TP4056-42-ESOP8

TP4056-42-ESOP8 is a 1 A linear lithium-battery charge-management IC from NanJing Top Power ASIC Corp. (Top Power) in 8-pin ESOP with exposed thermal pad — for single-cell 4.2 V charging from USB or adapter power: power banks, portable devices and battery cradles. The constant-current/constant-voltage algorithm with thermal regulation is the selection point: charge current stays at the programmed 1 A until the die heats, then folds back automatically — the classic "TP4056" charging core used on countless charger modules, here as the bare IC. Selection advice: the -42- suffix fixes the 4.2 V ±1% termination; the ESOP8 package with bottom thermal pad needs PCB copper spreading for full 1 A operation; the EMSOP8 variant is the smaller footprint option. This is the IC, not the finished module — module boards add the USB connector, LEDs and passives around this chip. Parameters verified against the Top Power TP4056 datasheet REV_2.3.