CL4056H

Introduction to CL4056H
CL4056H is a single-cell lithium-ion battery charging IC designed for portable devices. It features a linear charging circuit with constant current and constant voltage (CC/CV) control, ensuring safe and efficient charging. Key specifications include:
- Input Voltage: 4.5V–6V (USB-compatible).
- Charging Current: Up to 1A (adjustable via external resistor).
- Termination: Auto-cutoff at full charge (4.2V ±1%).
- Protections: Overvoltage, overcurrent, and thermal shutdown.
Compact and cost-effective, it integrates reverse polarity protection and low standby current, making it ideal for space-constrained applications like wearables and IoT devices.

The CL4056H is a lithium battery charging IC. Equivalent alternatives include:
- TP4056 (common, widely available)
- DW01 (protection circuit combo)
- MCP73831 (Microchip alternative)
- BQ24075 (TI equivalent)
- LTC4054 (Linear Tech option)
These chips offer similar 1A linear charging with overcharge protection. Check datasheets for exact pin compatibility and specs.

The CL4056H is a compact, single-cell Li-ion/Li-Po battery charging IC with the following key features:
- Input Voltage: 4.5V to 6V (USB-compatible).
- Charging Current: Adjustable up to 1A (default 1A).
- Charge Termination: Auto-cutoff at 4.2V (±1%) with precision voltage regulation.
- Protections: Overvoltage, overcurrent, short-circuit, and reverse polarity protection.
- Thermal Regulation: Reduces current if temperature exceeds ~110°C.
- Status Indicators: Dual LEDs for charging (red) and full charge (green).
- Standby Current: Low (~2μA) when not charging.
- Package: SOP-8 (small footprint).
Ideal for portable devices, it supports USB or adapter power with minimal external components.

The CL4056H is typically available in a SOP-8 (Small Outline Package) or ESOP-8 (Exposed Pad SOP) package. These compact surface-mount packages are suitable for space-constrained applications, with the ESOP-8 variant offering better thermal dissipation due to its exposed pad. Check the datasheet for exact dimensions and specifications.