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(R)
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 PROTECTION 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
SO28 (24+2+2)
and it's capable of driving focus & tracking actuators sledge & spindle motors. The regulators are mainly used to have a 5V supply for the power part and a lower programmable voltage for the logic circuits.
Figure 1: Quad BTL Power Bridges + Multifunction Regulators.
+ VSUP OC DRIV 5V IN2 IN1 VS1 VS2 VS3 VS4
+ VS/2 +
OUT 1+ SPINDLE MOTOR
VBG
M + OUT 1-
REG
+ + VS/2 + -
OUT 2+ SLEDGE MOTOR
R1 1K
-
M
OUT 2-
ADJ R2 1K
VBG + REFERENCE VBG VS/2 + + OUT 3TRACKING ACTUATOR OUT 3+
+ + VS/2 + -
OUT 4+ FOCUS ACTUATOR OUT 4-
ST_BY
IN3
IN4
COMM REF
GND GND GND GND
D95AU223B
June 1998
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TDA7473
PIN CONNECTION (Top view)
5V VSUP OUT1VS1 OUT1+ OC GND GND ADJ OUT2+ VS2 OUT2ST_BY REG 1 2 3 4 5 6 7 8 9 10 11 12 13 14
D95AU310A
28 27 26 25 24 23 22 21 20 19 18 17 16 15
DRIV IN1 OUT4VS4 OUT4+ IN4 GND GND IN3 OUT3+ VS3 OUT3IN2 COMM
PIN FUNCTIONS
N. Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 2/5 Name 5V VSUP OUT1VS1 OUT1+ OC GND GND ADJ OUT2+ VS2 OUT2_ ST_BY REG COMM IN2 OUT3VS3 OUT3+ IN3 GND GND IN4 OUT4+ VS4 OUT4IN1 DRIV Description 5V regulated input Positive power supply (battery) 1.st channel negative output 1.st channel power supply 1.st channel positive output Overcurrent sense input Ground Ground Regulated voltage adjust input 2.nd channel positive output 2.nd channel power supply 2.nd channel negative output Stand_by Regulated voltage output Common negative input Positive input for the 2.nd channel 3.rd channel negative output 3.rd channel power supply 3.rd channel positive output Positive input for the 3.rd channel Ground Ground Positive input for the 4.th channel 4.th channel positive output 4.th channel power supply 4.th channel negative output Positive input for the 1.st channel Pass transistor driver
TDA7473
ABSOLUTE MAXIMUM RATINGS
Symbol VSUP VS TOP TJ Parameter DC Supply Voltage Channel Power Supply Operating Temperature Range Maximum Junction Temperature Value 18 6 -25 to 80 150 Unit V V C C
THERMAL DATA
Symbol Rth j-amb Rth j-pins Parameter Thermal Resistance Junction to Ambient Thermal Resistance Junction to Pins Max. Typ. Value 50 (*) 17 Unit C/W C/W
(*) with 6cm2 of copper heatsink on board.
ELECTRICAL CHARACTERISTICS (@ VSUP = 6V, T amb = 25C, unless otherwise specified.)
Symbol VSUP Parameter Supply Voltage Maximum Power Dissipation (1) Quiescent current (2) from VS Quiescent current (2) from 5V Quiescent current (2) from VSUP Stand-by current from 5V (pin 1) Stand-by current from VSUP CHANNELS BTL Peak output current for channels VSAT HIGH SIDE VSAT VSAT LOW SIDE Output voltage swing peak-topeak Voltage gain for channels Channels output offset voltage VST-BY Channel St-By Threshold REGULATORS Vpin 1 V5V Min drop 5V --> REG Output current from DRIV for IDRIV pass-transistor driving Output current from DRIV in stand-by DROP VSUP --> DRIV Threshold voltage for overcurr. protection (VSUP - OC) VREG Regulator Voltage Min REG voltage (settable) Max REG voltage (settable) Output current from REG in Stand-by Test Condition Min. 6 Typ. 1.5 20 1.8 1.3 1 1.2 0.4 0.3 0.6 I = 0.6A; VS = 5V I = 0.6A; VS = 5V VS = 5V, Iout = 0.6A 1.3 0.7 6 1.6 0.9 Max. 15 35 2.5 2.5 2 2 0.8 0.6 Unit V W mA mA mA mA mA mA mA A A A Vpp dB mV V V V V mA mA V mV mV mV V V V mA
V(pin 4, 11, 18, 25) = 5V V(pin 1) = 5V, R2 = VSUP = 15V VSUP = 6V V(pin 1) = 5V, R2 = VSUP = 15V VSUP = 6V
5.5
Active --> St-By St-By --> Active Iout = 0.2A Iout = 0.2A
25.5 26.5 27.5 -180 -50 100 0.65 Vreg 0.75 Vreg 0.85 Vreg 0.50 Vreg 4.85 50 20 5.05 1.2 100 50 0.2 230 160 100 2.53 1.8 3.8 5.25 1.3
80 0.25 270 200 120 2.65 2
IDRIV = 20mA VSUP = 6V VSUP = 12V VSUP = 15V R1, R2 = 1K
190 120 80 2.45 3.6 20
R1, R2 = 1K
(1) @ Tamb = 70C, on board 6cm2 copper heatsink (2) INx = COMM; no loads on the regulators outputs (3) Device is active when St-By = Low
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TDA7473
SO28 PACKAGE MECHANICAL DATA
DIM. MIN. A a1 b b1 C c1 D E e e3 F L S 7.4 0.4 17.7 10 1.27 16.51 7.6 1.27 8 (max.) 0.291 0.016 18.1 10.65 0.1 0.35 0.23 0.5 45 (typ.) 0.697 0.394 0.050 0.65 0.299 0.050 0.713 0.419 mm TYP. MAX. 2.65 0.3 0.49 0.32 0.004 0.014 0.009 0.020 MIN. inch TYP. MAX. 0.104 0.012 0.019 0.013
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TDA7473
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics (c) 1998 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
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