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Texas Instruments UCC28720 | Demoboard PMP9059
120VAC Input 5V/200mA Flyback Converter With BJT Switch Reference Design
Overview
| Topology | Flyback Converter |
| Input voltage | 90-132 V |
| Output 1 | 3.3 V / 0.05 A |
| Output 2 | 5 V / 0.15 A |
| IC revision | B |
Description
This reference design creates a 5V at 200mA from a 120VAC Input. This supply is to designed to fit into a very small volume with approximately 10mm total height. The UCC28720 primary side controller with a BJT power switch provides a low cost design. A TPS71433 is also used to provide an additional 3.3V rail. It is important to note the outputs are only functionally (not for safety) isolated from the input.
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Product series | VIN | VOut1 (V) | IOut1 (A) | Vaux (V) | fswitch (kHz) | L (mH) | NPRI : NSEC : NAUX | VT (V (AC)) | L (mm) | W (mm) | H (mm) | Mount | Size | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 750314178 | SPEC | 4 files | MID-OLTI Offline Flyback Transformers for Texas Instruments | 85 - 132 V (AC) | 5 | 0.2 | 18 | 100 | 2.5 | 12:1:3 | 625 | 10 | 12.07 | 5.97 | SMT | ER9.5 |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Product series | VIN | VOut1 (V) | IOut1 (A) | Vaux (V) | fswitch (kHz) | L (mH) | NPRI : NSEC : NAUX | VT (V (AC)) | L (mm) | W (mm) | H (mm) | Mount | Size | Samples |
|---|