LM3655TL/NOPB

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The LM3655TL/NOPB is a member of the Power Management Integrated Circuit (PMIC) family which specializes in battery charging. This device is a buck-boost charge controller which has the ability to quickly and safely charge a wide variety of battery chemistries, including Lithium-ion, Nickel-Metal Hydride (NiMH) and Lead Acid. It is widely used in consumer electronic devices such as tablets, smart phones and wearables.

The LM3655TL/NOPB is a cost-effective solution for battery charging in consumer electronic applications and provides many of the features required for a complete charging system. It is optimized for short-circuit protection and fault tolerance.

The LM3655TL/NOPB has a wide input voltage range of 4.5V to 28V, making it suitable for charging a wide range of battery chemistries. The device automatically detects the battery type, allowing it to optimize the charging process. It can also be used to safely test and balance battery cells. With its compact 5mm x 5mm size, it is also suitable for applications where board space is limited.

The device is also designed with protection and fault tolerance in mind. It provides protection against over-voltage, over-temperature, short-circuit and reverse polarity. It also has an open-drain charging status pin, allowing it to communicate with an external controller or monitor to indicate the current state of the charging process. The device also includes a Soft-Start feature which helps reduce startup current surges and ensures a steady charging current.

The working principle of the LM3655TL/NOPB is a simple two-step process. First, it monitors the current battery voltage and assesses the charge requirements. Then, it switches the appropriate MOSFET for the selected charging voltage or current. The device will automatically reduce or shutdown the charge current if the battery temperature is detected to be outside the specified operating range. During the charging process, the device continuously measures and monitors the current battery voltage to ensure the charge current is maintained at the required maximum and minimum levels.

The LM3655TL/NOPB is an ideal solution for battery charging in consumer electronic devices. It is cost-effective, feature-rich and easy to use. It provides protection against over-voltage, over-temperature, reverse polarity and short-circuit. With its wide input voltage range and soft-start feature, it ensures the safe charging of a wide range of battery chemistries. It can also be used to monitor the charging process and provide information to an external controller or monitor.

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