LT1512IGN#PBF

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The LT1512IGN#PBF is a highly integrated thermally enhanced monolithic switch-mode battery charger for constant current / constant voltage charging of single cell Li-Ion batteries. It operates from an input voltage range of 4.5V to 20V and features a wide range of features, including low minimum input voltage, built-in POR, UVLO, thermal/reverse current protection, and additional features that make it suitable for a variety of applications.

The LT1512IGN#PBF comprises an integrated N-channel MOSFET, power switch, and gate driver. This integrated design enables higher efficiency over a wide range of input voltage, output current, and battery voltage, resulting in lower power consumption. The device’s switching frequency is adjustable, allowing it to achieve optimal efficiency in any application while keeping output ripple low. In addition, the device provides a programmable voltage limit, current limit, and termination charging current.

The device contains an internal synchronous rectifier circuit that facilitates fast current response and allows for low start-up current, which allows for optimal efficiency in the application. It also has a protection circuit that features a programmable thermal protection and reverse current protection. The device also features soft-start and a selectable sleep mode to further reduce power consumption.

The LT1512IGN#PBF is suitable for portable LED lighting, industrial LED lighting, and other portable applications that require a high efficiency, low power battery charger. It is also ideal for automotive and industrial electronics such as digital still cameras, portable media players, and smartphones, among many other applications.

The LT1512IGN#PBF’s working principle is based on the following steps. First, it utilizes the input voltage to power a synchronous rectifier circuit that controls the flow of current from the input capacitor to the battery terminals, ensuring a constant current is delivered to the battery. Once the charging current of the battery has reached the set current limit, the circuit will gradually reduce the voltage to the battery until it has reached the set voltage limit. The circuit will then reduce the charging current until it reaches the termination current. Finally, the output voltage will remain constant and the battery will be charged.

In conclusion, the LT1512IGN#PBF is an integrated thermally enhanced switch-mode battery charger suitable for a variety of applications that require high efficiency and optimal power consumption. It has a wide input voltage range, provides programmable voltage and current limits, and includes a protection circuit. The device’s working principle is based on a synchronous rectifier circuit that controls the flow of current to the battery, ensuring a constant current is delivered until the set voltage limit is reached.

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