This reference design contains two duplicate LED drivers. Each circuit drives a 10V to 50V series connected string of LEDs at 350mA. The input range is 55VDC to 75VDC. The TPS40210 boost controller is used in an "upside-down" buck topology for a simple, low-cost solution. This circuit includes an enable, PWM dimming, current trimming, and a current sense functions for interfacing with an external microprocessor.
| Output voltage options | PMP4791.1 |
|---|---|
| Vin (Min) (V) | 55 |
| Vin (Max) (V) | 75 |
| Vout (Nom) (V) | 50 |
| Iout (Max) (A) | .35 |
| Output Power (W) | 17.5 |
| Isolated/Non-Isolated | Non-Isolated |
| Input Type | DC |
| Topology | Buck- Non Sync |
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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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
Includes TI products in the design and potential alternatives.
| Type | Title | Date | |
|---|---|---|---|
| Test report | PMP4791 Test Results | Feb. 22, 2012 |
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