Onsemi LB1846MC-AH: Low-Voltage Dual DC Brushed Motor Driver for Automotive and Industrial Applications

The demand for efficient, compact, and robust motor control solutions continues to grow across automotive and industrial sectors. Addressing this need, the LB1846MC-AH from Onsemi stands out as a highly integrated, dual-channel low-voltage DC brushed motor driver engineered for reliability and performance in demanding environments. This driver IC is specifically designed to simplify the control of small motors while offering critical protection features essential for both automotive subsystems and industrial automation equipment.

A key strength of the LB1846MC-AH lies in its versatile low-voltage operation, typically between 4.5 V and 16 V, making it suitable for a wide range of applications from 12 V automotive systems to portable industrial tools. Its ability to deliver a continuous output current of up to 1.0 A per channel (with a peak of 1.5 A) allows it to drive small motors, actuators, and pumps directly, reducing system complexity and component count.

The IC integrates a full H-bridge for each channel, enabling precise bidirectional control of two independent DC brushed motors or a single, more powerful motor in a parallel configuration. Control is simplified via a parallel digital input interface (IN1, IN2 for each channel), which accepts standard logic-level signals from a microcontroller for forward, reverse, brake, and stop modes. This ease of integration accelerates development cycles and minimizes software overhead.

For mission-critical applications, the LB1846MC-AH is built with a strong emphasis on robust system protection. It incorporates multiple built-in safety features including thermal shutdown (TSD) to prevent damage from overheating, an under-voltage lockout (UVLO) function that disables outputs when the supply voltage is too low, and a built-in over-current protection (OCP) circuit that safeguards the IC and the motors from excessive current draw. These features are paramount for enhancing the longevity and reliability of the end product, especially in the harsh operating conditions of automotive environments.

Furthermore, the device boasts an extremely low standby current consumption, a critical attribute for battery-powered or always-on automotive systems where energy efficiency is a priority. Packaged in a space-saving HSOP-16 package, it also offers excellent thermal performance for its footprint.

ICGOOODFIND: The Onsemi LB1846MC-AH is a robust and highly integrated dual motor driver solution that excels in low-voltage applications. Its combination of adequate drive current, comprehensive protection features, and simple control interface makes it an excellent choice for designers seeking to add reliable, compact, and efficient motion control to automotive and industrial systems.

Keywords: DC Brushed Motor Driver, Low-Voltage Operation, Thermal Shutdown Protection, Bidirectional Control, Automotive Applications.