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Question asked by Bo XU on Feb 22, 2019
Latest reply on Feb 24, 2019 by G.w. Sun

Does anybody knows how should I get the Power Supply voltage to UJA1132 in a system with more than 20V.


The chip type number is UJA1132HW/5V0. It has two pins to detect battery voltage BAT and BATSENSE, the max voltage it can detect is 20V in the datasheet.

if I use UJA1132 in a 24V system, how should I get the battery voltage.

1) Using resister dividing network and connecting to BATSENSE will causevoltage sensor error.

2) Should I use resister dividing network and also a follower circuit(with an operational amplifier). Will this method can solve the problem.

3) Is there any other good solutions?