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TDA7494
10W AMPLIFIER WITH DC VOLUME CONTROL
TDA749410W AMPLIFIER WITH DC VOLUME CONTROL
10W OUTPUT POWER RL = 8Ω,
@ THD = 10% VCC = 28V
ST-BY AND MUTE FUNCTIONS
LINEAR VOLUME CONTROL DC COUPLED
WITH POWER OP AMPLIFIER
NO BOUCHEROT CELL
NO ST-BY RC INPUT NETWORK
SIGNAL LINE OUTPUT BEFORE VOLUME
CONTROLLING AND MUTING
3 SWITCHABLE VOLTAGE CONTROLLED
INPUT PINS
SINGLE SUPPLY RANGING UP TO 35V
SHORT CIRCUIT PROTECTION
THERMAL OVERLOAD PROTECTION
INTERNALLY FIXED GAIN
SOFT CLIPPING
LOW TURN-ON TURN-OFF POP NOISE
MULTIWATT 15 PACKAGE
DESCRIPTIONThe TDA7494 10W is class AB power amplifier
assembled in the @Multiwatt 15 package, spe-
cially designed for high quality sound, TV applica-
tions.
Features of the TDA7494 include volume control,
3 switchable inputs, Stand-by and mute functions.
BLOCK AND APPLICATION DIAGRAM
ABSOLUTE MAXIMUM RATINGS(1) Operation between -20 to 85 °C guaranteed by correlation with 0 to 70°C.
THERMAL DATA
PIN CONNECTION
ELECTRICAL CHARACTERISTICS (Refer to the test circuit, VS = 21V, RL = 8Ω; Rg = 50Ω;Tamb = 25°C; unless otherwise specified.)
TDA74942/12
ELECTRICAL CHARACTERISTICS (continued)
TDA7494
Figure 1: Test and Application Circuit.
Figure 2: P.C.B. and component layout.
TDA74944/12
APPLICATION SUGGESTIONSThe recommended values of the external components are those shown on the application circuit of fig-
ure 1. Different values can be used; the following table can help the designer.
TYPICAL CHARACTERISTICS: Refer to the Application Circuit of Fig.1 VS = 21V; RL = 8Ω; f = 1KHz;RS = 8Ω; Tamb = 25°C; RS = 50Ω; unless otherwise specified 10 15 20 25 30 Vs(V)
D96AU517
POUT
(W)
Figure 3: Output Power vs Supply Voltage 4 6 8 POUT(W)
(%)
D96AU518
Figure 4: Distortion vs Output Power
TDA7494
13 15 17 19 VS(V)POUT
(W)
D96AU519
Figure 5: Output Power vs Supply Voltage 4 6 POUT(W)
(%)
D96AU520
Figure 6: Distortion vs Output Power 100 1K f(Hz)
(%)
D96AU521
Figure 7: Distortion vs Frequency 100 1K f(Hz)
(%)
D96AU522
Figure 8: Distortion vs Frequency 14 18 22 26 30 VS(V)
(mA)
D96AU523
Figure 9: Quiescent Current vs Supply Voltage 14 18 22 26 30 VS(V)
VDDC
(V)
D96AU524
Figure 10: Quiescent Output Voltage vs SupplyVoltage
TDA74946/12
