-48V monitor

Patrick Chen

Mastermind 8875 points

Other Parts Discussed in Thread: INA226

Hello,

Do we have -48V monitor solution to meet below spec.? Thank you.

-48V/12A & 35A
Detect Current/ Voltage/ Watt
SPI interface

Patrick

over 7 years ago

0 Guang Zhou over 7 years ago

TI__Mastermind 27410 points

Hi Patrick,

We don’t have anything that satisfies all the requirements at the same time. We do have some that came close on one or more aspects. However all of them would require some kind of level shifting; voltage dividing and/or high side sensing (close to GND I assume).

Regards,

Guang-Apps CS Products

0 Jason Bridgmon over 7 years ago in reply to Guang Zhou

TI__Genius 14825 points

This solution does most of it, but uses an I2C compatible interface.

www.ti.com/.../TIDA-00313

0 Patrick Chen over 7 years ago in reply to Jason Bridgmon

Mastermind 8875 points

Thanks Jason

Could I know this reference design apply to -48V/12A are also suitable? Thank you.

BR
Patrick

0 Jason Bridgmon over 7 years ago in reply to Patrick Chen

TI__Genius 14825 points

With the right size of shunt resistor, you could support 12A with this solution quite well. A 1mOhm shunt would create a 12mV drop across the shunt to be sensed by the INA226, for instance. Setting up the shunt so that the largest voltage output you expect is still in the range of the INA226 inputs will get you the best resolution and work for your application.

Amplifiers

Amplifiers forum

-48V monitor