LM3658SD

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Li-Ion and Li-Pol batteries have become increasingly common for powering mobile electronic devices such as cell phones, digital cameras, and portable music players. The LM3658SD is a highly integrated, monolithic charge management and power conversion IC designed to manage and convert the charging of Li-ion and Li-Pol batteries. It features high integration, high efficiency, and low quiescent current operation.

The LM3658SD is a multi-mode device that includes an adjustable current and voltage charge management, as well as a buck-boost mode allowing for autonomous charging and protection of Li-ion/Li-Pol batteries. The LM3658SD can be used in several applications including battery powered products and systems, ultra-portable systems, and handheld devices, and low-power metal-oxide-semiconductor field-effect transistor (MOSFET) drive systems.

The LM3658SD is designed to provide high performance and robustness of operation, and achieves a high level of integration by integrating over 25 components. The device incorporates four integrated circuit (IC) devices, including a low-dropout voltage regulator, a 2A synchronous buck regulator, a 2A non-synchronous boost regulator, and a 2A non-synchronous buck regulator. Two independent synchronous step-down converters are also included for charging applications. These devices have a high integration level and can support a wide range of battery capacities and types, as well as several charging algorithms.

The LM3658SD includes a charge controller and power converter with integrated power MOSFETs in a single device. The inter-related power MOSFETs provide a low-ripple charge current and a high-efficiency power conversion stage. The device also has the ability to monitor the battery voltage, current, and temperature, so that it can accurately determine the charging state, range and duration of the battery. It can also detect abnormal conditions, such as over-charging, discharging, or thermal protection, and take appropriate action to protect the battery.

The LM3658SD supports several different charging algorithms. It can be used for linear charging, pulse width modulation (PWM) charging, and timed charging. It also supports several charging implementation options, such as independent cycle charging, pre-conditioning, and trickle charging. It also includes user programmable features, such as an adjustable input current limit, an adjustable charge current limit, an adjustable charge voltage, and an adjustable termination current limit.

The LM3658SD is an excellent choice for Li-ion and Li-Pol battery charging applications. It supports a wide range of battery types and capacities, and provides efficient power conversion, low quiescent current operation, and robust power management. It also provides protection against abnormal conditions, and offers flexible charging algorithms for efficient charging. The high integration level and the versatile feature set of the LM3658SD make it an ideal solution for mobile electronic device battery charging.

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