The TP4056 is a single-cell 1 A linear lithium-ion battery charger with constant-current / constant-voltage regulation and programmable charge current.
Product Overview
The TP4056 is a complete constant-current / constant-voltage linear charger for single-cell Li-ion / Li-Po batteries. An internal MOSFET eliminates the need for an external sense resistor or blocking diode, and thermal feedback regulates charge current to limit die temperature. It terminates charging at C/10 and enters a low-current standby mode when the input is removed.
Newfly supplies verified, RoHS-compliant TP4056-class charger ICs with cross-reference and BOM-matching support for production sourcing.
Key Features
- – Single-cell Li-ion / Li-Po charging
- – Charges up to 1 A (programmable via a single resistor)
- – 4.2 V preset charge voltage (±1%)
- – Constant-current / constant-voltage (CC/CV) operation
- – No external MOSFET, sense resistor, or diode required
- – Trickle charge, auto-recharge, and C/10 termination
- – Thermal regulation and under-voltage lockout
- – ESOP-8 / SOP-8 package
- – RoHS-compliant
Technical Specifications
| Parameter | Specification |
|---|---|
| Battery Type | Single-cell Li-ion / Li-Po |
| Max Charge Current | 1 A (programmable) |
| Charge Voltage | 4.2 V ±1% |
| Input Voltage | 4 V – 6.5 V (verify with manufacturer datasheet) |
| Topology | Linear (CC/CV) |
| Termination | C/10 |
| Package | ESOP-8 / SOP-8 (verify variant) |
| Compliance | RoHS |
Applications
– Mobile devices and power banks
– Bluetooth / GPS peripherals
– Portable consumer electronics
– USB chargers and docks
– Wearables and small IoT devices
Why Choose Newfly Electronics
– Verified sourcing from ISO9001-certified manufacturers
– MOQ flexibility with small-quantity and prototype sourcing support
– Alternative-part and cross-reference service for battery charger ICs
– Full-board BOM sourcing to consolidate your component purchasing
– RoHS / REACH documentation support for compliance filing
FAQ
Q: What is the maximum charge current of the TP4056?
A: Up to 1 A, set externally with a single programming resistor.
Q: Does the TP4056 need an external MOSFET or diode?
A: No. The internal MOSFET and reverse-charge protection eliminate the need for external sense resistors or isolation diodes.
Q: Can you provide a cross-reference?
A: Yes. Share your BOM and Newfly will suggest compatible single-cell Li-ion charger ICs.
