Two or three TPS92551 in parallel configuration.

Oscar Gomez Fuente

Expert 2066 points

Other Parts Discussed in Thread: TPS92551

Hi,

If I use two or three led drivers TPS92551, Can I connect all DIM inputs to the same PWM input?

Thank you so much. Best Regards.

over 10 years ago

0 Issac Hsu over 10 years ago

TI__Expert 3920 points

Hi Oscar,

We did not try PWM dimming with parallel operation, however, without PWM dimming it is possible as shown below (with say 2.2 uF or above output capacitance):

0 Oscar Gomez Fuente over 10 years ago in reply to Issac Hsu

Expert 2066 points

Ok,

Thank you, but I need to know If It works the dim function in parallel mode.

I am trying this connexion, but It doesn't work fine the dim mode:

Thank you so much. Best regards.

https://e2e.ti.com/support/power_management/led_driver/f/192/t/450070https://e2e.ti.com/support/power_management/led_driver/f/192/t/450070

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Two or three TPS92551 in parallel configuration.