The BQ76907 integrates Overcurrent in Charge Protection (OCC) using a comparator that monitors the differential voltage across the SRP - SRN pins and triggers an OCC alert or fault when the voltage exceeds a programmable threshold VOCC. The VOCC threshold is programmable from 3 mV to 123 mV in 2 mV steps using the Protections:Current:Overcurrent in Charge Protection Threshold configuration register (threshold = 2 mV × register value - 1 mV). The OCC protection is enabled using the Settings:Protection:Enabled Protections A:[OCC] configuration bit.

The OCC circuitry triggers an alert signal when an overcurrent in charge event is first detected, then triggers a fault if it persists for a programmable detection delay, OCC_DLY, which can be set as shown below.

The delay is set by the Protections:Current:Overcurrent in Charge Protection Delay configuration register.

When an OCC fault is triggered, the device turns off the CHG FET if configured for autonomous FET control when Settings:Protection:CHG FET Protections A[OCC] is set. The device recovers after a programmable delay given by Protections:Current:Recovery Time , which can be set from 1-sec to 255-sec in 1-sec steps. A recovery time setting of 0 disables autonomous recovery, in which case recovery only occurs when the PROT_RECOVERY() subcommand is sent from the host with the [OCCREC] bit set. Continual retrying of time-based recovery can be avoided by using the Current Protection Latch feature.