MAX77651BEWVA+T

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The MAX77651BEWVA+T is a power management integrated circuit, or PMIC, that includes a battery charger that provides simultaneous power management for a single cell Li-Ion/Li-Polymer battery and load regulation for up to two separate output voltages from a single integrated IC. This makes it ideal for applications such as automotive body control modules, portable consumer electronics, wearables, and medical devices.

The MAX77651BEWVA+T offers a wide range of features, including 2 Constant-Voltage (CV)/Constant-Current (CC) channels, 4-pin dual-mode programmable charge current, 4-pin dual-mode float voltage, short circuit protection, and overvoltage protection. It also supports automatic input current limiting and adjustable charge current to ensure the fastest charging time is achieved. The high-side MOSFET drive provides up to 5A of load current, while the low-side drive offers up to 3A. The MAX77651BEWVA+T also has an integrated low-dropout regulator with a 600mA maximum output current.

The MAX77651BEWVA+T is a flexible solution for battery charging applications due to its wide-ranging features and supported output voltages. It supports CV/CC and TC or dual-mode programmable charging for both Li-Ion and Li-Polymer single-cell batteries, with a typical charge current of 0.1 to 2C, and an adjustable float voltage that can be set from 3.0V to 4.33V. This allows it to be used to optimize charging times in a variety of applications.

The MAX77651BEWVA+T uses the industry-standard CC/CV charging algorithm for accurate battery charging. This algorithm monitors the battery voltage and current to determine the state of charge (SOC). When charging, the regulated output voltage from the charger is adjusted to maintain a constant current until the battery reaches its full charge voltage. The battery is then switched to float voltage which is typically slightly lower than the full-charge voltage to prevent overcharging and limit cell aging.

The MAX77651BEWVA+T includes several protection circuits to help safeguard against harmful conditions such as overvoltage and undervoltage, overcurrent and short circuits, and over temperature. The charger also has a watchdog timer which can be programmed to periodically monitor the system and reset if the voltage exceeds a predetermined threshold.

The MAX77651BEWVA+T is an integrated PMIC with a battery charger designed specifically for automotive body control modules, portable consumer electronics, wearables, and medical devices. It is capable of providing simultaneous power and load regulation for up to two separate output voltages from a single integrated IC, and offers a wide range of features and protection circuits.

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