SA7496L
2-CH AUDIO POWER AMPLIFIER(2W X 2)
DESCRIPTION
The SA7496L is a monolithic two channels power amplifier, it is a
stereo 2W+2W class AB output stage in the DIP20 and SOP20 package,
specially designed for high quality sound, TV applications.
It also has the features of linear volume control, stand-by and mute
functions.
SOP-20-375-1.27
FEATURES
* Max output power: 2W+2W(RL=8 )
* ST-BY & MUTE functions
* Linear volume control DC Coupled with power OP.AMP
* Short circuit protection
* Thermal overload protection
* Internally fixed gain
* Variable output after volume control circuit
DIP-20-300-2.54 DIP-20IH-300-2.54
ORDERING INFORMATION
Device
SA7496
SA7496L
SA7496LS
Package
DIP-20IH-300-2.54
DIP-20-300-2.54
SOP-20-375-1.27
APPLICATIONS
* Quality sound
* TV applications
* PC Speakers
* Sound processors
* Mini and micro audio receivers
BLOCK DIAGRAM
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2
2006.12.31
Page 1 of 10
SA7496L
ABSOLUTE MAXIMUM RATINGS
Characteristics
DC Supply Voltage
Maximum Input Voltage
Operating Temperature
Storage Temperature
Junction Temperature
Volume Control DC Voltage
SA7496
Thermal Resistance SA7496L
SA7496LS
Symbol
V
CC
V
IN
T
opr
T
stg
T
j
V
6
Rth
(j-a)
1
Rth
(j-a)
2
Rth
(j-a)
3
Ratings
26
8
0 ~ + 70
-40 ~ +150
-40 ~ +150
7
50
70
80
Unit
V
V
PP
°C
°C
°C
V
°C/W
°C/W
°C/W
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, VCC =14V, RL=8 , Rg =50Ω, f=1KHz, Tamb=25°C)
Characteristics
Supply Voltage Range
Supply Current
Output DC Offset Referred to
SVR Potential
Quiescent Output Voltage
Output Power
Closed Loop Gain
Monitor Out Gain
Attenuation at Minimum Volume
Total Harmonic Distortion
Output Peak Current
Bandwidth
Slew Rate
Input Resistance
Variable Output Resistance
Thermal Muting
Thermal Shut-down
Symbol
V
CC
I
CC
Test condition
SA7496L/SA7496LS
SA7496*
Class AB
Min.
10
10
--
--
--
1.6
--
28.5
-1.5
80
--
0.7
--
5
22.5
--
--
--
1kHz; max volume
1kHz; max attenuation
35
55
Typ.
--
--
25
200
7
2
1.3
30
0
--
--
0.9
0.6
8
30
30
150
160
39
65
Max.
16
18
50
--
--
--
--
31.5
1.5
--
0.4
--
--
--
--
100
--
--
--
--
Unit
V
V
mA
mV
V
W
W
dB
dB
dB
%
A
MHz
V/us
kΩ
Ω
°C
°C
dB
dB
DCV
OS
No input Signal
V
O
P
O
Gv
Gvline
THD
I
peak
BW
SR
R
i
TM
TS
--
THD=10%; R
L
=8Ω
THD=1%; R
L
=8Ω
Vol Ctrl > 4.5V
Vol Ctrl > 4.5V;Zload>30kΩ
Gv=30dB; P
o
=1W;f=1KHz
(Internally limited)
--
--
--
--
--
f
CSVR 470µF; V
RIP
1Vrms
f
CSVR 470µF; V
RIP
1Vrms
Amin Vol Vol Ctrl <0.5V
Rvar out --
Supply Voltage Rejection
SVR
(To be continued)
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2
2006.12.31
Page 2 of 10
SA7496L
(Continued)
Characteristics
Symbol
f
Test condition
20Hz ~22KHz
20Hz ~22KHz
20Hz ~22KHz, Mute
Play, max volume
Min.
--
--
--
3.5
--
3.5
--
50
--
--
--
--
--
Typ.
500
100
60
--
--
--
--
65
0.6
1
0.2
1
0.2
Max.
800
250
150
--
1.5
--
1.5
--
1
5
2
5
2
Unit
µV
µV
µV
V
V
V
V
dB
mA
µA
µA
µA
µA
Total Output Noise
eN
f
f
Play, max attenuation
MUTE STAND-BY & INPUT SELECTION FUNCTIONS
Stand-by ON Threshold
Stand-by OFF Threshold
Mute ON Threshold
Mute OFF Threshold
Mute Attenuation
Quiescent Current @ Stand-by
Mute Bias Current
V
ST ON
--
V
ST OFF
--
V
M ON
--
V
M OFF
--
A
MUTE
--
I
qST-BY
--
I
muteBIAS
Mute
Play
Standby on V
ST-BY
=5V,
Standby Bias Current
I
muteBIAS
V
MUTE
=5V
Play or Mute
* Because the heat dispersion of package DIP-20IH-300-2.54 is better the other two, the maximum operating
voltage of SA7496 is higher than that of SA7496L/SA7496LS. But it is advisable not over 18V advisable.
PIN CONFIGURATION
PIN DESCRIPTION
Pin No.
1
2
3
Pin name
GND
GND
GND
Ground
Ground
Ground
(To be continued)
Description
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2
2006.12.31
Page 3 of 10
SA7496L
(Continued)
Pin No.
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Pin name
INL
VAROUT_L
VOLUME
VAROUT_R
NC
INR
SVR
STBY
MUTE
GND
OUTR
V
CC
V
CC
OUTL
GND
GND
GND
Left input
Left output_1
Volume control
Left output_2
Not connect
Right input
Supply voltage rejection
Stand by pin
MUTE pin
Ground
Right output
Supply voltage
Supply voltage
Left output
Ground
Ground
Ground
Description
FUNCTION DESCRIPTION
The SA7496L is a semiconductor integrated circuit consisting of two channel power amplifiers, which is a
stereo class AB power amplifier, specially designed for high quality sound, TV applications, which include linear
volume control, stand-by and mute functions.
There are the MUTE and STAND-BY turn on and off conversion circuit in order to eliminate the plops noise.
When the both voltages are low and the operation will be normal. While the STAND-BY is high, the circuit will
turn off the bias current, so it will be the stand-by state. Also when the STAND-BY is low and the MUTE is high,
the circuit will be the mute state, in this operation, the bias current of the signal channels will be shutdown.
The SA7469L built-in a DC volume control circuit. While the voltage of pin6 is 0, the output voltage will be 0;
and the gain will be increased as the pin6’ voltages go up.
s
In this circuit, as the operation temperature’ increase, the transistor’ threshold limit value will decrease, when
s
s
the temperature up to 150
°C,
the thermal protection circuit will turn on and the signal channel will be shutdown.
MUTE & STAND-BY TRUTH TABLE
MUTE
H
L
H
L
ST-BY
H
H
L
L
Operating State
STANDBY
STANDBY
MUTE
PLAY
Note: “ denotes the voltage is larger than 3.5V, and “ denotes the voltage is lower than 1.5V.
H”
L”
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2
2006.12.31
Page 4 of 10
SA7496L
STAND-BY AND MUTE FUNCTIONS DIAGRAM
V
S
(V)
STBY(V)
5
V
SVR
(V)
2.5V
MUTE(V)
5
INPUT(mV)
V
OUT
(V)
OFF STBY MUTE
PLAY
MUTE STBY OFF
IQ(mA)
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2
2006.12.31
Page 5 of 10
嵌入式系统
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
