The BQ24061DRCR is a linear charger for 1-cell Lithium Ion or Polymer battery packs, with a maximum charge current of 1A. That 1A ceiling sets the charge-time floor for a given cell capacity — a 1000 mAh cell charges in roughly one hour at full current, assuming the input supply can deliver it. The constant-current phase is programmable via the ISET pin, so the same BOM can be tuned for smaller cells (500 mAh at 500 mA) without changing the charger IC.
Input supply range and protection
Supply voltage maxes at 16.5V, which covers USB (5V), common wall adapters (5V–12V), and even unregulated outputs from some 12V rails. The charger integrates over-voltage, over-temperature, and short-circuit protection — the over-voltage clamp alone saves the downstream cell if the adapter glitches above the 4.2V battery regulation point. The timer-based termination (programmable feature) provides a backup for end-of-charge detection if the current taper doesn't trigger.
Package and thermal reality for 1A charging
The 10-VSON (3x3 mm) with exposed pad is the thermal bottleneck. At 1A charge current with a 5V input and a 3.7V battery, the linear regulator drops 1.3V — that's 1.3W of heat.
Lifecycle and sourcing
For production BOMs, qualify the part against the 1A current ceiling and the thermal budget of the 10-VSON package.