ZSPM4521 Datasheet

© 2016 Integrated Device Technology, Inc.

13

January 27, 2016

2.2.

Fault Handling

2.2.1.

NFLT Pin Functionality

In the event of a battery over-voltage, the battery temperature being outside of the safe charging range, or the full

charge timer expiring, charging stops and the NFLT pin is pulled low. When the fault condition is no longer

present, the device will enter the INITIALIZE state (see Figure 2.2), but the NFLT pin will remain low until the

STATUS register (00HEX) is read (see Table 2.2). When the STATUS register is read, the NFLT pin will go high

until a new fault is detected.

2.2.2.

Other Faults

When an open thermistor, thermal shutdown, VIN under-voltage, or top-off time-out are detected, charging

immediately stops and the corresponding bit in the STATUS register (00HEX) is set. The device will enter the

INITIALIZE state until the fault is no longer detected.