LM3409: SCH review

Jingguo Wang

Intellectual 1080 points

Part Number: LM3409

Tool/software:

laser power_V01_20240627.pdf

Hi team,

my customer use LM3409 in their projector project, could you help to review the SCH design?

2 months ago

+1 Hailee Xu 2 months ago

TI__Expert 7450 points

Hi Jingguo,

Please also share your design requirement, like inductor current ripple/output current ripple, input voltage range...

or you can share the calculation file, and I can help you review it.

BR,

Hailee.

0 Jingguo Wang 2 months ago in reply to Hailee Xu

TI__Intellectual 1080 points

7674.UTZ-SF0200E_1_NUBB24.pdf 3323.UTZ-SF0244E_0_NUMB22.pdf

Hi Hailee

Customer is using Nichia’s laser power as attached. VIN=36V, and maximum current is about 3.8A.

Jingguo

+1 Hailee Xu 2 months ago in reply to Jingguo Wang

TI__Expert 7450 points

Hi Jingguo,

Generally, it's okay.. But for parameters' selection, please provide a detailed design requirement, like inductor current ripple and output current ripple. Or you can refer to our datasheet- 9.2.1 EN PIN PWM Dimming Application for 10 LEDs, it is clear to help you verify it.

BR,

Hailee.

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LM3409: SCH review