TDA7473

QUAD BTL DRIVER WITH VOLTAGE REGULATOR

4 BUILT-IN POWER BRIDGES (4 x 0.6A)

NO EXTERNAL COMPONENTS

SINGLE POWER SUPPLY

WIDE SUPPLY VOLTAGE RANGE (6 TO 15V)

5V REGULATOR DRIVER FOR EXTERNAL

PASS

TRANSISTOR

WITH

FOLD-BACK

SHORT CIRCUIT PROTECTION

ADJUSTABLE REGULATOR (2.0 TO 3.6V @

200mA) WITH SHORT CIRCUIT PROTEC-

TION

DESCRIPTION

This device is a quad power driver circuit in BTL

configuration, intended for use as a power driver

for servo systems with a single supply.

It’s specially dedicated to compact disc players

and it’s capable of driving focus & tracking actua-

tors sledge & spindle motors.

The regulators are mainly used to have a 5V sup-

ply for the power part and a lower programmable

voltage for the logic circuits.

June 1998

OC

+

-

VS/2

-

+

OUT 1+

OUT 1-

OUT 4-

REFERENCE

ADJ

REG

ST_BY

IN4

COMM

REF

VS3

IN2

IN1

DRIV

D95AU223B

IN3

5V

+

-

+

-

VS/2

-

+

OUT 2+

OUT 2-

+

-

+

-

VS/2

-

+

OUT 3+

OUT 3-

+

-

+

-

VS/2

-

+

OUT 4+

+

-

M

M

TRACKING

ACTUATOR

SLEDGE

MOTOR

SPINDLE

MOTOR

FOCUS

ACTUATOR

VBG

VBG

VBG

VS4

GND GND GND GND

VSUP

+

VS1

VS2

R1

1K

R2

1K

Figure 1: Quad BTL Power Bridges + Multifunction Regulators.

SO28 (24+2+2)

®

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