TPS92692-Q1: Bandwidth of IMON pin signal with a 1nF capacitor connected

user3726073

Part Number: TPS92692-Q1
Other Parts Discussed in Thread: TPS92692

I have a question regarding to the external capacitor connected to the IMON pin.

In the datasheet, it is said that IMON pin could "report the instantaneous status of LED current measured by the rail-to-rail current sense amplifier." Based on this information, if a 1nF is connected, whats the bandwidth of the signal of IMON pin?

If I want to do an precise sampleing of the IMON signal, do I need to change it into a smaller cap?

Best Regards,

Kevin

over 7 years ago

0 Tuan Tran74 over 7 years ago

TI__Mastermind 18890 points

Hi Kevin,

You can change IMON to 10pF for application. Remember that the the current feeding back to the TPS92692 has two 10 Ohms and 0.1uF filtering so this is the limitation of the BW.

0 Tuan Tran74 over 7 years ago in reply to Tuan Tran74

TI__Mastermind 18890 points

I have not heard back from you so I believe you may have solved the issue. Thread will close now but will reopen if you reply.

Thanks Tuan

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TPS92692-Q1: Bandwidth of IMON pin signal with a 1nF capacitor connected