LTC4120IUD

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The LTC4120IUD is a two-cell Unidirectional Synchronous Step-Down Battery Charger, which is a member of the PMIC - Battery Chargers family. The LTC4120IUD is designed for high-efficiency, high-speed charging of mobile devices, laptops and other portable equipment. It boasts an integrated synchronous, low on-resistance MOSFET, voltage regulation and current regulation. The ability to pass through the charge from the battery and to regulate voltage, current and temperature makes the LTC4120IUD a versatile and reliable device for portable applications.

The device features a wide range of features, starting from its ability to support both 6- and 9-cell battery packs to its fast charge rate of up to 5A and its low power consumption at 0.2mA. Its wide input voltage range of 3V to 30V allows the device to charge from both mains and automotive power sources. To ensure safety, it includes current and thermal protection, while its green and orange LEDs makes monitoring battery charging status easier. Furthermore, the device is available in an array of packages, including low profile surface mount package that is suited for portable applications.

The LTC4120IUD operates as an autonomous step-down charger, automatically regulating its output voltage in order to maintain optimal charging current and charge level. The device’s architecture consists of four main components: a reference voltage, an error amplifier, a current sensing and regulation circuit, and a voltage level adjustment circuit. The reference voltage sets the desired output voltage for the charging cycle and serves as the basis for the control loop. The error amplifier is responsible for comparing the actual output voltage to the reference voltage and for providing a voltage control signal. The current sensing and regulation circuit then adjusts the charging current by modulating the duty cycle of the synchronous MOSFET in response to the control signals from the error amplifier. Finally, the voltage level adjustment circuit allows the user to adjust the voltage level of the battery charger according to the type of battery pack being used.

In addition to its autonomous control capability, the LTC4120IUD can be connected to a microprocessor-based system to provide an intelligent battery charging solution. It has two digital hosts pins that can be used to receive charge information and to communicate with a microprocessor, allowing the MCU to adjust the output voltage, current and safety parameters as necessary. This allows for more precise and safer charging policies.

The LTC4120IUD is an ideal choice for applications requiring a robust battery charger with a wide range of features. Its wide input voltage range, low battery current sensing and low power consumption make it suitable for mobile devices, laptops and other portable equipment, making it the perfect platform for the next generation of portable products.

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