UTC TDA7496L
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R107-020,A
2W+2W AMPLIFIER WITH DC
VOLUME CONTROL
DESCRIPTION
The UTC TDA7496L is a stereo 2W+2W class AB power
amplifier , specially designed for high quality sound, TV and
Monitor applications. Features of the UTC TDA7496L include
linear volume control, Stand-by and mute functions.
FEATURES
*2W+2W output power: R
L
=8@THD=10%,Vcc=14V
*ST-BY and mute functions
*Low turn-on turn-off pop noise
*Linear volume control DC coupled with power op. amp.
*No boucherot cell
*No ST-BY RC input network
*Single supply ranging up to 15V
*Short circuit protection
*Thermal overload protection
*Internally fixed gain
*Soft clipping
*Variable output after volume control circuit
DIP-20
SOP-20
BLOCK DIAGRAM
VAROUT_R
Vs
GND
1,2,3,13
18,19,20
INR
470nF
30K
VOLUME
+
-
OP AMP
7
15,16
14
11
MUTE/STBY
PROTECTIONS
VOLUME
1000F
OUTR
STBY
MUTE
1F
10K
OUTL
1000F
S1 ST-BY
S2 MUTE
S_GND
+5V
+5V
+
-
OP AMP
12
17
5
6
30K
4
10
VOLUME
VAROUT_L
INL
470nF
SVR
470F
100nF
300K
+5V
60K
UTC TDA7496L
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R107-020,A
ABSOLUTE MAXIMUM RATINGS
PARAMETER SYMBOL
RATING
UNIT
DC Supply Voltage
Vs
26
V
Maximum Input Voltage
V
IN
8
Vpp
Total Power Dissipation (Tcase =60)
Ptot 6 W
Ambient Operating Temperature
Ta
0 ~ 70
Junction Temperature
Tj
-40 ~ 150
Storage Temperature
Tstg
-40 ~ 150
Volume CTRL DC voltage
V6
7
V
PIN CONNECTION
GND
GND
GND
INL
VAROUT_L
VOLUME
VAROUT_R
N.C.
INR
SVR
GND
GND
GND
OUTL
Vs
Vs
OUTR
GND
MUTE
STBY
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
ELECTRICAL CHARACTERISTICS
(Refer to the test circuit V
S
= 14V, R
L
= 8, Rg = 50, T
a
= 25C).
PARAMETER SYMBOL
TEST
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Supply Voltage Range
Vs
10
18
V
Quiescent Current
I
Q
25 50 mA
Output DC Offset Referred to
SVR Potenial
DCVos
No Input Signal
200 mV
Quiescent Output Voltage
Vo
7
V
Output Power
Po
THD=10%, RL=8
THD=1%, RL=8
1.6 2
1.3
W
Total Harmonic Distortion
THD
Gv=30dB, Po=1W, f=1KHz
0.4
%
Output Peak Current
Ipeak
(internally limited)
0.7
0.9
A
Input Signal
Vin
2.8
Vrms
Closed Loop Gain
Gv
Vol Ctrl>4.5V
28.5
30
31.5
dB
Monitor Out Gain
Gvline
Vol Ctrl>4.5V, Zload>30k
-1.5 0 1.5 dB
Attenuation at Minimum
Volume
Amin VoL
Vol Ctrl<0.5V
80 dB
Bandwidth BW
0.6
MHz
UTC TDA7496L
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R107-020,A
PARAMETER SYMBOL
TEST
CONDITIONS
MIN.
TYP.
MAX.
UNIT
f=20Hz to 22KHz
Play,max volume
500
800 V
f=20Hz to 22KHz
Play,max attenuation
100
250 V
Total Output Noise
e
N
f=20Hz to 22KHz
Mute
60
150 V
Slew Rate
SR
5
8
V/s
Input Resistance
Ri
22.5
30
k
Variable Output Resistance
Rvar Out
30
100
Variable Output Load
Rload var Out
2
k
f=1kHz, max volume
C
SVR
=470F, V
RIP
=1V
rms
35 39
Supply Voltage Rejection
SVR
f=1kHz, max attenuation
C
SVR
=470F, V
RIP
=1V
rms
55 65
dB
Thermal Muting
T
M
150
C
Thermal Shut-down
Ts
160
C
MUTE STAND-BY&INPUT SELECTION FUNCTIONS
Stand-by ON Threshold
V
ST ON
3.5
V
Stand-by OFF Threshold
V
ST OFF
1.5
V
Mute ON Threshold
V
M ON
3.5
V
Mute OFF Threshold
V
M OFF
1.5
V
Quiescent Current@Stand-by
I
Q
ST-BY
0.6
1
mA
Mute Attenuation
A
MUTE
50
65
dB
Stand by on V
ST-BY
=5V
V
MUTE
=5V
80
A
Stand-by bias current
I
stbyBIAS
Play or Mute
-20
-5
A
Mute
1
5
A
Mute bias current
I
muteBIAS
Play
0.2
2
A
APPLICATION SUGGESTIONS
The recommended values of the external components are those shown on the application circuit of figure 1.
Different values can be used, the following table can help the designer.
COMP
ONENT
SUGGESTION
VALUE
PURPOSE
LARGER THAN
SUGGESTION
SMALLER THAN
SUGGESTION
R1
300K
Volume control circuit
Larger volume regulation time
Smaller volume regulation
time
R2
10K
Mute time constant
Larger mute on/off time
Smaller mute on/off time
P1
50K
Volume control circuit
C1
1000F
Supply voltage bypass
Danger of oscillation
C2
470nF
Input DC decoupling
Lower low frequency cutoff
Higher low frequency cutoff
C3
470nF
Input DC decoupling
Lower low frequency cutoff
Higher low frequency cutoff
C4
470nF
Ripple rejection
Better SVR
Worse SVR
C5
100nF
Volume control time
Constant
Larger volume regulation time
Smaller volume regulation
time
C6
1000F
Output DC decoupling
Lower low frequency cutoff
Higher low frequency cutoff
UTC TDA7496L
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
4
QW-R107-020,A
COMP
ONENT
SUGGESTION
VALUE
PURPOSE
LARGER THAN
SUGGESTION
SMALLER THAN
SUGGESTION
C7
1F
Mute time costant
Larger mute on/off time
Smaller mute on/off time
C8
1000F
Output DC decoupling
Lower low frequency cutoff
Higher low frequency cutoff
C9
100nF
Supply voltage bypass
Danger of oscillation
Vs
1,2,3,13
18,19,20
INR
C2
470nF
30K
VOLUME
+
-
OP AMP
7
15,16
14
11
MUTE/STBY
PROTECTIONS
VOLUME
1000F
C8
C7
1F
R2 10K
OUTL
C6
1000F
S1 STBY
S2 MUTE
S_GND
+5V
+5V
+
-
OP AMP
12
17
5
6
30K
4
10
VOLUME
VAROUT_L
INL
C3
470nF
SVR
C4
470F
C5
100nF
R1
300K
+5V
60K
VOL
P1
50K
LOG
TP1
OUTR
PW_GND
C9
0.1F
C1
1000F
+Vs
PW_GND
FIGURE 1. APPLICATION CIRCUIT
VAROUT R
9
PW_GND
MUTE STAND-BY TRUTH TABLE
MUTE ST-BY
OPERATING
CONDITION
H H
STANDBY
L H
STANDBY
H L
MUTE
L L
PLAY
UTC TDA7496L
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
5
QW-R107-020,A
TURN ON/OFF SEQUENCES (FOR OPTIMIZING THE POP PERFORMANCES)
(A) USING MUTE AND STAND-BY FUNCTIONS
Vs(V)
ST-BY
pin#11(V)
VSVR
pin#10(V)
2.5
MUTE
pin#12(V)
5
INPUT
(mV)
VOUT
(V)
IQ
(mA)
OFF
STBY MUTE
PLAY
MUTE STBY
OFF
(B) USING ONLY THE MUTE FUNCTION
To simplify the application, the stand-by pin can be connected directly to Ground. During the ON/OFF transitions is
recommend to respect the following conditions.
At the turn-on, the transition mute - play must be made when the SVR pin is higher than 2.5V.
At the turn-off, the TDA7496L must be brought to mute from the play condition when the SVR pin is higher than
2.5V.
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