Controller ground current

ANURAJ NK

Other Parts Discussed in Thread: TPS736

Hi,

Can you provide a brief information on the Ground pin current.What is it and reason for this current ? How/where it is measured?

Regards

Anuraj NK

over 7 years ago

0 David Baba over 7 years ago

TI__Mastermind 40120 points

Hello Anura,

In general terms, the Analog Gnd (AGnd) currents refer to the operating IQ currents of the device. you can measure this by placing a current meter in series with Vin of the device?

0 ANURAJ NK over 7 years ago in reply to David Baba

Intellectual 510 points

Hi,

Datasheet of TPS736 has Maximum Ground pin current of 550uA & 1000uA which is validated at Iout=10mA and Iout=400mA respectively. If I measure the Ground pin current in series to Vin, then it should be more than or equal to Iout currents. I.e 10mA or 400mA.

Please clarify. Below the datasheet spec. attached.

Regards

Anuraj NK

0 David Baba over 7 years ago in reply to ANURAJ NK

TI__Mastermind 40120 points

Rather than breaking the Ground connection from the Gnd pin to the Ground plane, I suggest you measure the input current and subtract the output current.

IGnd = Iin - Iout

You can do this by placing a current meter on the input and output to measure input and output currents respectively.

Hope this helps?

David.

0 ANURAJ NK over 7 years ago in reply to David Baba

Intellectual 510 points

OK Got it. Thanks

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Controller ground current