TDA7473A Datasheet, PDF (1/5 Pages) STMicroelectronics – QUAD BTL DRIVER WITH VOLTAGE REGULATOR

®
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}
t(s ^{SHORT CIRCUIT PROTECTION}
c ADJUSTABLE REGULATOR (2.0 TO 3.6V @
u 200mA) WITH SHORT CIRCUIT PROTEC-
d _TION
SO28 (24+2+2)
Pro _{t(s) DESCRIPTION}
te ^{c This device is a quad power driver circuit in BTL}
le ^{u configuration, intended for use as a power driver}
d _{for servo systems with a single supply.}
so ^ro 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.
b ^P _{Figure 1: Quad BTL Power Bridges + Multifunction Regulators.}
) ^{- O lete +}
t(s ^{o VSUP}
OC DRIV 5V
IN2
IN1 VS1 VS2 VS3 VS4
Produc_t(s) ^{- Obs VBG}
-
+
+
VS/2
-
+
-
OUT 1+
M ^SPINDLE
MOTOR
OUT 1-
lete ^{uc REG}
so ^rod R1
b P ^1K
O _teADJ
le_R2
Obso^1K
VBG
REFERENCE
VBG
-
+
+
VS/2
-
+
-
-
+
+
VS/2
-
+
-
OUT 2+
M
SLEDGE
MOTOR
OUT 2-
OUT 3+
TRACKING
ACTUATOR
OUT 3-
June 1998
+
-
ST_BY IN3 IN4 COMM
REF
-
+
VS/2
+
-
OUT 4+
FOCUS
ACTUATOR
OUT 4-
GND GND GND GND
D95AU223B
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