Reverse common source MOSFETs?

Zhang Hui

Other Parts Discussed in Thread: BQ24616

For the bq24616 IC, can we reverse the MOSFETs have their drains connected (due to an error made in board routing), and still make it work? Would this introduce anything undesirable at all?

Hui

over 10 years ago

0 Smriti B over 10 years ago

TI__Expert 5565 points

The common source approach eliminates the need for two diodes - one diode for negative voltage input, and another diode to provide a path from battery to VCC during battery operation. If the P-FETs were in common drain configuration, then you would add have to add these two extra diodes for the same functionality.

0 Zhang Hui over 10 years ago in reply to Smriti B

Intellectual 625 points

Thanks for great answer!

Power management

Power management forum

Reverse common source MOSFETs?