Single-cell Li-Ion charger with integrated protection
The Texas Instruments BQ24064DRCR is a linear charger IC for single-cell Lithium-Ion or Lithium-Polymer battery packs. The input supply can range up to 16.5V, making it compatible with USB ports, 5V wall adapters, or higher-voltage sources like 9V or 12V supplies. Integrated fault protection covers over-temperature, over-voltage, and short-circuit conditions — the charger enters a safe state without external supervisory circuitry. A programmable timer controls the charge cycle duration, so the design does not rely on a host microcontroller to terminate charging.
Package and thermal design for the 1A charge rate
The BQ24064DRCR is supplied in a 10-VFDFN Exposed Pad package, also designated as 10-VSON (3x3 mm). At 1A charge current with a moderate input-to-battery voltage drop, the power dissipation can reach several hundred milliwatts; the thermal pad layout directly determines the junction temperature.
No official replacement or second-source alternate is listed for this exact order code. For dual-sourcing or supply resilience, the BQ24064 base product number (BQ24064) covers the family; any alternate would need to match the 10-VSON package and the 4.2V charge voltage target.