NanJing TopPower Components

Heavily — few power ICs are cloned as aggressively. Fake TP4056 dies use undersized pass elements that overheat above ~500 mA, terminate charging prematurely (undercharging cells), lack proper thermal foldback, or omit the safety timer. We verify lots by running full charge cycles on samples: confirm the PROG-pin sets exactly 1 A with a 1.2 kΩ resistor, check CV termination at 4.2 V ±1%, verify charge-status pin transitions, and thermally image the die at full load. All stock ships from TopPower authorized distribution with lot codes.

The module mounts a TP4056 (SOP-8) plus supporting parts on a small PCB: USB-C or micro-USB input, a 1.2 kΩ PROG resistor (1 A default), charge-status LEDs, and — on the protected version — a DW01A + FS8205 battery protection circuit (overcharge, over-discharge, short-circuit). The bare chip needs your own PCB design. For production we supply both; for prototyping, the protected module is the safer and faster choice.

No — the TP4056 is a single-cell Li-ion/Li-poly charger with 4.2 V CV regulation. LiFePO4 needs 3.6 V CV; multi-cell packs (2S+) need a different topology entirely (see TP-series multi-cell chargers or buck-boost charging ICs). Also note it is a linear charger: at 5 V input charging at 1 A, the die dissipates up to ~0.8-1 W, so keep the SOP-8 thermal pad well soldered to copper. For higher currents or efficiency, a switching charger is the right tool.

Yes — Nanjing TopPower ASIC Corp has designed power management ICs since 2004, and the TP4056 is an original TopPower design that became the de facto industry standard for single-cell linear charging. Authorized domestic distribution delivers in 1-2 weeks; our Shenzhen warehouse holds TP4056 chips and modules for 1-3 day shipment, with the authorized-channel C-of-C available on request.