MAX1898EUB42+

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Power management integrated circuits (PMIC) allow efficient control of the power supply and distribute the power throughout different components. This helps prevent power loss and enhances the performance of the system. Battery chargers are an important type of PMIC and they handle the charge and discharge cycle of a battery to improve the longevity of the battery. The MAX1898EUB42+ is a high efficiency, fast charge, synchronous step-down regulator with charger circuit design. It includes two PMICs. The first is a constant- current/constant voltage (CC/CV) charger, which is used for charging the battery. The second is a synchronous buck regulator, which is used for providing a regulated voltage to the load.

The MAX1898EUB42+ supports Li-ion battery systems with up to four cells. It features a CC/CV charging process with recharge, top-off and sleep modes. The CC/CV charger includes battery temperature monitoring and charge status monitoring to ensure safe and accurate charging. The device has an integrated synchronous buck converter that can provide a regulated voltage to the system, up to 5A. It offers programmable voltage output and system protection features.

The MAX1898EUB42+ offers high efficiency in its CC/CV charger and buck converter, with over 90% efficiency for most of the operating range. It uses a “powered-down” architecture that helps reduce the ground pin current which helps to reduce system power consumption.

The MAX1898EUB42+ is suited for a wide range of applications, including notebook/tablet/ultrabook systems, battery-powered devices and portable medical equipment. It also offers excellent performance in mobile communication equipment and high-end applications, such as in-vehicle infotainment systems.

The MAX1898EUB42+ works by first conducting a CC/CV charging cycle. During the constant-current phase, the battery is charged at a preset rate of current. During the constant-voltage phase, the battery is charged at a preset voltage. This allows the battery to be charged quickly and efficiently.

The synchronous buck converter then takes over and provides a regulated output voltage to the load. The converter operates in PWM mode, switching to generate the required output voltage. It includes system protection features, including under-voltage lockout, output current limiting, over-voltage protection, and temperature monitoring.

In summary, the MAX1898EUB42+ is a powerful PMIC for battery charge and discharge management. It provides efficient control of the charge and discharge cycle for Li-ion battery systems. Its high efficiency and wide range of system protection features make it suitable for a range of applications, including notebook/tablet/ultrabook systems, battery-powered devices and portable medical equipment.

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