TPS61196: Increase LED output current to 500mA by tying IFB pins together

Hi Sean,

Thank you for your advice.

Just to confirm, in my application we are sourcing current (from the diagram above).

Based from below info from datasheet, it can supply a minimum of 400mA

So in order to achieve, 500mA, we only need to combine two channels right?

Regards,

Ryan

Hi Ryan,

    No, thst for pulse current with 400mA, we only recommend for maximum 200mA for each channel so for 500mA, we recommend minimum 3 channels.

BR

Sean

Hi Sean,

I plan to drive 5 LED strings with each string containing 28 LEDs.

The current for each string are as below:

• LED String #1 = 310mA
• LED String #2 = 310mA
• LED String #3 = 400mA
• LED String #4 = 310mA
• LED String #5 = 310mA

Given this requirements, please help confirm that using part TPS61196 is not suitable in our design.

If yes, can you help advice another part that meets this requirement ?

Regards,

Ryan

Hi Ryan,

    I'm sorry that TPS61196 can't set the different full-scall current for each channel, and it is better not to set over 200mA for each channel, I would suggest with the solution with several TPS61196.

BR

Sean