MCP73871-1CCI/ML

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The MCP73871-1CCI/ML is a new type of Power Management IC (PMIC) developed by the Microchip Technology Corporation. It is specifically designed to provide a complete solution for single-cell, Li-Ion or Li-Polymer battery charging applications. It integrates all the necessary components required to support a wide range of battery chargers, such as input current and voltage regulation, charge current control, charge status monitoring and status verification. This highly integrated PMIC offers high efficiency and low power dissipation, making it ideal for small form factor and portable applications. This article will discuss the application fields and working principle of the MCP73871-1CCI/ML.

The MCP73871-1CCI/ML is a PMIC-Battery Chargers, designed for single-cell, Li-Ion or Li-Polymer battery packs used in consumer and industrial applications. It is well suited for portable application such as mobile phones, digital cameras, PDAs and other portable electronic devices. In these types of applications, the device can be used to rapidly charge and balance a single-cell lithium ion or lithium polymer battery. The device features a power-on reset and under-voltage lockout, watchdog timer, and adjustable low-battery detect circuitry. It also supports pre-charging, charge current monitoring, charge status output, temperature monitoring, and end-of-charge (CV / DAC) sensing. The device is highly optimized for use in single-cell applications, allowing the designer to easily implement a complete charging solution.

The MCP73871-1CCI/ML provides an adjustable constant current (CC) output which is programmable through a resistive divider. It also provides an adjustable minimum charge current, with a range of 0.2-2A, while its maximum charge current is limited to 1.0A. The device features two analog inputs for external monitoring of the battery temperature and the input current, and a digital input for charging direction. It also offers two independent logic signals for charge status and safety enable.

In terms of operation, the MCP73871-1CCI/ML uses a constant-current/constant-voltage (CC/CV) charge algorithm to accurately control the charging process. The device also offers a programmable current regulation loop with a minimum 0.02V regulation accuracy. In addition, the device features two-state charging, where the CC state is used for fast charging and the CV state is used for maintaining the charge. During the CC state, the device monitors the battery voltage, and if an over-voltage condition is detected, the CV state will be initiated and charging will be terminated.

The MCP73871-1CCI/ML also offers a variety of safety features that help protect against incorrect charge conditions. These include over-voltage protection, over-temperature protection, battery overcharge protection, and under-voltage protection. The device also includes a voltage regulator that is controlled by a logic input, allowing the system to choose between a regulated output or the battery voltage.

Overall, the MCP73871-1CCI/ML is a highly-integrated and cost effective PMIC designed for single-cell Li-Ion or Li-Polymer battery charging applications. Its features, such as its adjustable constant current output, two-state operation, and safety features, make it suitable for a wide range of portable applications, including mobile phones, digital cameras, PDAs, and other portable electronic devices.

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