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PDF TDA7245 Data sheet ( Hoja de datos )
| Número de pieza | TDA7245 | |
| Descripción | 5W AUDIO AMPLIFIER WITH MUTING AND STAND-BY | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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TDA7245
5W AUDIO AMPLIFIER WITH MUTING AND STAND-BY
MUTING AND STAND-BY FUNCTIONS
VOLTAGE RANGE UP TO 30V
HIGH SUPPLY VOLTAGE REJECTION
SVR TYP = 50dB (f = 100Hz)
MUSIC POWER = 12W (RL = 4Ω, d = 10%)
PROTECTION AGAINST CHIP OVER
TEMPERATURE
DESCRIPTION
The TDA7245 is a monolithic integrated circuit in
9+9 POWERDIP package, intended for use as
Figure 1: Test and Application Circuit
Powerdip 9+9
ORDERING NUMBER: TDA7245
low frequency power amplifier in a wide range of
applications in radio and TV sets.
March 1995
1/11
1 page  
Figure 3: P.C. Board and Components Layout of the Circuit of fig 2 (1:1 scale)
TDA7245
APPLICATION SUGGESTIONS
The recommended values of the external components are those shown on the application circuit of fig.1.
Different values can be used. The following table can help the dsigner.
Component Rec. Value
R1 20KΩ
R2(*)
R3(*)
R4
C1
27KΩ
270Ω
1Ω
22µF
C2 47µF
C3 0.1µF
C4 2.2µF
C5 470µF
C6 0.22µF
C7 1000µF
Purpose
St-By Biasing
Feedback
Resistors
Frequency Stability
St-By Capacitor
SVR Capacitor
Input Capacitance
Inverting Input DC
Decoupling
Supply Voltage
Frequency Stability
Output DC Decoupling
Larger than Rec. Value
Incorrect St-By Function
Increase of Gain
Decrease of Gain
Danger of Oscillations
Longer ON/OFF Delay
Time at St-By IN/OUT
Worse Turn-On POP by
VS and St-By
Danger of Oscillations
Smaller than Rec. Value
Worse POP and Shorter
Delay at St-By Insertion
Decrease of Gain
Increase of Gain
Worse POP and Shorter
Delay at St-By insertion
Degradation of SVR
Higher Low Frequency
Cut-off
Higher Low Frequency
Cut-off
Danger of Oscillations
Higher Low Frequency
Cut-off
(*) The value of closed loop gain (GV = 1 + R2/R3) must be higher than 25dB.
5/11
5 Page 
TDA7245
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.
© 1996 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.
11/11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet TDA7245.PDF ] | |
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