L6228PDTR Datasheet

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L6228

DMOS DRIVER FOR BIPOLAR STEPPER MOTOR

s

s

s

s

s

s

s

s

s

s

s

s

s

OPERATING SUPPLY VOLTAGE FROM 8 TO 52V

2.8A OUTPUT PEAK CURRENT (1.4A RMS)

R

DS(ON)

0.73鈩?TYP. VALUE @ T

j

= 25掳C

OPERATING FREQUENCY UP TO 100KHz

NON DISSIPATIVE OVERCURRENT

PROTECTION

DUAL INDEPENDENT CONSTANT t

OFF

PWM

CURRENT CONTROLLERS

FAST/SLOW DECAY MODE SELECTION

FAST DECAY QUASI-SYNCHRONOUS

RECTIFICATION

DECODING LOGIC FOR STEPPER MOTOR

FULL AND HALF STEP DRIVE

CROSS CONDUCTION PROTECTION

THERMAL SHUTDOWN

UNDER VOLTAGE LOCKOUT

INTEGRATED FAST FREE WHEELING DIODES

PowerDIP24

(20+2+2)

PowerSO36

SO24

(20+2+2)

ORDERING NUMBERS:

L6228N (PowerDIP24)

L6228PD (PowerSO36)

L6228D (SO24)

TYPICAL APPLICATIONS

s

BIPOLAR STEPPER MOTOR

DESCRIPTION

The L6228 is a DMOS Fully Integrated Stepper Motor

Driver with non-dissipative Overcurrent Protection,

realized in MultiPower-BCD technology, which com-

BLOCK DIAGRAM

bines isolated DMOS Power Transistors with CMOS

and bipolar circuits on the same chip. The device in-

cludes all the circuitry needed to drive a two-phase

bipolar stepper motor including: a dual DMOS Full

Bridge, the constant off time PWM Current Controller

that performs the chopping regulation and the Phase

Sequence Generator, that generates the stepping

sequence. Available in PowerDIP24 (20+2+2),

PowerSO36 and SO24 (20+2+2) packages, the

L6228 features a non-dissipative overcurrent protec-

tion on the high side Power MOSFETs and thermal

shutdown.

VBOOT

V

BOOT

V

BOOT

V

BOOT

CHARGE

PUMP

OCD

A

OCD

B

OVER

CURRENT

DETECTION

10V

10V

VS

A

VCP

OUT1

A

OUT2

A

THERMAL

PROTECTION

EN

CONTROL

GATE

LOGIC

SENSE

A

HALF/FULL

CLOCK

RESET

CW/CCW

STEPPING

SEQUENCE

GENERATION

ONE SHOT

MONOSTABLE

PWM

MASKING

TIME

+

-

SENSE

COMPARATOR

BRIDGE A

OVER

CURRENT

DETECTION

GATE

LOGIC

BRIDGE B

VS

B

VREF

A

RC

A

VOLTAGE

REGULATOR

OUT1

B

OUT2

B

SENSE

B

VREF

B

RC

B

10V

5V

D01IN1225

September 2003

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

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