TPS61311: INDLED drive circuit

Patrick Chen

Part Number: TPS61311

Hello,

Could I know INDLED can be used to control pin Hi/Lo for below circuit? UFCAM_LED# net connect to LED_Control net.. Thank you.

BR
Patrick

over 7 years ago

0 Greg Lubarsky over 7 years ago

TI__Intellectual 1940 points

Hello,

If I understand your question correctly, you want to use the indicator driver as a logic controller. I think this should be possible. When the current source is disabled it should go high impedance so I am guessing you are using the resistors and FETs to handle the on and off states appropriately. Is that correct? Have you ordered an evaluation board for this device to prove the concept?

Greg

0 Patrick Chen over 7 years ago in reply to Greg Lubarsky

Mastermind 8875 points

Hello Greg,

it is correct to handle the on and off states. Has any concern for this circuit or INLED source/sink current concern? Can INLED be disable for high impedance? Thank you.

BR
Patrick

0 Greg Lubarsky over 7 years ago in reply to Patrick Chen

TI__Intellectual 1940 points

Hello,

I do believe the output goes to a high impedance state when off. If it was not high impedance, some current could flow and the LED would light up in the typical application and this this not the desired function.

Greg

Power management

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TPS61311: INDLED drive circuit