National Semiconductor LMD18201 Technical data

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.

Features

n Delivers up to 3A continuous output
n Operates at supply voltages up to 55V
n Low R

typically 0.33Ω per switch

DS(ON)

LMD18201 3A, 55V H-Bridge

October 2000

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

01079301

FIGURE 1. Functional Block Diagram of LMD18201

© 2004 National Semiconductor Corporation DS010793 www.national.com

Connection Diagram and Ordering Information

LMD18201

Top View

Order Number LMD18201T

See NS Package Number TA11B

01079302

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LMD18201

Absolute Maximum Ratings (Note 1)

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) 60V

S

Power Dissipation (T

Junction Temperature, T

= 25˚C, Free Air) 3W

A

J(max)

150˚C

ESD Susceptibility (Note 4) 1500V

Storage Temperature, T

STG

−40˚C to +150˚C

Lead Temperature (Soldering, 10 sec.) 300˚C

Voltage at Pins 3, 4, 5 and 9 12V

Voltage at Bootstrap Pins (Pins 1 and 11) V

OUT

+ 16V

Operating Ratings(Note 1)

Peak Output Current (200 ms) 6A

Continuous Output Current (Note 2) 3A

Power Dissipation (Note 3) 25W

Junction Temperature, T

V

Supply Voltage +12V to +55V

S

J

−40˚C to +125˚C

Sense Voltage (Pin 7 to Pin 8) +0.5V to −1.0V

Electrical Characteristics(Note 5)

The following specifications apply for VS= 42V, unless otherwise specified. Boldface limits apply over the entire operating
temperature range, −40˚C ≤ T

Symbol Parameter Conditions Typ Limit Units

R

R

V

V

I

IL

V

I

IL

DS(ON)

DS(ON)

CLAMP

IL

IH

Switch ON Resistance Output Current = 3A (Note 6) 0.33 0.4/0.6 Ω (max)

Switch ON Resistance Output Current = 6A (Note 6) 0.33 0.4/0.6 Ω (max)

Clamp Diode Forward Drop Clamp Current = 3A (Note 6) 1.2 1.5 V (max)

Logic Low Input Voltage Pins 3, 4, 5 −0.1 V (min)

Logic Low Input Current VIN= −0.1V, Pins = 3, 4, 5 −10 µA (max)

Logic High Input Voltage Pins 3, 4, 5 2 V (min)

Logic High Input Current VIN= 12V, Pins = 3, 4, 5 10 µA (max)

Undervoltage Lockout Outputs Turn OFF 9 V (min)

T

JW

V

F(ON)

I

F(OFF)

T

JSD

I

S

t

D(ON)

t

ON

t

D(OFF)

t

OFF

t

PW

t

CPR

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 for details regarding current limiting.

Note 3: The maximum power dissipation must be derated at elevated temperatures and is a function of T

dissipation at any temperature is P
junction to case (θ

Note 4: Human-body model, 100 pF discharged through a 1.5 kΩ resistor. Except Bootstrap pins (pins 1 and 11) which are protected to 1000V of ESD.

Note 5: All limits are 100% production tested at 25˚C. Temperature extreme limits are guaranteed via correlation using accepted SQC (Statistical Quality Control)

methods. All limits are used to calculate AOQL, (Average Outgoing Quality Level).

Note 6: Output currents are pulsed (t

Warning Flag Temperature Pin 9 ≤ 0.8V, IL= 2 mA 145 ˚C

Flag Output Saturation Voltage TJ=TJW,IL= 2 mA 0.15 V

Flag Output Leakage VF= 12V 0.2 10 µA (max)

Shutdown Temperature Outputs Turn OFF 170 ˚C

Quiescent Supply Current All Logic Inputs Low 13 25 mA (max)

Output Turn-On Delay Time Sourcing Outputs, I

Output Turn-On Switching Time Bootstrap Capacitor = 10 nF

Output Turn-Off Delay Times Sourcing Outputs, I

Output Turn-Off Switching Times Bootstrap Capacitor = 10 nF

Minimum Input Pulse Width Pins 3, 4 and 5 1 µs

Charge Pump Rise Time No Bootstrap Capacitor 20 µs

) is 1.0˚C/W and from junction to ambient (θJA) is 30˚C/W. For guaranteed operation T

JC

≤ +125˚C, all other limits are for TA=TJ= 25˚C.

J

Sinking Outputs, I

Sourcing Outputs, I

Sinking Outputs, I

Sinking Outputs, I

Sourcing Outputs, I

Sinking Outputs, I

=(T

D(max)

J(max)−TA

<

2 ms, Duty Cycle<5%).

W

)/θJA, or the number given in the Absolute Ratings, whichever is lower. The typical thermal resistance from

0.8 V (max)

12 V (max)

11 V (max)

= 3A 300 ns

OUT

= 3A 300 ns

OUT

= 3A 100 ns

OUT

=3A 80 ns

OUT

= 3A 200 ns

OUT

= 3A 200 ns

OUT

=3A 75 ns

OUT

=3A 70 ns

OUT

, θJA, and TA. The maximum allowable power

J(max)

= 125˚C.

J(max)

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