The LMD18201 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. The H-Bridge configuration is ideal for driving DC and step-per motors. The LMD18201 accommodates peak output currents up to 6A. Current sensing can be achieved via a small sense resistor connected in series with the power ground lead. For current sensing without disturbing the path of current to the load, the LMD18200 is recommended.
The LMD18201 is a 3 A H‑Bridge designed for motion‑control applications, capable of handling peak output currents up to 6 A. It combines bipolar and CMOS control circuitry with DMOS power devices, offering features such as thermal‑warning flag, internal clamp diodes, short‑load protection, and an internal charge pump with optional external bootstrap capacitors.
Typical applications include DC and stepper motor drives, position and velocity servomechanisms, factory‑automation robots, and printers or plotters. The device supports both locked anti‑phase PWM and sign/magnitude PWM signals, and provides a current‑sensing option via a small sense resistor on the power‑ground/sense pin.
| Continuous Output Current | 3 A |
|---|---|
| Peak Output Current (200 ms) | 6 A |
| Supply Voltage Range | 12 V to 55 V |
| Thermal Flag Activation Temperature | 145 °C |
| Thermal Shutdown Temperature | 170 °C |
| Power Dissipation (25 °C, free air) | 3 W |
| Maximum Junction Temperature | 150 °C |
The device can deliver up to 3 A of continuous output current.
By adding a small sense resistor (≤0.1 Ω) between the POWER GROUND/SENSE pin (Pin 7) and circuit ground; the voltage across the resistor must stay between –1 V and +0.5 V.