L6227DTR Datasheet

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L6227

DUAL DMOS FULL BRIDGE MOTOR DRIVER

PRELIMINARY DATA

s

OPERATING SUPPLY VOLTAGE FROM 8 TO

52V

2.8A PEAK CURRENT (1.4A DC)

R

DS (ON)

0.73鈩?TYP. VALUE @ T

j

= 25

掳C

BUILT-IN CONSTANT OFF TIME PWM

CURRENT CONTROL

HIGH SIDE OVER CURRENT PROTECTION

2.8A TYP

CROSS CONDUCTION PROTECTION

THERMAL SHUTDOWN

OPERATING FREQUENCY UP TO 100KHz

INTRINSIC FAST FREE WHEELING DIODES

UNDER VOLTAGE LOCKOUT

INHIBIT FUNCTION FOR LOW POWER

CONSUMPTION

manufactured with Multipower BCD technology

which combines isolated DMOS power transistors

with CMOS and bipolar circuits on the same chip.

The Logic Inputs are CMOS/TTL and

碌

P compatible.

Additional circuitry to realize a constant off time PWM

control has been implemented for each bridge.

Each full bridge is controlled by a separate Enable

and has a sense pin for the current sense resistor in-

sertion. Other features are the protection of the high

side switches against unsafe over current conditions,

the thermal shutdown and the inhibit function that al-

lows to disable all bridges and to reduce the quies-

cent current to very low values (typ. 1.1mA).

The L6227 is assembled in PowerDIP24(20+2+2),

PowerSO36 and SO24(20+2+2) packages.

PowerDIP24

PowerSO36

SO24

(20+2+2)

(20+2+2)

ORDERING NUMBERS:

L6227N

L6227PD

L6227D

s

s

s

s

s

s

s

s

s

s

TYPICAL APPLICATIONS

s

s

STEPPER MOTOR

DUAL OR QUAD DC MOTOR

DESCRIPTION

The L6227 is a dual full bridge driver for motor control

BLOCK DIAGRAM

OUT1

A

GND

GND

GND

GND

EN

A

EN

B

IN1

A

IN2

A

V

ref B

IN1

B

IN2

B

V

ref A

V

S A

SENSE

A

OUT2

A

V

S A

V

S A

V

S A

PWM

A

RC

A

/INH

Logic

&

Drivers

V

BOOT

Charge

Pump

V

CP

PWM

B

RC

B

V

S B

V

S B

V

S B

OUT1

B

SENSE

B

OUT2

B

V

S B

March 2001

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change with out notice.

1/11

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