TPS568230: Feedback Loop Connection for Shunt sense

Muhammed Naseef M k

Part Number: TPS568230

In order to remove voltage drop across the shunt sense resistor, Can I take feedback loop connection from the right side of shunt? , Does this connection cause any stability issue?

over 5 years ago

0 Yuchang Zhang over 5 years ago

TI__Mastermind 18510 points

Hi, Generally we don’t recommend to use like this. Not sure the sense circuit will impact the loop or not. If you worry the drop across the shunt, you can make the Vout a little higher.

And by the way, the boot cap you select is too small, please change reference value 0.1uF.

Yuchang

0 Yuchang Zhang over 5 years ago in reply to Yuchang Zhang

TI__Mastermind 18510 points

And add two more comments

1, Mode pin should be divided from VCC.

2, Reserve A 47pf CFF cap parallel with the upper feedback resistor.

Yuchang

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TPS568230: Feedback Loop Connection for Shunt sense