The TP4056 is a compact, linear CC/CV charger IC tailored for single-cell lithium‑ion/polymer batteries. With just a few external components, it supports USB-powered charging, integrates thermal regulation, and provides automatic recharge after the battery drops below a threshold. Combined with a protection IC, this module offers full charge/discharge safeguarding.
Features:
Charges single-cell Li‑ion batteries at up to 1 A (programmable via R_PROG)
Built-in thermal feedback to prevent overheating during charge
Automatic recharge once battery voltage drops below ~4 V
Dual‑LED indicators: red for charging, green when full
Integrated DW01A + FS8205A chip set for overcharge/overdischarge/overcurrent/short‑circuit protection
Supports “trickle charge” mode for deeply depleted cells (< 2.9 V)
Low standby current (< 1 µA) when input is removed
