TP4056

TP4056 is the UMW (UTD Semiconductor) single-cell lithium-ion linear charge-management IC in ESOP-8. The bare designation is the maker’s own ordering code: UMW’s ordering table writes TP4056 word-for-word, on tape at 4,000 pieces, so no suffix is missing from this page’s title. UMW publishes no lifecycle grading for the part; the code stands in the maker’s current datasheet ordering table. Every figure on this page is UMW’s own: a float voltage of 4.200 V typical, held between 4.158 V and 4.242 V, an input of 4.5 V to 6.5 V, charge current set by the RISET resistor — 500 mA with 2 kΩ and 100 mA with 10 kΩ — a trickle-charge threshold of 2.9 V and a standby current of 50 µA. The selection point is the complete one-chip charger: constant-current/constant-voltage control, charge termination and status indication for a single cell in handheld instruments and standby-powered devices, with the ESOP-8 exposed pad carrying the heat. Selection advice: TP4056-designated parts come from several makers with different float-voltage tolerances and current ranges — the Top Power codes also listed in this catalog are different devices again — and the termination accuracy of a lithium charger is a safety-relevant figure, so qualify this UMW code against the UMW document and state the maker in the RFQ. Parameters verified against the UMW TP4056 datasheet (ordering information and electrical characteristics).