BQ2971

BQ2970, BQ2971, BQ2972, BQ2973 SLUSBU9H – MARCH 2014 – REVISED JUNE 2021 BQ297xx Cost-Effective Voltage and Current Protection Integrated Circuit for SingleCell Li-Ion and Li-Polymer Batteries 1 Features Input voltage range pack+: VSS – 0.3 V to 12 V FET drive: – CHG and DSG FET drive output Voltage sensing across external FETs for overcurrent protection (OCP) is within ±5 mV (typical) Fault detection – Overcharge detection (OVP) – Over-discharge detection (UVP) – Charge overcurrent detection (OCC) – Discharge overcurrent detection (OCD) – Load short-circuit detection (SCP) Zero voltage charging for depleted battery Factory programmed fault protection thresholds – Fault detection voltage thresholds – Fault trigger timers – Fault recovery timers Modes of operation without battery charger enabled – NORMAL mode ICC = 4 µA – Shutdown Iq = 100 nA Operating temperature range TA = –40°C to +85°C Package: – 6-pin DSE (1.50 mm × 1.50 mm × 0.75 mm) PACK + NC COUT DOUT 2. 2 k V– BAT VSS 330 CELLP CELLN PACK– S D S CHG DSG Simplified Schematic 0.1 µF OCD Detection Accuracy (mV) 2 Applications Tablet PCs Mobile handsets Handheld data terminals 3 Description The BQ2970 battery cell protection device provides an accurate monitor and trigger threshold for overcurrent protection during high discharge/charge current operation or battery overcharge conditions. The BQ2970 device provides the protection functions for Li-ion/Li-polymer cells, and monitors a...