L6204

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APPLICATION DIAGRAM

CIRCUIT DESCRIPTION

L6204 is a dual full bridge IC designed to drive DC motors, stepper motors and other inductive loads. Each

(see fig. 3)

The 4 half bridges can be controlled independently by means of the 4 inputs IN!, IN2, IN3, IN4 and 2 en-

able inputs ENABLE1 and ENABLE2.

External connections are provided so that sensing resistors can be added for constant current chopper

applications.

LOGIC DRIVE (*)

L = Low H = High X = Don’t care

(*) True table for the two full bridges

INPUTS

OUTPUT MOSFETS

EN1=EN2=H

IN1

IN2

IN3

IN4

L

L

Sink 1, Sink 2

L

H

Sink 1, Source 2

H

L

Source 1, Sink 2

H

H

Source 1, Source 2

EN1=EN2=L

X

X

All transistor turned OFF

STEPPER MOTOR

A

B

Vs2

OUT3

OUT4

OUT2

OUT1

Vs1

D1

C1

VBOOT

IN1

ENABLE1

IN2

CHARGE

PUMP

THERMAL

SHUT DOWN

BOOTSTRAP

OSCILLATOR

C2

D2

SENSE1

SENSE1

RS1

GND

SENSE2

SENSE2

RS2

Vs

IN4

ENABLE 2

IN3