LMD18201 Datasheet, PDF (1/8 Pages) National Semiconductor (TI) – 3A, 55V H-Bridge

April 1998
LMD18201
3A, 55V H-Bridge
General Description
The LMD18201 is a 3A H-Bridge designed for motion control
applications. The device is built using a multi-technology pro-
cess 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 cur-
rents 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 cur-
rent to the load, the LMD18200 is recommended.
Features
n Delivers up to 3A continuous output
n Operates at supply voltages up to 55V
n Low R_DS(ON) typically 0.33Ω per switch
n TTL and CMOS compatible inputs
n No “shoot-through” current
n Thermal warning flag output at 145˚C
n Thermal shutdown (outputs off) at 170˚C
n Internal clamp diodes
n Shorted load protection
n Internal charge pump with external bootstrap capability
Applications
n DC and stepper motor drives
n Position and velocity servomechanisms
n Factory automation robots
n Numerically controlled machinery
n Computer printers and plotters
Functional Diagram
FIGURE 1. Functional Block Diagram of LMD18201
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