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. It delivers a programmable constant charge current up to 1A, with the charge termination voltage set internally to 4.2V. 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.