L6728TR

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

L6728TR Application Field and Working Principle

The L6728TR is a monolithic integrated circuit forming part of the PMIC – Voltage Regulators – DC DC Switching Controllers family of control products. It is intended to control and regulate the output of DC-DC converters, direct-current isolation modules and high-density switched-mode power supplies (SMPS).

The underlying principle of the operation of the L6728TR is based on a type of buck-boost DC-DC converter in which a voltage source is switched from low to high ‘on-time’ by means of a pulse-width-modulator (PWM). The voltage source is regulated by adjusting the corresponding ‘on-time’ pulse-width. The device is affected by input and output voltages, current consumption and the internal temperature of the chip.

Besides the voltage control, the circuit provides a number of protections aimed to ensure safe functioning of the DC-DC converter, such as undervoltage lockout, overvoltage protection, overcurrent protection and thermal shutdown. It also features two enable pins, two independent pins for dynamic enable/disabling functions, two pins for dynamic output voltage up/down adjustment and a switching pin to select PWM/PFM mode. Additional features include a low-power shutdown mode, integrated over-temperature protection, high-switching frequency, low power consumption and pre-programmed soft-start.

The L6728TR is applicable to various applications, including laptops, instrumentation equipments and other personal electronics, telecommunications, automotive and industrial equipment. Most external components required for implementing the DC-DC converter are integrated on the chip, so the L6728TR requires minimal additional external components for implementation. Moreover, its small form factor reduces imple-mentation complexity.

It is important to note that due to the high current capability of the device, the thermal shutdown threshold can be triggered constantly if the ambient temperature is too high, thus resulting in excessive manufacturing cost. Therefore, it is important to correctly size up the conditions of the program to ensure safe and suitable operation.

The L6728TR provides excellent accuracy and stability, ensuring reliable and robust operation. Its wide range of features significantly reduce time and cost of implementation, particularly for bulky DC-DC converters. This makes it an excellent choice for many applications requiring advanced circuit protection and fast response time.

The specific data is subject to PDF, and the above content is for reference