Summary of LMD18200 H-Bridge Module for DC Motor
This article describes a motor driver module based on the Texas Instruments LMD18200, a 3A H-Bridge IC designed for motion control. It supports bi-directional control of DC and stepper motors with peak currents up to 6A and supply voltages up to 55V. The module includes features like low-loss current sensing, thermal protection, internal clamp diodes, and compatibility with TTL/CMOS inputs. The PCB measures 44mm by 25mm and includes screw terminals and a 6-pin header for control signals.
Parts used in the LMD18200 H-Bridge Module:
- LMD18200 H-Bridge IC
- Screw-terminals for Power Supply and Motor Connections
- 6-pin Header connector (PWM, direction, current sense, Brake)
- PCB (44 mm x 25 mm)
- Mounting hardware (including 2.6 mm mounting holes)
The module has been designed around LMD18200 from Texas Instruments. The LMD18200 is a 3A H-Bridge designed for motion control applications. The device is built using a multi-technology process which combines bipolar and CMOS control circuitry with DMOS power devices on the same monolithic structure. Ideal for driving DC and stepper motors; the LMD18200 accommodates peak output currents up to 6A. An innovative circuit which facilitates low-loss sensing of the output current has been implemented.
Features
- Powerful bi-directional DC Motor driver
- Screw-terminals for Power Supply and Motor Connections
- 6-pin Header connector for PWM, direction, current sense, Brake
- Delivers Up to 3A Continuous Output (6A Peak)
- Operates at Supply Voltages Up to 55V
- Low RDS (ON) Typically 0.33Ω per Switch at 3A
- TTL and CMOS Compatible Inputs
- No “Shoot-Through” Current
- Thermal Warning Flag Output at 145°C
- Thermal Shutdown (Outputs Off) at 170°C
- Internal Clamp Diodes
- Shorted Load Protection
- Internal Charge Pump with External Bootstrap Capability
- Mounting holes of 2.6 mm each
- PCB dimensions 44 mm x 25 mm
Schematic
For more detail: LMD18200 H-Bridge Module for DC Motor
