LTC4012CUF#TRPBF

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Product Overview: The LTC4012CUF#TRPBF is a flexible general-purpose, linear battery charger and power management device from Linear Technology Corporation. It is composed of a buck-boost regulator, a three-stage Li-ion battery charger, and several regulators with advanced safety features.

The LTC4012CUF#TRPBF is designed specifically for Li-ion batteries, allowing the battery to remain overcharged or discharged safely under conditions of over-voltage, over-current, short-circuit and over-temperature conditions. Its integrated buck-boost regulator provides up to 4A, PWM/PFM mode and adjustable output voltage from 1.2V to 5.5V. The charger can operate in constant current/constant voltage (CC/CV) and pulse width modulation (PWM) modes. The device also includes power limiting, automatic power-up, and thermal regulation for system safety.

Application field

The LTC4012CUF#TRPBF from Linear Technology is ideal for a wide range of applications including DSLR cameras, digital still cameras, smartphones, tablets, and medical and industrial equipment. The device is designed to be flexible and highly integrated, enabling designers to create cost-effective, small form-factor products that are optimized for battery charging and power management.

The device is ideal for embedded and portable products, where space and power draw are important factors. Its 4A output current capacity makes it suitable for high-end portable devices and products with a wide input voltage range. The device also offers advanced safety features like Input supply errors protection and over-temperature protection.

Working Principle

The LTC4012CUF#TRPBF combines a buck-boost regulator, a three-stage Li-ion battery charger, and several regulators with advanced safety features. The device offers an over-voltage protection, which prevents damage in the event of an overvoltage as regulated by the adjustable over-voltage feedback pin. An over-temperature protection feature also prevents overheating and protects the battery from damage in case of high temperature.

The LTC4012CUF#TRPBF can operate in Constant Current/Constant Voltage (CC/CV) and Pulse Width Modulation (PWM) modes. In CC/CV mode, the device can be programmed to provide a constant current charging rate that is maintained until the battery is fully charged. At that point, the device transitions to Constant Voltage mode and the battery voltage will be maintained until the device detects a low-battery condition. The PWM mode is very similar to the CC/CV mode, but the charger can be programmed to provide a varying current charging rate, allowing the system to operate in a more efficient manner.

The device also features an adjustable power limit feature that is designed to protect the system and battery from overloading. This feature can be programmed to provide a desired current limit for each port. The device also offers an integrated ADC that allows for temperature sensing, automatic power up, and thermal regulation for system safety.

The LTC4012CUF#TRPBF is a highly integrated solution that offers a wide range of features and functions, making it an ideal choice for battery charging and power management applications.

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