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Overview
| Topology | Flyback Converter |
| Input voltage | 120-437 V |
| Output 1 | 5 V / 2 A |
| Output 2 | 8 V / 0.3 A |
| IC revision | B |
Description
The PMP30285 reference design uses the UCC28740 flyback controller to generate two outputs (5V @ 2A / 8V @ 0.3A) from an 120VAC to 437VAC input. The negative terminal of the 5V output is connected to the primary side (LINE). A transformer with a common mode cancellation winding is used to lower the EMI. The UCC28740 uses an optical coupler to regulate the output and to improve transient response. The valley-switching technique reduces switching losses and keeps the efficiency high.
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | ISAT(A) | fres(MHz) | IR(A) | L(µH) | RDC max.(Ω) | VR(V (AC)) | VT(V (AC)) | Material | L(mm) | W(mm) | H(mm) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-TI HV Radial Leaded Wire Wound Inductor (High Voltage), 0.76 A, 2.5 MHz | Status Activei| Production is active. Expected lifetime: >10 years. | Saturation Current0.76 A | Self Resonant Frequency2.5 MHz | Rated Current0.52 A | Inductance680 µH | DC Resistance1.68 Ω | – | – | – | Length7.8 mm | Width7.8 mm | Height9.5 mm | MountTHT | |||||
 | 750317049 | Transformer, 0.95 A, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product series Transformer | Saturation Current0.95 A | – | – | Inductance1100 µH | – | – | Insulation Test Voltage4000 V (AC) | – | Length22.2 mm | Width25 mm | Height16 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 | – | – | Rated Current1 A | Inductance10000 µH | DC Resistance0.36 Ω | Rated Voltage250 V (AC) | Insulation Test Voltage1500 V (AC) | MaterialMnZn | Length17.5 mm | Width13 mm | Height22 mm | MountTHT |