The BQ24083DRCR is a linear battery charger IC from Texas Instruments designed for single-cell Lithium Ion/Polymer packs with a 4.2V termination voltage. Its maximum charge current of 1A sets the charge-time floor for a given cell capacity — a 1000 mAh cell charges in roughly one hour at the 1A limit, assuming the upstream supply can deliver the current without dropping below the dropout threshold. The 6.5V maximum supply voltage means this part is a natural fit for 5V USB or regulated 5V rails, but not for unregulated 12V inputs — a 12V barrel jack would exceed the abs-max and require a switching pre-regulator or a different charger topology.
Programmable current and timer — no I2C, just resistor and capacitor
Charge current and safety timer are set with external passive components — a resistor from ISET to GND programs the constant-current magnitude, and a capacitor on TMR sets the charge-termination timeout. No digital interface, no firmware dependency; the charger operates standalone once the passives are populated. The operating junction temperature range spans 0°C to 125°C, which covers commercial and most industrial environments but not extended cold — below 0°C the charger may not start, and Li-ion charging below 0°C is typically disabled by the protection circuit anyway.
10-VFDFN exposed pad — thermal design is not optional
The 10-VFDFN package with exposed pad (3x3 mm VSON) requires a thermal land pattern on the PCB with multiple vias to an internal copper plane.
This means the part is still in regular production through the authorized TI channel, and there is no forced last-time-buy window or broker dependency for new designs.