LP5009: Suggestion for LED driver

Johan Gjellan

Prodigy 370 points

Part Number: LP5009
Other Parts Discussed in Thread: LM3642

Hi,

I am looking for a LED driver which fulfills the following criteria:

Number of LEDs: 4

Voltage range: 8 to 14V

Current budget: 40 mA

Regards,

Johan

over 4 years ago

0 Yuting Shao over 4 years ago

TI__Genius 13001 points

Hi Gjellan,

Since the input voltage is lower or little higher than required output, boost or pass mode is needed. How about LM3642? This device starts with pass mode, and when the difference between VIN and VOUT is larger than threshold, device switches to boost mode.

BR,

Robin

0 Johan Gjellan over 4 years ago in reply to Yuting Shao

TI__Prodigy 370 points

Hi Robin,

Sorry for being unclear. The input voltage range is from 8-14V (assuming 12 V typ.). The output voltage is still unknown.

Best regards,

Johan

0 Yuting Shao over 4 years ago in reply to Johan Gjellan

TI__Genius 13001 points

Hi Gjellan,

If the number of LED is 4, then the output voltage should be from 12V to 14V.

BR,

Robin

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LP5009: Suggestion for LED driver