TDA7494 STMicroelectronics, TDA7494 Datasheet - Page 5

• Manufacturer Part Number: TDA7494
• Description: IC AMP AUDIO PWR 10W MULTIWATT15
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TDA7494

• Output Type: 1-Channel (Mono)
• Max Output Power X Channels @ Load: 10W x 1 @ 8 Ohm
• Voltage - Supply: 11 V ~ 35 V
• Features: Depop, Input Multiplexer, Mute, Short-Circuit and Thermal Protection, Standby, Volume Control
• Mounting Type: Through Hole
• Package / Case: Multiwatt-15 (Vertical, Bent and Staggered Leads)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

APPLICATION SUGGESTIONS
The 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 V
R
Figure 3: Output Power vs Supply Voltage
S
COMPONENT
P
= 8 ; Tamb = 25°C; R
(W)
OUT
14
12
10
8
6
4
2
0
C10
R1
R2
R3
R4
R5
P1
C1
C2
C3
C4
C5
C6
C7
C8
C9
5
10
SUGGESTION
15
VALUE
1000 F
100K
100K
3.3K
3.3K
100nF
470nF
470nF
470nF
300nF
300nF
470 F
470 F
10K
50K
1 F
d=10%
20
S
= 50 ; unless otherwise specified
25
d=1%
Input switch circuit
Input switch circuit
Input switch time
constant
Volume control time
constant
Mute time constant
Volume control circuit
Supply voltage bypass
Supply voltage bypass
Input DC decoupling
Input DC decoupling
Input DC decoupling
Input- switch time
constant
Volume control time
constant
Ripple Rejection
Mute time constant
Output DC decoupling
30
D96AU517
PURPOSE
Vs(V)
Figure 4: Distortion vs Output Power
Vpin #2 shifted downward Vpin #2 shifted upward
Vpin #2 shifted upward
Larger Input Switch Time
Larger Volume
Regulation Time
Larger mute on/off time
Lower low frequency
cutoff
Lower low frequency
cutoff
Lower low frequency
cutoff
Larger-Input- switch time
Larger volume regulation
time
Better SVR
Larger mute on/off time
Lower low frequency
cutoff
0.01
(%)
0.1
d
1
0
LARGER THAN
SUGGESTION
2
V
R
S
L
S
=8
=28V
4
= 21V; R
Vpin #2 shifted downward
Smaller input switch time
Smaller volume
regulation time
Smaller mute on/off time
Danger of oscillation
Danger of oscillation
Higher low frequency
cutoff
Higher low frequency
cutoff
Higher low frequency
cutoff
Smaller input- switch time
Smaller volume regulation
time
Worse SVR
Smaller mute on/off time
Higher low frequency
cutoff
f=15KHz
6
SMALLER THAN
SUGGESTION
L
= 8 ; f = 1KHz;
8 P
f=1KHz
D96AU518
TDA7494
OUT
(W)
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