(V) | fswitch(kHz) | NPRI : NSEC : NAUX | ISAT(A) | Size | 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, 0.57 A, 4.8 MHz | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TI Radial Leaded Wire Wound Inductor | Saturation Current @ 10%0.57 A | Self Resonant Frequency4.8 MHz | VersionHeat Shrinking Tube | – | – | – | – | – | – | – | – | Saturation Current0.5 A | Size5075 | Rated Current0.5 A | Inductance220 µH | DC Resistance1.2 Ω | – | – | – | Length6 mm | Width6 mm | Height8.5 mm | MountTHT | ||||
 | WE-TFC Common Mode Power Line Choke, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TFC Common Mode Power Line Choke | – | – | – | – | – | – | – | – | – | – | – | – | SizeUU 9.8 V | Rated Current0.45 A | Inductance10000 µH | DC Resistance1.65 Ω | Rated Voltage300 V (AC) | Insulation Test Voltage2500 V (AC) | MaterialMnZn | Length17 mm | Width11.5 mm | Height17 mm | MountTHT | ||||
 | WE-OLTI Offline Flyback Transformers, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-OLTI Offline Flyback Transformers | – | – | – | Input Voltage 85 - 400 V (AC) | Output Voltage 112 V | Output Current 11.1 A | Output Voltage 24 V | Output Current 210 mA | Auxiliary Voltage25 V | Switching Frequency 100 | Turns Ratio21:3:1:6 | Saturation Current1.5 A | SizeEE20/10/6 | – | Inductance600 µH | – | – | Insulation Test Voltage4800 V (AC) | – | Length21.5 mm | Width25 mm | Height16 mm | MountTHT |