Infineon TLE4728G Dual-Channel Power Output Stage: Features and Applications

The Infineon TLE4728G is a highly integrated dual-channel power output stage IC designed to drive DC and brushless DC (BLDC) motors in demanding automotive and industrial applications. It combines two independent half-bridge channels, each capable of delivering continuous output currents up to 2.8 A, making it a robust solution for precise motor control. Its design focuses on reliability, efficiency, and system integration, which are critical for modern electronic systems.

Key Features of the TLE4728G

A primary advantage of the TLE4728G is its high level of integration. It incorporates two half-bridges with power MOSFETs, freewheeling diodes, and all necessary logic and protection circuits into a single compact package. This significantly reduces the external component count and simplifies PCB design.

The device is built for robust performance in harsh environments. It features comprehensive protection mechanisms, including overtemperature shutdown, overvoltage protection, and undervoltage lockout. Crucially, it includes cross-current protection, which prevents shoot-through currents that could damage the output transistors, enhancing system reliability.

Furthermore, its low saturation voltage minimizes power dissipation, leading to higher overall system efficiency. The logic inputs are TTL/CMOS compatible, allowing for easy interfacing with microcontrollers (MCUs) or digital signal processors (DSPs) without requiring additional level-shifting circuitry.

Primary Applications

The TLE4728G is engineered primarily for automotive body electronics. It is an ideal choice for actuating small to medium-power motors found in:

Power window lifters and sunroof controls

Adjustable seat positioning systems (e.g., lumbar support, height adjustment)

Mirror adjustment and folding mechanisms

Small pump and fan control

Beyond automotive systems, its reliability also makes it suitable for various industrial automation tasks, such as driving actuators, conveyor belts, and other automated machinery requiring compact, reliable motor drivers.

ICGOODFIND Summary

The Infineon TLE4728G stands out as a highly reliable and integrated dual-channel motor driver. Its combination of robust protection features, high output current capability, and automotive-grade qualification makes it a superior choice for designers seeking to simplify their motor control architecture while ensuring maximum durability and efficiency in demanding applications.

Keywords:

1. Dual-Channel

2. Motor Driver

3. Automotive

4. 2.8 A

5. Integrated Circuit