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Texas Instruments LM51551 | Demoboard PMP40569
36~57-Vdc input, 5-V/4-A output isolated flyback with synchronous rectification reference design
Overview
| Topology | Flyback Converter |
| Input voltage | 36-57 V |
| Switching frequency | 100-2200 kHz |
| Output 1 | 5 V / 4 A |
| IC revision | E1 |
Description
This reference design is a 36~57-Vdc input, 5-V/4-A output isolated flyback converter using LM5155 and UCC24612. The switching frequency is 250 kHz. With the synchronous rectification controller UCC24612 and a MOSFET at the secondary side, the system achieves 89.29% peak efficiency at 36-V input, which is 3.86% higher than Schottky rectification. The temperature of the rectified MOSFET is 33 degrees Celsius lower than Schottky under full load output. The load regulation in the whole input range is within ±0.5%.
Features
- An isolated flyback with simple synchronous rectification solution
- 250-kHz switching frequency
- 89.29% peak efficiency
- Low temperature rise of rectified component
Typical applications
- Multiple-Output Flyback Without Optocoupler / Wide Input Boost, SEPIC, Flyback Power Module
- POE
- Battery-Powered Boost, SEPIC, Flyback
- Portable Speaker Application
- LED Bias Supply
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | Pins | PCB/Cable/Panel | Modularity | Type | Wire Section | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WR-TBL Series 2141 - 3.50 mm Horiz. Entry Modular, 2, Rising Cage Clamp | Simulation– | Downloads6 files | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-TBL Series 2141 - 3.50 mm Horiz. Entry Modular | Pins2 | PCB/Cable/PanelPCB | ModularityYes | TypeHorizontal | Wire Section 24 to 16 (AWG) 0.2 to 1 (mm²) | ||
750344489 | Power over Ethernet Transformer, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product series Power over Ethernet Transformer | – | – | – | – | – |