PMIC - AC DC Converters, Offline Switchers

The LT1244IN8#PBF is an integrated offline AC/DC buck regulator which is specifically designed to overcome the issues of high voltage and road applications (≤70V). This buck regulator can also support high voltage system generated from the rectification of high incoming AC lines, and is also capable of operating in harsh industrial environments.

Inputs

The LT1244IN8#PBF features an input range from 4.5V to 28V, allowing it to work in environments such as those in automotive applications. Moreover, the input voltage is monitored using an internal undervoltage protection, thus providing a wide range of protection against fault conditions.

Outputs

The LT1244IN8#PBF features an adjustable output backed by a current limit capability which allows it to deliver up to 15A. This output can be adjusted in the range of 0.5V to 4V. In addition, the output voltage is also monitored by an internal overvoltage protection circuit, thus providing added protection against fault conditions.

Features

The LT1244IN8#PBF features soft-start time, system power down, soft-end and over current protection, thus providing a very reliable protection against unexpected fault conditions. Moreover, the device also includes an internal clock, and is also able to operate in temperatures ranging from -30°C to +125°C.

Applications

The LT1244IN8#PBF is ideally suited for a variety of industrial and automotive applications, including industrial automation, medical, renewable energy, and telecommunication systems. Moreover, it can also be used in applications that require low to moderate current requirements such as remote controls, DC/DC converters, and battery chargers.

Working Principle

The LT1244IN8#PBF is designed to deliver regulated output with high efficiency in a wide range of applications. Generally, the buck regulator works by comparing an internal voltage reference with the input voltage to establish a slowly increasing switch conduction period. This cycle is repeated until it reaches the overvoltage protection threshold or the system powerdown. Moreover, the device also includes a timer full-on limit and frequency control, allowing it to operate without the risk of thermal runaway.

To summarize, the LT1244IN8#PBF is a high performance buck regulator designed for industrial automation solutions and automotive applications. It features an input voltage range from 4.5V to 28V, and an adjustable output voltage range from 0.5V to 4V. The device also includes integrated soft start time and over current protection, as well as a wide range of clock timing and temperature protection.