Multi-chemistry charge controller in 8-TSSOP
The BQ24401PWRG4 from Texas Instruments is a multi-chemistry battery charge controller IC, meaning it can be configured for lead-acid, NiCd, or NiMH chemistries without a hardware change — the timer-based charge termination (Programmable Features: Timer) sets the charge duration, and the external pass transistor handles the current path. Housed in an 8-TSSOP package (0.173", 4.40mm width) with surface-mount mounting, it fits into compact PCB layouts typical of portable equipment, backup power systems, and embedded chargers. The supply voltage maximum is 6V, so the IC itself runs from a regulated 5V rail or a single Li-ion cell — the external pass transistor and supply rail handle the higher battery-charge voltage.
The operating temperature range is -20°C to 70°C (TA) — this covers most indoor and commercial equipment environments but not extended industrial or automotive under-hood duty.