AH8815 Datasheet | AnalogChipTech

FEATURES High Accuracy Voltage Detection Over-Voltage Protection o VOVP: 3.6V~4.35V (50m V/step) o Accuracy: ±25m V o Hysteresis voltage: 0V or 0.1V to 0.3V in 50m V/step Under-Voltage Protection o VUVP: 2.0V~3.0V (100m V/step) o Accuracy: ±80m V o Hysteresis voltage: 0V to 1V in 100m V/step 3-Levels Over-Current Detection Level-1 Over-Current Protection: o VOCP1: 25m V~350m V (25m V/step) o Accuracy: ±10m V Level-2 Over-Current Protection: o VOCP2=3- VOCP1 o Accuracy: ±30m V Short-Circuit Protection o VSCP=5- VOCP1 o Accuracy: ±50m V OC/SC release conditions: Charger-Connected OR Load-Opened Built-in Over-Temperature Protection Built-in Under-Temperature Protection Delay times are set by external capacitors Low-power Operating States: Normal State: < 30u A Standby State: < 3u A Power-down State: < 1u A Hardware Shut-down State: <0.1u A 16-Lead TSSOP Package GENERAL DESCRIPTION The AH8815 is a protection IC which includes highaccuracy voltage detector and current detector to provide Over-Voltage (OV), Under-Voltage (UV), Over-Current (OC), Short-Circuit (SC), Over Temperature (OT), Under-Temperature (UT) protection for 5-series Li-ion/polymer battery pack used in power-tools, notebook PC applications etc. The AH8815 provides a specific CTRL pin to control both charge and discharge FET. When CTRL is floating, the AH8815 will enter standby state to save power consumption. Under standby state, discharge FET is turned off while charge FET is turned on. When CTRL is tied to VCC pin, the AH8815 works in normal state, however, both charge and discharge FET are turned off. When CTRL is tied to VSS pin, the AH8815 works in normal state, the state of charge and discharge FET are decided according to safety events. The AH8815 integrates FET driver. The AH8815 can drive the N-type charge FET and N-type discharge FET at the PACK- side directly. The AH8815 consumes less than 30u A in normal state from VCC, and it reduces to less than 3u A in standby state and less than 1u A in power-down state....