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TDA7275A
MOTOR SPEED REGULATOR
.EXCELLENT .HI .LOW .LOW .EXCELLENT .START/ .DUMP
VERSATILITY IN USE GH OUTPUT CURRENT (up to 1.5 A) QUIESCENT CURRENT REFERENCE VOLTAGE (1.32 V) PARAMETERS STABILITY VERSUS AMBIENT TEMPERATURE STOP FUNCTION (TTL levels) PROTECTION
MINIDIP (4 + 4 )
DESCRIPTION The TDA7275A is a linear integrated circuit in minidip plastic package. It is intended for use as speed regulator for DC motors of record players, tape and cassette recorders. The dump protection make it particularly suitable for car radio applications.
ORDERING NUMBER : TDA7275A
PIN CONNECTION (top view)
May 1997
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SCHEMATIC DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol VS VS IM Top Ptot Supply Voltage Peak Supply Voltage (for 50ms) Maximum Output Current Operating Temperature Range Power Dissipation at Tamb = 70C at Tpins = 70C Parameter Value 19 45 1.5 -30 to +85 1 4 Unit V V A C W W
THERMAL DATA
Symbol Rth j-amb Rth j-pins Parameter Thermal Resistance Junction-ambient Max. Thermal Resistance Junction -pins Value 80 20 Max. Unit C/W C/W
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ELECTRICAL CHARACTERISTICS (Refer to test circuit, VS = 12V, Tamb = 25C unless otherwise specified, refer to test circuit)
Symbol VS Vref Iq + Id Id Ims V4 K = IM/IT K VS K K IM K K T K Vref VS Vref Vref IM Vref Vref T Vref V2 I2 V2 I2 Line Regulation Load Regulation Temperature Coefficient Motor "Stop" (Acc. Following data or grounded) Motor "Stop" Motor "Run" (Acc. Following data or open) Motor "Run" V2 = 1.5V V2 = 1V Parameter Supply Voltage Range Reference Voltage Total Quiescent Current Quiescent Current Starting Motor Current Saturation Voltage Reflection coefficient IM = 0.1A IM = 0.1mA IM = 0.1mA Vref = -50% Vref IM = 0.5A IM = 0.1A IM = 0.1A VS = 8 to 16V IM = 25 to 200mA IM = 0.1A Top = -30 to +85C IM = 0.1A VS = 8 to 16V IM = 25 to 200mA IM = 0.1A Top = -30 to +85C 18 1 1.7 20 0.5 -0.05 0.02 0.04 -0.01 0.02 1 -0.05 1.5 -0.1 2 22 Test Condition Min. 8 1.05 1.22 2 1 Typ. Max. 18 1.35 Unit V V mA mA A V - %/V %/mA %/C %/V %/mA %/C V mA V mA
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TDA7275A
Figure 1 : Test Circuit.
Figure 2 : Application Circuit.
- RTtyp. = Ktyp. RMtyp. if RT > Kmin RMmin instability may accur. - A diode across the motor could be necessary with certain kind of motor.
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Figure 3 : Quiescent Current vs. Supply voltage. Figure 4 : Speed Variation vs. Supply Voltage.
Figure 5 : Speed Variation vs. Torque (VS = 12 V).
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MINIDIP PACKAGE MECHANICAL DATA
DIM. MIN. A a1 B B1 b b1 D E e e3 e4 F I L Z 0.44 3.3 1.6 0.017 8.8 2.54 7.62 7.62 7.1 4.8 0.130 0.063 0.38 0.7 1.39 0.91 0.5 0.5 9.8 0.346 0.100 0.300 0.300 0.280 0.189 0.015 1.65 1.04 mm TYP. 3.3 0.028 0.055 0.036 0.020 0.020 0.386 0.065 0.041 MAX. MIN. inch TYP. 0.130 MAX.
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Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics 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 SGS-THOMSON Microelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. (c) 1997 SGS-THOMSON Microelectronics - Printed in Italy - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
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