Summary of LMD18200 H-Bridge Module for DC Motor
This article describes an LMD18200 H-Bridge module designed for driving DC and stepper motors. Based on Texas Instruments' chip, it supports up to 3A continuous current (6A peak) and operates at supply voltages up to 55V. Key features include low-loss current sensing, thermal protection, and TTL/CMOS compatibility. The module is compact, measuring 44mm by 25mm, and includes screw terminals for power connections alongside a 6-pin header for control signals like PWM and direction.
Parts used in the LMD18200 H-Bridge Module:
- LMD18200 Chip
- Screw-terminals for Power Supply
- Screw-terminals for Motor Connections
- 6-pin Header connector
- PCB with dimensions 44 mm x 25 mm
- Mounting holes of 2.6 mm
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
- What is the primary function of this module?
The module is designed around the LMD18200 to drive DC and stepper motors. - How much continuous output current does the device deliver?
It delivers up to 3A continuous output current. - Can the module operate at high supply voltages?
Yes, it operates at supply voltages up to 55V. - Does the module provide thermal protection?
Yes, it features a Thermal Warning Flag Output at 145°C and Thermal Shutdown at 170°C. - What type of connectors are included for motor connections?
The module uses screw-terminals for Power Supply and Motor Connections. - Is the input compatible with standard logic families?
Yes, it has TTL and CMOS Compatible Inputs. - What is the peak output current capability?
The device accommodates peak output currents up to 6A. - Are there protections against short circuits?
Yes, the module includes Shorted Load Protection.
