LT3650EDD-4.2#PBF

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LT3650EDD-4.2#PBF is a synchronous buck regulator with a dedicated Li-ion battery charging control. It\'s a device from Linear Technology Corporation that is built for battery management for portable applications. It is part of the PMIC (Power Management Integrated Circuits) family and specifically used as a Battery Charger.

The device is an Advanced Multi-Phase Synchronous Buck Regulator with a breakthrough architecture that enables many battery charging options. Its’ four-phase control architecture included with a low battery lockout feature allows for flexible current and voltage settings associated with many battery chemistries.

The LT3650EDD-4.2#PBF offers a powerful combination of features and capabilities designed for use in applications such as mobile phones, laptop computers, and other handheld battery-powered devices. It supports a wide input voltage range of 2V to 24V while also providing regulated output voltages of up to 20V. High switching frequencies up to 2MHz enable tight regulation and fast battery-charging times. The device also features a MOSFET driver output and can be programmed to support external power supplies with an enable/disable control feature.

The device operates with both constant-current constant-voltage (CC-CV) and Constant-Voltage Constant-Current (CV-CC) modes. In CC-CV mode, the charge current increases as the voltage across the input increases towards the set voltage. The current then reaches a saturation point as the voltage reaches the set voltage and remains constant at this level throughout the remainder of the charge cycle. In CV-CC mode, on the other hand, the charging current stays constant until the voltage reaches the set voltage level. The voltage then increases as the current decreases and the charging of the battery is terminated when the voltage and the current reaches their respective pre-programmed levels. The LT3650EDD-4.2#PBF has a low battery lockout feature that disables the charging cycle when a low battery voltage is detected.

Additionally, the LT3650EDD-4.2#PBF also features a programmable charge timer that allows it to turn off its charging sequence after a programmed period. Other features of the device include thermal protection, a system timer, constant frequency control, reverse current protection and a valid battery detection indicator.

All these features are integrated into a single chip that requires few external components, making the LT3650EDD-4.2#PBF an ideal choice for battery management in portable applications. Its high switching frequency also ensures accuracy and high efficiency, making it a useful tool for efficient charging of batteries.

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