MAX14747EWA+

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The MAX14747EWA+ is a battery charger PMIC for automotive and industrial applications developed by Maxim Integrated. It provides charging and battery management for single cell lithium-ion (Li-Ion) batteries, using constant-voltage/constant-current (CV/CC) topology. Its efficient power path design and ability to handle up to 20A of charging current make it well suited for automotive battery systems.

The MAX14747EWA+ is based on a buck-boost topology and has three input voltage sources: two separate input DC-DC converters, each configurable for a different output voltage, and a wide-range input buck converter. It is designed to charge the battery and provide system power simultaneously. A power-fail detect circuit monitors the output voltage of the system and can protect against undervolages or short-circuits.

The MAX14747EWA+ provides a high level of safety, with integrated overcurrent protection, overvoltage protection, thermal shutdown, battery-over-temperature protection, and cell UVLO threshold. It also offers diagnostics capability, allowing for detection of faults such as overcurrent, overvoltage, and excessive temperature. The MAX14747EWA+ is designed to meet automotive requirements and supports an operating temperature range of -40°C to +125°C.

The MAX14747EWA+can operate with up to 5A or up to 20A of charging current, depending on the input selection and the battery size. The current limit is set by an internal resistor, so the user can adjust the current to match the system requirements. The MAX14747EWA+ also has an adjustable voltage reference. The default voltage is 4.2V with a range of 2.8V to 4.5V. The charger can be used for charging any type of Li-Ion battery, from small cells up to large capacity batteries.

The MAX14747EWA+ includes a high-efficiency constant-voltage/constant-current topology that operates with input voltages from 3.2V to 22V. Its low quiescent current, low dropout voltage, and switching frequency of up to 1MHz make it very efficient. It also supports a flexible voltage setting, so the user can adjust the charging voltage to ensure optimal performance.

The MAX14747EWA+ features an automatic switchover between charging and standby modes. In standby mode, all charging related components are powered down and the battery is monitored by the device\'s control logic. This logic can detect faults such as overvoltage, overcurrent, and over temperature, and will shutdown the charger if necessary.

The MAX14747EWA+ has a built-in coulomb counter, allowing the user to monitor the current flowing into and out of the battery. The coulomb counter can be used to prevent the battery from overcharging or discharging beyond a certain level. The MAX14747EWA+ also includes an integrated 32-bit MCU, which can provide additional functions such as remote control, communication interfaces, and user-defined algorithms.

The MAX14747EWA+ is ideal for applications that require a highly efficient, robust, and versatile charger for automotive and industrial applications. It supports a wide range of input voltages and current levels, so it can be used for charging almost any type of Li-Ion battery. The integrated safety and diagnostics features, combined with its low quiescent current and high efficiency, make it well suited for automotive applications.

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