JAJSCB2K April 2020 – July 2020 BQ77904 , BQ77905
PRODUCTION DATA
An OTC Fault occurs when the temperature increases such that the voltage across an NTC thermistor goes below the OTC voltage threshold, VOTC. CHG is turned off if the fault condition lasts for an OTC delay time, tOTC_DELAY. The state comparator is turned on when CHG is turned off. If a discharge current is detected, the device immediately switches the CHG back on. The response time of the state comparator is typically in 700 µs and should not pose any disturbance in the discharge event. The OTC fault recovers when the voltage across thermistor gets above OTC recovery threshold, VOTC_REC, for OTC delay time.