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LMD18201

www.ti.com

SNVS092D –APRIL 1998–REVISED APRIL 2013

LMD18201 3A, 55V H-Bridge

Check for Samples: LMD18201

FEATURES

APPLICATIONS

• Delivers up to 3A Continuous Output

• DC and Stepper Motor Drives

• Operates at Supply Voltages up to 55V • Position and Velocity Servomechanisms

• Low R

DS(ON)

Typically 0.33Ω per Switch at 3A • Factory Automation Robots

• TTL and CMOS Compatible Inputs • Numerically Controlled Machinery

• No “Shoot-Through” Current • Computer Printers and Plotters

• Thermal Warning Flag Output at 145°C

DESCRIPTION

• Thermal Shutdown (Outputs Off) at 170°C

The LMD18201 is a 3A H-Bridge designed for motion

• Internal Clamp Diodes

control applications. The device is built using a multi-

• Shorted Load Protection

technology process which combines bipolar and

CMOS control circuitry with DMOS power devices on

• Internal Charge Pump with External Bootstrap

the same monolithic structure. The H-Bridge

Capability

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.

Functional Diagram

Figure 1. Functional Block Diagram of LMD18201

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (17 pages)

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LMD18201 www.ti.com SNVS092D – APRIL 1998 – REVISED APRIL 2013 LMD18201 3A, 55V H-Bridge Check for Samples: LMD18201 FEATURES APPLICATIONS • • • • • • • • • • • • • • • 1 2 Delivers up to 3A Continuous Output Operates at Supply Voltages up to 55V Low RDS(ON) Typically 0.
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LMD18201 SNVS092D – APRIL 1998 – REVISED APRIL 2013 www.ti.com Connection Diagram Figure 2.
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LMD18201 www.ti.com SNVS092D – APRIL 1998 – REVISED APRIL 2013 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
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LMD18201 SNVS092D – APRIL 1998 – REVISED APRIL 2013 www.ti.com Electrical Characteristics(1) (continued) The following specifications apply for VS = 42V, unless otherwise specified. Boldface limits apply over the entire operating temperature range, −40°C ≤ TJ ≤ +125°C, all other limits are for TA = TJ = 25°C. Typ Limit Units IF(OFF) Symbol Flag Output Leakage VF = 12V 0.
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LMD18201 www.ti.com SNVS092D – APRIL 1998 – REVISED APRIL 2013 Typical Performance Characteristics VSAT vs Flag Current RDS(ON) vs Temperature Figure 3. Figure 4. RDS(ON) vs Supply Voltage Supply Current vs Supply Voltage Figure 5. Figure 6. Supply Current vs Frequency (VS = 42V) Supply Current vs Temperature (VS = 42V) Figure 7. Figure 8.
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LMD18201 SNVS092D – APRIL 1998 – REVISED APRIL 2013 www.ti.
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LMD18201 www.ti.com SNVS092D – APRIL 1998 – REVISED APRIL 2013 Pinout Descriptions (See Test Circuit) 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 1 output. Pin 3, DIRECTION Input: See Logic Truth Table. This input controls the direction of current flow between OUTPUT 1 and OUTPUT 2 (pins 2 and 10) and, therefore, the direction of rotation of a motor load.
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LMD18201 SNVS092D – APRIL 1998 – REVISED APRIL 2013 www.ti.com APPLICATION INFORMATION TYPES OF PWM SIGNALS The LMD18201 readily interfaces with different forms of PWM signals. Use of the part with two of the more popular forms of PWM is described in the following paragraphs. Simple, locked anti-phase PWM consists of a single, variable duty-cycle signal in which is encoded both direction and amplitude information (see Figure 9).
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LMD18201 www.ti.com SNVS092D – APRIL 1998 – REVISED APRIL 2013 Figure 11. Transitions in Brake, Direction, or PWM Must be Separated by At Least 1 μsec SIGNAL TRANSITION REQUIREMENTS To ensure proper internal logic performance, it is good practice to avoid aligning the falling and rising edges of input signals. A delay of at least 1 µsec should be incorporated between transitions of the Direction, Brake, and/or PWM input signals.
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LMD18201 SNVS092D – APRIL 1998 – REVISED APRIL 2013 www.ti.com CURRENT LIMITING Current limiting protection circuitry has been incorporated into the design of the LMD18201. 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.
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LMD18201 www.ti.com SNVS092D – APRIL 1998 – REVISED APRIL 2013 Figure 13. Bootstrap Circuitry INTERNAL PROTECTION DIODES A major consideration when switching current through inductive loads is protection of the switching power devices from the large voltage transients that occur. Each of the four switches in the LMD18201 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.
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LMD18201 SNVS092D – APRIL 1998 – REVISED APRIL 2013 www.ti.com CURRENT SENSING In many motor control applications it is desirable to sense and control the current through the motor. For these types of applications a companion product, the LMD18200, is also available. The LMD18200 is identical to the LMD18201 but has current sensing transistors that output a current directly proportional to the current conducted by the two upper DMOS power devices to a separate current sense pin.
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LMD18201 www.ti.com SNVS092D – APRIL 1998 – REVISED APRIL 2013 REVISION HISTORY Changes from Revision C (April 2013) to Revision D • Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
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MECHANICAL DATA NDJ0011B TA11B (Rev B) www.ti.
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