BQ21040DBVR TI Battery Chargers

The BQ21040DBVR is a highly integrated single-cell Li-Ion and Li-Polymer linear battery charger from Texas Instruments, designed for space‑constrained portable applications . Verify input voltage from 3.5V to 28V (absolute max 30V) with 6.6V overvoltage protection ; confirm charge current programmable up to 800mA via external resistor on ISET pin; note fixed 4.2V regulation voltage with ±1% accuracy . Observe operating temperature range from 0°C to 125°C and 125µA quiescent current . Features include dynamic power management, thermal regulation (125°C with 150°C thermal shutdown), 10‑hour safety timer, NTC thermistor monitoring for battery temperature sensing, and open‑drain status output for charging indication . Ideal for Bluetooth headphones, wearable devices, portable medical instruments, EPOS systems, low‑power handheld equipment, and USB‑powered consumer electronics requiring simple, standalone linear charging solutions . In stock at HL Electronics – request a quote for fast delivery.