TDA7263 12 +12W STEREO AMPLIFIER WITH MUTING WIDE SUPPLY VOLTAGE RANGE HIGH OUTPUT POWER 12+12W @ VS=28V, RL = 8Ω, THD=10% MUTE FACILITY (POP FREE) WITH LOW CONSUMPTION AC SHORT CIRCUIT PROTECTION THERMAL OVERLOAD PROTECTION DESCRIPTION The TDA7263 is class AB dual audio power amplifier assembled in the new Clipwatt package, specially designed for high quality sound application as HI-FI music centers and stereo TV sets. Clipwatt11 ORDERING NUMBER:TDA7263 TEST AND APPLICATION CIRCUIT March 1995 1/8 This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice. TDA7263 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Unit 35 V Supply Voltage IO Output Peak Current (repetitive f >20Hz) 2.5 A IO Output Peak Current (non repetitive, t = 100µs) 3.5 A Ptot Total Power Dissipation (Tcase = 70°C) Top Operating Temperature Range Tstg,Tj Storage & Junction Temperature PIN CONNECTION (Top view) BLOCK DIAGRAM 2/8 Value VS 25 W 0 to 70 °C -40 to 150 °C TDA7263 THERMAL DATA Symbol Rth j-case Parameter Thermal resistance junction to case Max Value Unit 3 °C/W ELECTRICAL CHARACTERISTICS (Refer to the stereo test and application circuit, VS = 28V; RL = 8Ω; Gv = 30dB; f = 1KHz; T amb = 25°C unless otherwise specified.) Symbol Parameter Test Condition VS Supply Voltage VO Quiescent Output Voltage Iq Total Quiescent Current PO Output Power (RMS) d = 10% Tamb = 85°C d = 1% Total Harmonic Distortion PO = 1W, f = 1kHz f = 100Hz to 10KHz; PO = 0.1 to 8W CT Cross Talk R S = 10KΩ; f = 1KHz RI Input Resistance d Min. Typ. 10 Max. 32 13.5 70 10 95 100 mA W W 0.2 0.5 70 R S = 10KΩ; f = 10KHz V V 12 9.5 0.02 Unit % dB 60 dB 200 KΩ fL Low Frequency Roll-off (-3dB) 40 Hz fH High Frequency Roll-off (-3dB) 80 KHz eN Total Input Noise Voltage A Curve; R S = 10KΩ 1.5 f = 22Hz to 22KHz; RS = 10KΩ SVR Tj Supply Voltage Rejection (each channel) RS = 10KΩ; f = 100Hz; Vr = 0.5V 3 45 Thermal Shutdown Junction Temperature mV 10 µV 60 dB 145 °C 1.6 V MUTE FUNCTION VTMUTE Mute Threshold VTPLAY Play Threshold ATT AM Mute Attenuation IqMUTE Quiescent Current @ Mute 1 70 4.5 V 100 dB 7 10 mA TYPICAL CHARACTERISTICS (referred to the typical Application Circuit, VS = 28V, RL = 8Ω, unless otherwise specified) Figure 1: Output Power vs. Supply Voltage Figure 2: Distortion vs. Output Power 3/8 TDA7263 Figure 3: Quiescent Current vs. Supply Voltage Figure 4: Supply Voltage Rejection vs. Frequency Figure 5: Crosstalk vs. Frequency Figure 6: Output Attenuation & Quiescent Current vs. Vpin3 Figure 7: Total Power Dissipation vs. Output Power Figure 8: Maximum allowable Power dissipation vs. Ambient Temperature 4/8 TDA7263 APPLICATION SUGGESTION The recommended values of the components are those shown on the typical application circuit. Different values can be used; the following table can help the designer. Recomm. Value Purpose R1 and R3 1.5KΩ Close loop gain setting (*) Increase of gain Decrease of gain R2 and R4 47Ω Close loop gain setting (*) Decrease of gain Increase of gain R5 and R6 4.7Ω Frequency stability Danger of oscillations C1 and C2 100nF Input DC decoupling Higher SVR Higher low frequency cutoff C3 47µF - Ripple Rejection - Mute time constant Increase of the Switch-on time - Degradation of SVR - Worse turn-off pop by muting Component C4 100nF Supply Voltage Bypass C5 1000µF Supply Voltage Bypass C6 and C7 C8 and C9 C10 and C11 47µF 0.1µF 1000µF Feedback input DC decoupling Larger Than Smaller Than Danger of oscillations Increase of the Switch-on time Danger of Switch-on time Frequency stability Danger of oscillations Output DC decoupling Higher low-frequency cut-off (*) Closed loop gain must be higher than 26dB Figure 9: P.C. Board and Component Layout (1:1 scale) Note: Use either C1, C2 (Polyester) or C1(*), C2(*) (Electrolytic) but not both. 5/8 TDA7263 BUILT-IN PROTECTION SYSTEMS THERMAL SHUT-DOWN The presence of a thermal limiting circuit offers the following advantages: 1-an overload on the output (even if it is permanent), or an excessive ambient temperature can be easily withstood. 2-the heatsink can have a smaller factor of safety compared with that of a conventional circuit. There is no device damage in the case of excessive junction temperature; if for any reason the junction temperature increases up to 145°C. the thermal shutdown simply re- 6/8 duces the output power and therefore the power dissipation. The maximum allowable power dissipation depends upon the thermal resistance junction-ambient. Figure 8 shows the dissipable power as a function of ambient temperature for different heatsink thermal resistance. SHORT CIRCUIT (AC CONDITIONS) The TDA7263 can withstand accidental short circuits across the speaker made by a wrong connection during normal play operation. TDA7263 CLIPWATT11 PACKAGE MECHANICAL DATA mm DIM. MIN. TYP. inch MAX. MIN. TYP. MAX. A 3.10 0.122 B 1.10 0.04 C 0.15 0.006 D 1.50 0.059 E 0.52 0.02 F 0.80 0.03 G 1.70 0.066 G1 17.00 0.66 H1 12.00 0.48 H3 20.00 0.79 L 17.90 0.70 L1 14.40 0.57 L2 11.00 0.43 M 2.54 0.1 M1 2.54 0.1 7/8 TDA7263 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. Specifications 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. 1995 SGS-THOMSON Microelectronics - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands - Singapore Spain - Sweden - Switzerland - Taiwan - Thaliand - United Kingdom - U.S.A. 8/8