The low battery warning register BAT_LOW_WARN(0x0C, bit 2) and battery low shutdown register BAT_LOW_SHUT(0x0C, bit 3) (see Figure 8-2) also monitor the battery voltage (input supply). They warn for a low V_IN supply voltage or automatically shut down the DLPA3000 when the V_IN supply drops below a predefined level, respectively. The threshold levels for these fault conditions have hysteresis. This hysteresis depends on the selected threshold voltage and is depicted in Figure 8-3. It is recommended to set the low battery voltage higher than the undervoltage lock out such that a warning is generated before the device goes into shutdown.

Figure 8-2 Battery Voltage Monitoring

Figure 8-3 Hysteresis on V_{LOW_BAT} and V_UVLO