SA7269
2-CH AUDIO POWER AMPLIFIER(10W X2)
DESCRIPTION
The SA7269 is a monolithic integrated circuit in HSIP package,
intended for use as dual audio frequency class AB amplifier.
FEATURES
* Wide supply voltage range up to 40V ABS MAX.
* Split supply operation.
* High output power: 10+10W @ THD=10%, RL=8 , Vs=±14V
* Mute/stand-by function.
* Few external components.
* Short circuit protection.
* Thermal overload protection.
HSIP-15
HSIP-11
APPLICATIONS
* Hi-Fi music centers
* Stereo TV sets
ORDERING INFORMATION
Part No.
SA7269
SA7269A
Package
HSIP-11
HSIP-15
BLOCK DIAGRAM
Note: Figures for the SA7269.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2
2006.05.25
Page 1 of 11
SA7269
ABSOLUTE MAXIMUM RATING
Characteristics
DC Supply Voltage
Output Peak Current (Internally Limited)
Power Dissipation Tcase=70°C
Storage And Junction Temperature
Supply voltage to guarantee short-circuit
protection
Thermal Resistance From Junction To Case
(Max)
normal.
Symbol
V
s
I
o
P
tot
T
stg
, T
j
V
s(sc)
R
th(j-c)
Rating
44
3
40
-40~+150
±18(*)
2
Unit
V
A
W
°C
V
°C/W
(*)Maximum supply voltage to guarantee short-circuit to
±
Vs is
±18V,
and to GND short-circuit protection is
ELECTRICAL CHARACTERISTICS
(Refer to the test circuit, Vs±14V; R
L
=8Ω; Rs=50Ω; Gv=30dB; f=1KHz; T
amb
=25°C, unless otherwise specified.)
Characteristics
Supply Range
Total Quiescent Current
Input Offset Voltage
Non Inverting Input Bias Current
Symbol
V
s
I
q
V
os
I
b
THD=10%;
R
L
=8Ω;
Output Power
P
o
V
s
=±12.5V; R
L
=4Ω
THD=1%;
R
L
=8Ω;
V
s
=±12.5V; R
L
=4Ω
RL=8Ω; Po=1W; f=1KHz
R
L
=8Ω;
P
o
=0.1~5W;
Total Harmonic Distortion
THD
f=100Hz~15KHz
R
L
=4Ω; P
o
=1W; f=1KHz
R
L
=4Ω; V
s
=±10V;
P
o
=0.1~5W;
f=100Hz~15KHz
Cross Talk
Slew Rate
Open Loop Voltage Gain
Total Input Noise
CT
SR
GV
e
N
A curve
f=20Hz~22KHz
f=1KHz
f=10KHz
50
6.5
70
60
8
80
3
4
8
dB
dB
V/µs
dB
µV
µV
0.02
1
%
%
7.5
7.5
0.03
0.7
W
W
%
%
8
7.5
10
10
W
W
-25
500
Test conditions
Min.
±5
50
Typ.
Max.
±20
100
+25
Unit
V
mA
mV
nA
(To be continued)
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
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SA7269
(Continued)
Characteristics
Input Resistance
Supply Voltage Rejection (each
channel)
Thermal
Shut-down
Junction
Temperature
Mute Function [ref: +Vs]
Mute /Play Threshold
Mute Attenuation
Stand-by Function [ref: +Vs]
Stand-by /Mute Threshold
Stand-by Attenuation
Quiescent Current @ Stand-by
Symbol
Ri
SVR
Tj
Test conditions
Min.
15
Typ.
20
60
145
Max.
Unit
KΩ
dB
°C
Fr=100Hz; V
ripple
=0.5Vrms
VT
MUTE
AM
VT
ST-BY
A
ST-BY
Iq
ST-BY
-7
60
-3.5
-6
70
-2.5
110
3
-5
V
dB
-1.5
6
V
dB
mA
PIN CONFIGURATION
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2
2006.05.25
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SA7269
PIN DESCRIPTION
Pin No.
HSIP-11
1
2
3
4
5
6
7
8
9
10
11
HSIP-15
2
3
5
6
7
8
9
10
12
13
14
1,4,11,15
Pin Name
-Vs
OUT 1
+Vs
OUT 2
MUTE / ST-BY
-Vs
IN+(2)
IN-(2)
GND
IN-(1)
IN+(1)
NC
I/O
--
O
--
O
I
--
I
I
--
I
I
--
Pin Description
Negative power
Output1
Positive power
Output2
Mute /stand-by function
Negative power
Inverting Input 2
Non inverting input 2
Ground
Non inverting input 1
Inverting input 1
Not connected
FUNCTION DESCRIPTION
MUTE STAND-BY FUNCTION
The MUTE/ST-BY controls the amplifier status by two different thresholds, referred to +Vs.
Ø
Ø
Ø
When MUTE/ST-BY higher than = +Vs - 2.5V the amplifier is in Stand-by mode and the final stage
generators are off.
When MUTE/ST-BY is between +Vs - 2.5V and +Vs- 6V the final stage current generators are
switched on and the amplifier is in mute mode
When MUTE/ST-BY is lower than +Vs - 6V the amplifier is play mode.
Power Dissipation and Heat Sinking
The SA7269 must always be operated with a heat sink. In order to determine the appropriate heat sink for a
given application, the power dissipation of the SA7269 in that application must be known. When the load is
resistive, the maximum average power that the IC will be required to dissipate is approximately:
P
D(MAX)
=Vs
2
/π
2
R
L
+PQ
Where VS is the total power supply voltage across the SA7269, RL is the load resistance PQ is the quiescent
power dissipation of the amplifier. The above equation is only an approximation which assume an “
ideal”class B
output stage and constant power dissipation in all other parts of the circuit. The curves of “
Power Dissipation vs.
Power Output”give a better representation of the behavior of the SA7269 with various power supply voltages and
resistive loads. As an example, if the SA7269is operated on a ±14V power supply with a resistive load of 8Ω, it
can develop up to 11.5W of internal power dissipation. If the die temperature is to remain below 150°C for
ambient temperatures up to 50°C, the total junction-to-ambient thermal resistance must be less than:
(150°C 50°C)/11.5W
8.7°C/W
Using Rth(j-c) = 2°C /W, the sum of the case-to-heat-sink interface thermal resistance and the heat-sink-to-
ambient thermal resistance must be less than 6.7°C/W. The case-to-heat-sink thermal resistance of the HSIP-11
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
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REV:1.2
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SA7269
package varies with the mounting method used. A metal-to-metal interface will be about 1°C /W if lubricated, and
about 1.2°C /W if dry.
If a mica insulator is used, the thermal resistance will be about 1.6°C /W lubricated and 3.4°C /W dry. For this
example, we assume a lubricated mica insulator between the SA7269 and the heat sink. The heat sink thermal
resistance must then be less than:
8.7°C/W-2°C/W-1.6°C/W
5.1°C/W
The thermal requirements can become more difficult when an amplifier is driving a reactive load. For a given
magnitude of load impedance, a higher degree of reactance will cause a higher level of power dissipation within
the amplifier. As a general rule, the power dissipation of an amplifier driving a 60º reactive load (usually
considered to be a worst-case loudspeaker load) will be roughly that of the same amplifier driving the resistive
part of that load. For example, a loudspeaker may at some frequency have an impedance with a magnitude of 8Ω
and a phase angle of 60º. The real part of this load will then be 4Ω, and the amplifier power dissipation will
roughly follow the curve of power dissipation with a 4Ω load.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2
2006.05.25
Page 5 of 11
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