DLPS052 October 2015 DLPA3000
Monitoring is also done on the battery voltage (input supply) by the low battery warning (BAT_LOW_WARN) and battery low shutdown (BAT_LOW_SHUT) (see Figure 3). They warn for a low VIN supply voltage or automatically shutdown the DLPA3000 when the VIN supply drops below a predefined level, respectively. The threshold levels for these fault conditions can be set from 3.9 V to 18.4 V by writing to registers 0x10<4:0> (LOWBATT) and 0x11<4:0> (BAT_LOW_SHUT_UVLO). These threshold levels have hysteresis. This hysteresis depends on the selected threshold voltage and is depicted in Figure 4. It is recommended to set the low battery voltage higher than the under voltage lock out such that a warning is generated before the device goes into shutdown.