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LMD18200-2D/883 Datasheet

Download or read online National Semiconductor LMD18200-2D/883 3A, 55V H-Bridge pdf datasheet.
Also see for LMD18200-2D/883: Datasheet #2 (13 pages)



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LMD18200
3A, 55V H-Bridge
General Description
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
n Delivers up to 3A continuous output
n Operates at supply voltages up to 55V
n Low R
(ON) typically 0.3Ω per switch
DS
n TTL and CMOS compatible inputs
Functional Diagram
FIGURE 1. Functional Block Diagram of LMD18200
© 2005 National Semiconductor Corporation
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
DS010568
April 2005
01056801
www.national.com
Specifications of National Semiconductor LMD18200-2D/883
Lead Free Status / Rohs Status:
Not Compliant
Operating Supply Voltage (max):
55V
Operating Supply Voltage (min):
12V
Operating Temperature Classification:
Automotive
Package Type:
PDIP

Summary of Contents

Page 1

... LMD18200 3A, 55V H-Bridge General Description The LMD18200 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 ...

Page 2

... Connection Diagrams and Ordering Information www.national.com 11-Lead TO-220 Package Top View Order Number LMD18200T See NS Package TA11B 01056825 24-Lead Dual-in-Line Package Top View Order Number LMD18200-2D-QV 5962-9232501VXA LMD18200-2D/883 5962-9232501MXA See NS Package DA24B 2 01056802 ...

Page 3

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Total Supply Voltage (V , Pin 6) S Voltage at Pins and 9 Voltage at Bootstrap Pins (Pins 1 and 11) Peak Output Current (200 ms) Continuous Output Current (Note 2) ...

Page 4

Electrical Characteristics Notes Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not apply when operating the device beyond its rated operating conditions. Note 2: See Application Information ...

Page 5

Typical Performance Characteristics Supply Current vs Frequency (V 42V) S Current Sense Output vs Load Current Test Circuit (Continued) 01056820 01056822 5 Supply Current vs Temperature (V 42V) S 01056821 Current Sense Operating Region 01056823 01056808 www.national.com ...

Page 6

... Figure 2). A 50% duty-cycle PWM signal represents zero drive, since the net value of voltage (integrated over one period) delivered to the load is zero. For the LMD18200, the PWM signal drives the direc- tion input (pin 3) and the PWM input (pin 5) is tied to logic high. ...

Page 7

... Current delivered to the load is pro- portional to pulse width. For the LMD18200, the DIRECTION input (pin 3) is driven by the sign signal and the PWM input (pin 5) is driven by the magnitude signal. ...

Page 8

... CURRENT LIMITING Current limiting protection circuitry has been incorporated into the design of the LMD18200. With any power device it is important to consider the effects of the substantial surge currents through the device that may occur as a result of shorted loads. The protection circuitry monitors this increase ...

Page 9

... A major consideration when switching current through induc- tive loads is protection of the switching power devices from the large voltage transients that occur. Each of the four switches in the LMD18200 have a built-in protection diode to clamp transient voltages exceeding the positive supply or ground to a safe diode voltage drop across the switch. ...

Page 10

... Typical Applications TORQUE REGULATION Locked Anti-Phase Control of a brushed DC motor. Current sense output of the LMD18200 provides load sensing. The LM3524D is a general purpose PWM controller. The relation- ship of peak motor current to adjustment voltage is shown in Figure 10. www.national.com (Continued) FIGURE 7. Fixed Off-Time Control FIGURE 8 ...

Page 11

Typical Applications (Continued) FIGURE 9. Locked Anti-Phase Control Regulates Torque VELOCITY REGULATION Utilizes tachometer output from the motor to sense motor speed for a locked anti-phase control loop. The relationship of motor speed to the speed adjustment control voltage is ...

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Typical Applications FIGURE 11. Regulate Velocity with Tachometer Feedback www.national.com (Continued) FIGURE 12. Motor Speed vs Control Voltage 12 01056814 01056815 ...

Page 13

... Physical Dimensions inches (millimeters) unless otherwise noted 11-Lead TO-220 Power Package (T) Order Number LMD18200T NS Package Number TA11B 13 www.national.com ...

Page 14

... Français Tel: 33 ( 8790 24-Lead Dual-in-Line Package Order Number LMD18200-2D-QV 5962-9232501VXA LMD18200-2D/883 5962-9232501MXA NS Package Number DA24B 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system affect its safety or effectiveness ...

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