TP4056

The TP4056 is a popular single-cell lithium-ion (Li-ion) battery charger IC. It operates with a 4.5V–6.5V input (typically 5V USB) and provides a 1A max charging current (adjustable via an external resistor).
### Key Features:
- Linear charging with constant current (CC) and constant voltage (CV) phases.
- Auto-cutoff when the battery reaches 4.2V (prevents overcharging).
- Low standby current (~3µA) when unplugged.
- Charge status LEDs (red = charging, blue = full).
### Applications:
- Small electronics (e.g., DIY projects, portable devices).
- Single-cell 18650, LiPo, or Li-ion batteries.
### Limitations:
- No built-in reverse polarity protection (requires external circuit).
- No thermal regulation (can overheat at high currents).
A common module integrates the TP4056 with protection circuits (DW01A + FS8205) for overcharge, over-discharge, and short-circuit protection.
Summary: A simple, cost-effective charger for single-cell Li-ion batteries, best for low-power applications.

The TP4056 is a popular single-cell Li-ion battery charger IC. Equivalent alternatives include:
- MCP73831 (Microchip)
- BQ24040 (Texas Instruments)
- LTC4054 (Analog Devices)
- CN3065 (CONSONANCE)
- ETA4056 (ETA Semiconductor)
These chips offer similar features like 1A charging, thermal regulation, and charge termination. Some may vary in input voltage range, package, or additional protections. Always check datasheets for compatibility.

The TP4056 is a popular single-cell lithium-ion battery charger IC with the following key features:
- Input Voltage: 4.5V to 6.5V (USB-compatible).
- Charging Current: Adjustable up to 1000mA (default 1A with 1.2KΩ resistor).
- Charging Modes: Constant current (CC) and constant voltage (CV) for safe charging.
- Auto Cutoff: Stops charging when battery reaches 4.2V (±1% accuracy).
- Low Standby Current: ~25µA when charging is complete.
- Thermal Protection: Prevents overheating.
- Battery Reverse Polarity Protection: Safeguards against incorrect connections.
- LED Indicators: Shows charging (red) and full charge (green) status.
- Compact & Simple: Requires minimal external components.
Ideal for USB-powered devices like portable electronics, DIY projects, and small battery packs.

The TP4056 is a linear lithium-ion battery charger IC manufactured by Shenzhen Top Power Asic Corp. (often abbreviated as TOP Power).
TOP Power is a Chinese semiconductor company specializing in power management ICs, including battery chargers, DC-DC converters, and LDO regulators. The company is known for producing cost-effective, widely used components like the TP4056, commonly found in small electronics and DIY projects.
Their products are popular in budget-friendly and mass-market applications, though they may not always match the performance of higher-end brands. The TP4056, for example, is a basic but reliable single-cell Li-ion charger with overcharge protection.
For more details, check their official website or distributor datasheets.

The TP4056 is commonly available in SOP-8 (Small Outline Package) and MSOP-8 (Mini Small Outline Package) variants. These surface-mount packages are compact and suitable for PCB integration. Some versions may also include a DW01 protection IC and 8205A MOSFET in a single module, often sold as a pre-assembled charging board.