Infineon TLE5205-2G: A 5-A H-Bridge for DC Motor Control Applications

The control of DC motors is a fundamental requirement across countless industrial, automotive, and consumer applications, from power window lifters and seat adjusters to robotics and small drives. At the heart of many of these systems lies the H-Bridge circuit, an elegant configuration that enables bidirectional control of a DC motor. The Infineon TLE5205-2G stands as a highly integrated, monolithic solution that encapsulates a robust 5-A H-Bridge into a single, compact package, simplifying design and enhancing reliability.

This power IC is engineered to drive DC motors with a nominal operating voltage of up to 40 V and a continuous output current of up to 5 A, with peak handling capabilities reaching 6 A. Its fully integrated design eliminates the need for external flyback diodes, as it incorporates protective clamp diodes for handling inductive kickback from the motor windings. This not only reduces the overall component count and PCB footprint but also accelerates time-to-market for product developers.

A key strength of the TLEON 5205-2G is its comprehensive suite of built-in protection features, which are critical for ensuring system durability in harsh environments. These include protection against over-temperature (thermal shutdown), over-current (with automatic restart), and under-voltage lockout (UVLO). Particularly important is its cross-current protection, which prevents catastrophic shoot-through currents by ensuring that both switches on the same half-bridge cannot be active simultaneously.

The interface is straightforward, controlled via two TTL/CMOS-compatible input pins (IN1 and IN2) that select the motor's direction (forward, reverse, brake, and high-impedance stop). An additional enable pin allows for pulse-width modulation (PWM) control, facilitating precise speed regulation by rapidly switching the motor supply on and off to vary its average power. This makes the chip ideal for applications requiring both directional and variable speed control.

Housed in a thermally enhanced Multiwatt-11 vertical package, the device is optimized for efficient heat dissipation, which is paramount when driving high currents. This robust construction ensures reliable performance even under demanding conditions, a hallmark of Infineon's automotive-grade components.

ICGOO FIND: The Infineon TLE5205-2G is a highly reliable, all-in-one H-Bridge solution that simplifies the design and control of DC motors. Its integration of power switches, protection circuits, and diagnostic features into a single chip makes it an exceptional choice for designers seeking to build compact, efficient, and robust motor drive systems for a wide range of 5-A applications.

Keywords: H-Bridge, DC Motor Control, Integrated Circuit, Over-Current Protection, PWM Speed Control.