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LED N-1 architecture device and Heat function question

JOHN KUO
Intellectual 350 points

Hi Sir,

1. May I know TPS92638 have LED N-1 architecture device can suggest to me? Fog light demand 560mA current and LED architecture 2S4P.

2. May I know TPS92610 Heat Sharing With a Parallel Resistor function can config Ip (ILED*0.7) and Idriver(ILED*0.3)? Reverse Light demand 450mA and LED architechture 2S6P.

below is our schematic and RC setting, please help review and suggestion to it.

  • 0
    TI__Expert 5475 points

    Hi John,

    1. If you need to realize N-1, just pull FAULT pin to a high voltage. If the total current demand is 560mA, you need to check the thermal capability of the device and system. Besides that, the REF resistor you use now is 10k. In that case, the current for each channel is around 24mA. I am curious how you can get the 560mA total current.

    2. It's ok if you want to configure the current distribution as Ip (ILED*0.7) and Idriver(ILED*0.3). Just make sure the thermal of both the device and parallel resistor is within their capability.

    Best regards,

    Shirley He