LMD18201

LMD18201 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 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 stepper 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. n n n n n n n 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 Applications n n n n n DC and stepper motor drives Position and velocity servomechanisms Factory automation robots Numerically controlled machinery Computer printers and plotters Features n Delivers up to 3A continuous output n Operates at supply voltages up to 55V n Low RDS(ON) typically 0.33Ω per switch Functional Diagram DS010793-1 FIGURE 1. Functional Block Diagram of LMD18201 © 1999 National Semiconductor Corporation DS010793 www.national.com Connection Diagram and Ordering Information DS010793-2 Top View Order Number LMD18201T See NS Package Number TA11B www.national.com...