TDA7245A 6W AUDIO AMPLIFIER WITH STAND-BY STAND-BY FUNCTION SUPPLY VOLTAGE RANGE UP TO 30V MUSIC POWER = 16W (RL = 4Ω, d = 10%) THERMAL PROTECTION DESCRIPTION The TDA7245A is a monolithic integrated circuit in 9+9 POWERDIP package, intended for use as low frequency power amplifier in a wide range of applications in radio and TV sets. Powerdip 9+9 ORDERING NUMBER: TDA7245A Figure 1: Test and Application Circuit May 1997 1/6 TDA7245A ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit VS Supply Voltage 30 V IO Output Peak Current (non repetitive t = 100µs) 3 A IO Output Peak Current (repetitive, f > 20Hz) 2.5 A Ptot Power Dissipation at Tamb = 80°C at T case = 70°C 1 6 W W Tstg, Tj Storage and junction Temperature -40 to 150 °C PIN CONNECTION (Top view) Figure 2: Schematic Diagram THERMAL DATA Symbol Rth j-case Rth j-amb 2/6 Description Thermal Resistance junction-case Thermal Resistance junction-ambient Max Max Value Unit 15 70 °C/W °C/W TDA7245A ELECTRICAL CHARACTERISTICS (Refer to the test circuit, T amb = 25°C, VS = 16.5V, RL = 4Ω, f = 1kHz; unless otherwise specified). Symbol Parameter Test Condition Min. Typ. VS Supply Voltage VO Quiescent Output Voltage VS = 24V 11.6 Id Quiescent Drain Current VS = 28V 24 PO Output Power d = 1% VS = 16.5V, R L = 4Ω VS = 20V, R L = 8Ω d = 10% VS = 16.5V, R L = 4Ω VS = 20V, R L = 8Ω Music Power (*) VS = 24V, d = 10%, RL = 4Ω d RI Harmonic Distortion 12 6.5 Max. Unit 30 V 35 mA V 6 5 W W 7.5 6.5 W W 16 W PO = 50mW to 4W f = 1KHz f = 10KHz 0.15 0.8 VS = 20V, R L = 8Ω, PO = 50mW to 3.5W f = 1KHz f = 10KHz 0.12 0.5 0.5 % % % % Input Impedance f = 1kHz BW Small signal bandwidth (-3dB) PO = 1W GV Voltage Gain (open loop) f = 1KHz GV Voltage Gain (closed loop) f = 1KHz eN Total Input Noise B = 22 - 22,000Hz R s = 50Ω R s = 1kΩ R s = 10kΩ 1.7 2 3 86 dB 45 dB 150 °C S/N Signal to Noise Ratio PO = 5W; RS = 10KΩ SVR Supply Voltage Rejection VS = 16.5V; R L = 8Ω; f = 100Hz R s = 10kΩ; Vr = 0.5Vrms T sd 30 KΩ 20 to 40,000 Hz 75 39 38 Thermal shut-down Junction Temperature 40 dB 41 dB 6 mV µV µV STAND-BY FUNCTION Symbol Parameter Test Condition Vst-by Pin 5 DC Voltage SW1 Open (play) Ist- by Pin 5 Current SW1 Closed (st-by) Stand-by Attenuation f = 1kHz ATT st-by Vt Id st-by Stand-by Threshold (pin 5) Quiescent Current @ Stand-by Min. Typ. Max. 6.4 160 70 V 280 90 µA dB 3.8 2 Unit V 4 mA Note (*): MUSIC POWER CONCEPT MUSIC POWER is ( according to the IEC clauses n.268-3 of Jan 83) the maximal power which the amplifier is capable of producing across the rated load resistance (regardless of non linearity) 1 sec after the application of a sinusoidal input signal of frequency 1KHz. According to this definition our method of measurement comprises the following steps: 1) Set the voltage supply at the maximum operating value -20% 2) Apply a input signal in the form of a 1KHz tone burst of 1 sec duration; the repetition period of the signal pulses is > 60 sec 3) The output voltage is measured 1 sec from the start of the pulse 4) Increase the input voltage until the output signal show a THD = 10% 5) The music power is then V2out/R1, where Vout is the output voltage measured in the condition of point 4) and R1 is the rated load impedance The target of this method is to avoid excessive dissipation in the amplifier. 3/6 TDA7245A Figure 3: Output Power vs. Supply Voltage 4/6 Figure 4: Output Power vs. Supply Voltage TDA7245A POWERDIP 18 PACKAGE MECHANICAL DATA mm DIM. MIN. a1 0.51 B 0.85 b b1 TYP. inch MAX. MIN. TYP. MAX. 0.020 1.40 0.033 0.50 0.38 0.020 0.50 D 0.055 0.015 0.020 24.80 0.976 E 8.80 0.346 e 2.54 0.100 e3 20.32 0.800 F 7.10 0.280 I 5.10 0.201 L Z 3.30 0.130 2.54 0.100 5/6 TDA7245A 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. SGSTHOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. 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. 6/6