This reference design is a 700-W buck converter using the LM5143A-Q1 device. Due to low dead times, ultra-strong drivers and the ability to adjust the rising and falling edges individually, the resulting efficiency is 98%. Because of reduced loss, the board area measures 150 mm × 125 mm, with a low profile of 12 mm or 15 mm, depending on the inductor selected. Ample headroom for increased output power is available by using forced cooling or a heat sink mounted to a chassis. Using additional cooling options, the output current can be increased to 60-A continuous and higher. The interleaved operation results in low root mean square (RMS) stress at the input capacitor and reduced ripple at the input and the output. A generic two stage EMI input filter is provided.
| Output voltage options | PMP31202.1 |
|---|---|
| Vin (Min) (V) | 20 |
| Vin (Max) (V) | 28 |
| Vout (Nom) (V) | 13.8 |
| Iout (Max) (A) | 50 |
| Output Power (W) | 690 |
| Isolated/Non-Isolated | Non-Isolated |
| Input Type | DC |
| Topology | Buck- Multiphase^Buck- Synchronous |
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
Download ready-to-use system files to speed your design process.
Test results for the reference design, including efficiency graphs, test prerequisites and more
Detailed schematic diagram for design layout and components
Complete listing of design components, reference designators, and manufacturers/part numbers
Detailed overview of design layout for component placement
Files used for 3D models or 2D drawings of IC components
Design file that contains information on physical board layer of design PCB
PCB layer plot file used for generating PCB design layout
Includes TI products in the design and potential alternatives.
This stand-alone tool facilitates and assists with the design of a DC/DC buck regulator based on the LM5143-Q1 synchronous buck DC/DC controller with low IQ. The user can expeditiously arrive at an optimized design to meet the application requirements.
| Type | Title | Date | ||
|---|---|---|---|---|
| Test report | 4-Phase Buck 700-W Reference Design | PDF | HTML | Dec. 07, 2022 |
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