BQ24075: bq24075

saurabh borkar

Part Number: BQ24075

Hello,

I am using bq24075 BMS IC. As per datasheet, I have connect all resistor and capacitor to bq24075. I have also connect 100k resistor to battery terminal with respect to ground(THRM,NTC).

But when sysoff pin is connect to high, output is not go to 0V. So please provide solution on it.

over 4 years ago

0 Anthony P Pham over 4 years ago

TI__Mastermind 23410 points

Hi Saurabh,

When the SYSOFF pin is high and there is a sufficient voltage at the IN pin, this will disconnect the battery from the system and stop charging. This will not turn the OUT voltage off.

0 saurabh borkar over 4 years ago in reply to Anthony P Pham

Prodigy 30 points

Hello Sir,

We are not using USB/charging adaptor on the IN pin of bq24075. We are using only 3.7v Li-ion battery supply.

As per datasheet SYSOFF pin function : System Enable Input. Connect SYSOFF high to turn off the FET connecting the battery to the system output. When an adapter is connected, charging is also disabled. Connect SYSOFF low for normal operation. SYSOFF is internally pulled up to VBAT through a large resistor (approximately 5 MΩ). Do not leave SYSOFF unconnected to ensure proper operation.

So, if we are connecting SYSOFF to high then at the OUT pin of bq24075 must be 0 volt.

0 Anthony P Pham over 4 years ago in reply to saurabh borkar

TI__Mastermind 23410 points

Hi Saurabh,

You'll need a few other components to achieve what you are attempting. Please reach out to me offline regarding this matter at a-pham@ti.com.

I will close this thread.

0 saurabh borkar over 4 years ago in reply to Anthony P Pham

Prodigy 30 points

OK sir.

Power management

Power management forum

BQ24075: bq24075