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LMD18200T Datasheet

Download or read online National Semiconductor LMD18200T IC, MOTOR CTRL, HALF BRIDGE 3A TO-220-11 pdf datasheet.
Also see for LMD18200T: Datasheet #2 (9 pages)



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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 pro-
cess 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 accom-
modates peak output currents up to 6A. An innovative circuit
which facilitates low-loss sensing of the output current has
been implemented.
Features
Delivers up to 3A continuous output
Operates at supply voltages up to 55V
Low R
(ON) typically 0.33Ω per switch at 3A
DS
TTL and CMOS compatible inputs
Functional Diagram
FIGURE 1. Functional Block Diagram of LMD18200
© 2011 National Semiconductor Corporation
LMD18200
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
DC and stepper motor drives
Position and velocity servomechanisms
Factory automation robots
Numerically controlled machinery
Computer printers and plotters
10568
February 7, 2011
1056801
www.national.com
Specifications of National Semiconductor LMD18200T
Driver Case Style:
TO-220
Motor Type:
Half Bridge
No. Of Outputs:
2
No. Of Pins:
11
Operating Temperature Range:
-40°C To +125°C
Output Current:
3A
Supply Voltage Range:
12V To 55V

Summary of Contents

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... Low R (ON) typically 0.33Ω per switch TTL and CMOS compatible inputs Functional Diagram FIGURE 1. Functional Block Diagram of LMD18200 © 2011 National Semiconductor Corporation LMD18200 No shoot-through current Thermal warning flag output at 145°C Thermal shutdown (outputs off) at 170°C ■ ...

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... Connection Diagram and Ordering Information www.national.com 11-Lead TO-220 Package Top View Order Number LMD18200T See NS Package TA11B 2 1056802 ...

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... 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 ...

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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 ...

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Supply Current vs Frequency (V 42V) S Current Sense Output vs Load Current Test Circuit Temperature (V 1056820 1056822 5 Supply Current vs 42V) S 1056821 Current Sense Operating Region 1056823 1056808 www.national.com ...

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Switching Time Definitions Pinout Description (See Connection Diagram) Pin 1, BOOTSTRAP 1 Input: Bootstrap capacitor pin for half H-bridge number 1. The recommended capacitor (10 nF) is connected between pins 1 and 2. Pin 2, OUTPUT 1: Half H-bridge number ...

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Sign/magnitude PWM consists of separate direction (sign) and amplitude (magnitude) signals (see solute) magnitude signal is duty-cycle modulated, and the absence of a pulse signal (a continuous logic low level) rep- SIGNAL TRANSITION REQUIREMENTS To ensure proper internal logic performance, ...

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FIGURE 4. Transitions in Brake, Direction, or PWM Must Be Separated By At Least 1 µsec USING THE CURRENT SENSE OUTPUT The CURRENT SENSE output (pin 8) has a sensitivity of 377 μA per ampere of output current. For optimal ...

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INTERNAL CHARGE PUMP AND USE OF BOOTSTRAP CAPACITORS To turn on the high-side (sourcing) DMOS power devices, the gate of each device must be driven approximately 8V more positive than the supply voltage. To achieve this an internal charge pump ...

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TORQUE REGULATION Locked Anti-Phase Control of a brushed DC motor. Current sense output of the LMD18200 provides load sensing. The www.national.com FIGURE 7. Fixed Off-Time Control FIGURE 8. Switching Waveforms LM3524D is a general purpose PWM controller. The relation- ship ...

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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 1056813 FIGURE 10. Peak Motor Current vs Adjustment Voltage of motor speed to ...

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FIGURE 11. Regulate Velocity with Tachometer Feedback www.national.com 1056815 FIGURE 12. Motor Speed vs Control Voltage 12 1056814 ...

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... 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 ...

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... For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...

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