BQ21040

Product Folder Order Now Technical Documents Tools & Software Support & Community bq21040 SLUSCE2D – APRIL 2016 – REVISED JANUARY 2019 bq21040 0.8-A, Single-Input, Single Cell Li-Ion and Li-Pol Battery Charger 1 Features 1 Charging – 1% Charge Voltage Accuracy – 10% Charge Current Accuracy – Low Battery Leakage Current (1 µA) – Programmable Charge Current using External Resistor up to 800 mA – 4.2-V Li-Ion and Li-Pol Charger Protection – 30-V Input Rating; with 6.6-V Input Overvoltage Protection – Input Voltage Dynamic Power Management – 125°C Thermal Regulation; 150°C Thermal Shutdown Protection – OUT Short-Circuit Protection and ISET Short Detection – Overtemperature Sensing Protection Through NTC – Fixed 10-Hour Safety Timer System – Status Indication – Charging/Done – Available in Small SOT-23 Package 2 Applications EPOS Medical Endoscopes BLE Speaker and Headsets Low-Power Handheld Devices 3 Description The bq21040 device is a highly integrated Li-Ion and Li-Pol linear battery charger device targeted at spacelimited portable applications. The device operates from either a USB port or AC adapter. The high input voltage range with input overvoltage protection supports low-cost unregulated adapters. The bq21040 has a single power output that charges the battery. A system load can be placed in parallel with the battery as long as the average system load does not keep the battery from charging fully during the 10 hour safety timer. The battery is charged i...