. LOW CROSSOVER DISTORSION LOW QUIESCENT CURRENT BRIDGE OR STEREO CONFIGURATION

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1 DUAL LOW-VOLTAGE POWER AMPLIFIER SUPPLY VOLTAGE DOWN TO 1.8V. LOW CROSSOVER DISTORSION LOW QUIESCENT CURRENT BRIDGE OR STEREO CONFIGURATION MINIDIP ORDERING NUMBER : DESCRIPTION The is a monolithic integrated circuit in 8 lead Minidip package. It is intended for use as dual audio power amplifier in portable cassette players and radios. PIN CONNECTION (Top view) September /11

2 SCHEMATIC DIAGRAM ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit V s Supply Voltage 15 V I o Peak Output Current 1 A P tot Total Power Dissipation at T amb = 50 C at T case = 50 C T stg, T j Storage and Junction Temperature 40, C W W THERMAL DATA Symbol Parameter Value Unit R th j-amb Thermal Resistance Junction-ambient Max. 100 C/W R th j-case Thermal Resistance Junction-pin (4) Max. 70 C/W 2/11

3 ELECTRICAL CHARACTERISTICS (VS = 6V, Tamb = 25 o C, unless otherwise specified) Symbol Parameter Test Conditions Min. Typ. Max. Unit STEREO (test circuit of Figure 1) V s Supply Voltage V V o Quiescent Output Voltage 2.7 V V s = 3V 1.2 V I d Quiescent Drain Current 6 9 ma I b Input Bias Current 100 na P o Output Power (each channel) mw (f = 1kHz, d = 10%) R L = 32Ω V S = 9V 90 V S = 4.5V 15 V S = 2V R L = 16Ω R L = 8Ω R L = 4Ω V S = 9V V S = 4.5V d Distortion (f = 1kHz) R L = 32Ω P o = 40mW R L = 16Ω P o = 75mW R L = 8Ω P o = 150mW G v Closed Loop Voltage Gain f = 1kHz db G v Channel Balance ± 1 db R i Input Resistance f = 1kHz 100 kω e N Total Input Noise R s = 10kΩ B = Curve A B = 22Hz to 22kHz SVR Supply Voltage Rejection f = 100Hz, C1 = C2 = 100µF db C s Channel Separation f = 1kHz 50 db BRIDGE (test circuit of Figure 2) V s Supply Voltage V I d Quiescent Drain Current R L = 6 9 ma V os Output Offset Voltage R L = 8Ω ± 50 mv (between the outputs) I b Input Bias Current 100 na P o Output Power (f = 1kHz, d = 10%) mw R L = 32Ω V S = 9V 1000 V S = 4.5V V S = 2V R L = 16Ω V S = 9V R L = 8Ω V S = 4.5V R L = 4Ω V S = 4.5V V S = 2V 80 d Distortion P o = 0.5W, R L = 8Ω, f = 1kHz 0.2 % G v Closed Loop Voltage Gain f = 1kHz 39 db R i Input Resistance f = 1kHz 100 kω e N Total Input Noise R s = 10kΩ B = Curve A B = 22Hz to 22kHz SVR Supply Voltage Rejection f = 100Hz 40 db % % % µv µv µv µv 3/11

4 Figure 1 : Test Circuit (Stereo) Figure 2 : Test Circuit (Bridge) Figure 3 : P.C. Board and Components Layout of the Circuit of Figure 1 Figure 4 : P.C. Board and Components Layout of the Circuit of Figure 2 4/11

5 Figure 5 : Quiescent Current versus Supply Voltage Figure 6 : Supply Voltage Rejection versus Frequency Figure 7 : Output Power versus Supply Voltage (THD = 10%, f = 1kHz Stereo) Figure 8 : Distorsion versus Output Power (Stereo) Figure 9 : Distorsion versus Output Power (Stereo) Figure 10 : Output Power versus Supply Voltage (Bridge)

6 Figure 11 : Distorsion versus Output Power (Bridge) Figure 12 : Total Power Dissipation versus Output Power (Bridge) Figure 13 : Total Power Dissipation versus Output Power (Bridge) Figure 14 : Total Power Dissipation versus Output Power (Bridge) Figure 15 : Total Power Dissipation versus Output Power (Bridge) 6/11

7 Figure 16 : Typical Application in Portable Players Figure 17 : Application in Portable Radio Receivers 7/11

8 Figure 18 : Portable Radio Cassette Players Type TDA 7220 TDA 7211A TEA 1330 TDA 7282 TDA 2822M Supply Voltage 1.5 V to 6 V 1.2 V to 6 V 3 V to 15 V 1.5 V to 6 V 1.8 V to 15 V Figure 19 : Portable Stereo Radios Type TDA 7220 TDA 7211A TEA 1330 TDA 2822M Supply Voltage 1.5 V to 6 V 1.2 V to 6 V 3 V to 15 V 1.8 V to 15 V Figure 20 : Low Cost Application in Portable Players (using only one 100µF output capacitor) 8/11

9 Figure 21 : 3V Stereo Cassette Player with Motot Speed Control 9/11

10 mm inch DIM. MIN. TYP. MAX. MIN. TYP. MAX. A OUTLINE AND MECHANICAL DATA a B b b D E e e e F I L Z Minidip 10/11

TDA7231A 1.6W AUDIO AMPLIFIER OPERATING VOLTAGE 1.8 TO 15 V LOW QUIESCENT CURRENT HIGH POWER CAPABILITY LOW CROSSOVER DISTORTION SOFT CLIPPING

TDA7231A 1.6W AUDIO AMPLIFIER OPERATING VOLTAGE 1.8 TO 15 V LOW QUIESCENT CURRENT HIGH POWER CAPABILITY LOW CROSSOVER DISTORTION SOFT CLIPPING 1.6 AUDIO AMPLIFIER OPERATING VOLTAGE 1.8 TO 15 V LO QUIESCENT CURRENT. HIGH POER CAPABILITY LO CROSSOVER DISTORTION SOFT CLIPPING DESCRIPTION The is a monolithic integrated circuit in 4 + 4 lead minidip