Single-cell Li-Ion/Polymer linear charger — 30 mA ceiling
The Texas Instruments BQ24901PWR is a linear charge-management IC for single-cell Lithium Ion or Lithium Polymer battery packs, delivering a programmable constant charge current up to 30 mA maximum. The charge voltage is fixed at 4.2V, matching the standard termination voltage for a single Li-Ion/Polymer cell. The IC integrates short-circuit protection and supports programmable charge current and timer via external components.
Obsolete — sourcing through independent distribution
The BQ24901PWR carries an Obsolete product status per the manufacturer. Availability is limited to surplus and broker-channel inventory.
14-TSSOP footprint and surface-mount assembly
The 0.65 mm pin pitch is standard for this package family and routes cleanly on a two-layer board with a solid ground plane under the charger section. Operating temperature range is -20°C to 85°C, suitable for consumer and industrial environments where the charger is not exposed to extreme cold or under-hood heat.