ICs for TV
AN7522
Dual 3-W BTL audio power amplifier
■
Overview
AN7522 is an audio power amplifier IC for the stereo system. In the BTL (balanced transformerless) method, fewer
external parts and easier design for applications are required.
■
Applications
•
Televisions, audio equipment, personal computers, and active speakers
■
Package
•
HSIP012-P-0000E
■
Block Diagram
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10
Ch.2 output
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11
GND
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Ch.2 output
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Standby
SDB00117AEB
Ma
Ch.1 output 2
int
en
an
GND 3
(Ch.1 output)
ce
/D
4
is
Ch.1 output
c
V
CC
1
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■
Features
•
3-W output (8
Ω)
with supply voltage of 8 V
•
On-chip standby function
•
On-chip volume function
on
5
tin
ue
Publication date: June 2006
1
AN7522
■
Pin Descriptions
Pin No.
1
2
3
4
5
6
Descriptions
Supply voltage
Ch.1
+
output
Ground (output ch.1)
Ch.1
−
output
Standby (standby state if this pin is open.)
Pin No.
7
8
9
10
11
12
Descriptions
Ground (input)
Ch.2 input
Volume (max. volume if this pin is open.)
Ch.2
−
output
Ground (output ch.2)
Ch.2
+
output
M
ain
Di
sc te
on na
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Ch.1 input
■
Absolute Maximum Ratings
Parameter
Supply voltage
*2
Supply current
Power dissipation
*3
Operating ambient temperature
*1
Storage temperature
*1
Note) *1: Except for the operating ambient temperature and storage temperature, all ratings are for T
a
=
25°C.
*2: At no signal.
*3: The power dissipation shown is the value for T
a
=
70°C.
■
Recommended Operating Range
Parameter
Supply voltage
Symbol
V
CC
■
Electrical Characteristics at V
CC
=
8.0 V, R
L
=
8
Ω,
f
=
1 kHz, T
a
=
25°C
±
2°C
Parameter
Symbol
I
CQ
on
Quiescent circuit current
Standby current
I
STB
ce
Output noise voltage
*
Voltage gain
V
NO
G
V
Total harmonic distortion
Maximum output power
Ripple rejection ratio
*
Output offset voltage
Volume attenuation rate
*
Channel balance 1
Channel balance 2
Intermediate voltage gain
Channel crosstalk
THD
P
O1
RR
V
OFF
Att
CB1
CB2
G
VM
CT
Note) *: In measuring, the filter for the range of 15 Hz to 30 kHz (12 dB/OCT) is used.
2
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V
CC
I
CC
P
D
14
V
2.0
A
1.92
W
T
opr
T
stg
−25
to
+70
°C
−55
to
+150
°C
Range
Unit
V
3.5 to 13.5
Conditions
Min
Typ
45
1
Max
100
10
Unit
mA
µA
V
IN
=
0 mV, Vol.
=
0 V
V
IN
=
0 mV, Vol.
=
0 V
R
g
=
10 kΩ, Vol.
=
0 V
0.10
33
0.4
35
P
O
=
0.5 W, Vol.
=
1.25 V
31
dB
%
P
O
=
0.5 W, Vol.
=
1.25 V
0.10
3.0
50
0
85
0
0
23.5
55
0.5
THD
=
10%, Vol.
=
1.25 V
2.4
30
W
R
g
=
10 kΩ, Vol.
=
0 V,
V
R
=
1 V[rms], f
R
=
120 Hz
R
g
=
10 kΩ, Vol.
=
0 V
dB
−250
70
−1
−3
20.5
40
250
1
3
26.5
mV
dB
dB
dB
dB
dB
P
O
=
0.5 W, Vol.
=
0 V
P
O
=
0.5 W, Vol.
=
1.25 V
P
O
=
0.5 W, Vol.
=
0.6 V
P
O
=
0.5 W, Vol.
=
0.6 V
P
O
=
0.5 W, Vol.
=
1.25 V
SDB00117AEB
Symbol
Rating
Unit
/D
isc
tin
ue
mV[rms]
Ma
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AN7522
■
Terminal Equivalent Circuits at V
CC
=
8 V
Pin No.
1
2
Pin name
V
CC
Ch.1
+
output pin
Equivalent circuit
V
CC
Voltage
8V
3.6 V
(at no signal)
M
ain
Di
sc te
on na
tin nc
ue e/
d
200
Ω
50
Ω
1/2 V
CC
800
Ω
20 kΩ
3
GND
3
4
Ch.1
−
output pin
200
Ω
50
Ω
1/2 V
CC
2
an
5
Standby pin
ce
/D
isc
on
tin
ue
800
Ω
Ma
int
en
V
CC
30 kΩ
5
200
Ω
2 kΩ
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0V
V
CC
3.6 V
(at no signal)
4
20 kΩ
To the
shock sound
prevention
circuit
10 kΩ
V
RF
(≈ V
CC
)
0 V or 5 V
(Standby off at
supply 5 V.
Standby at 0.4 V
less or open.)
50 kΩ
33 kΩ
5 kΩ
12 kΩ
1/2 V
CC
10 kΩ
To the constant
current circuit
SDB00117AEB
3
AN7522
■
Terminal Equivalent Circuits at V
CC
=
8 V (continued)
Pin No.
6
Pin name
Ch.1 input pin
V
CC
50
µA
50
µA
30 kΩ
100
µA
Equivalent circuit
V
REF1
(1.4 V)
Voltage
1.4 V
(Input circuit
bias voltage is
output.)
7
GND
8
Ch.2 input pin
V
CC
50
µA
1 kΩ
8
9
Volume pin
4
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1 kΩ
1 kΩ
500
Ω
7
M
ain
Di
sc te
on na
tin nc
ue e/
d
1 kΩ
6
V
REF1
(1.4 V)
100
µA
50
µA
30 kΩ
0V
1.4 V
(Input circuit
bias voltage is
output.)
ue
/D
isc
on
tin
1 kΩ
1 kΩ
500
Ω
ce
V
CC
Ma
int
en
an
50
µA
Supply to
0 V to 1.25 V
1 kΩ
9
12 kΩ
SDB00117AEB
AN7522
■
Terminal Equivalent Circuits at V
CC
=
8 V (continued)
Pin No.
10
Pin name
Ch.2
−
output pin
Equivalent circuit
V
CC
Voltage
3.6 V
(at no signal)
M
ain
Di
sc te
on na
tin nc
ue e/
d
200
Ω
50
Ω
1/2 V
CC
800
Ω
20 kΩ
11
GND
11
12
Ch.2
+
output pin
200
Ω
50
Ω
1/2 V
CC
800
Ω
20 kΩ
10
•
Please avoid the short-circuits to V
CC
, ground, or load short-circuit.
•
Please connect the cooling fin with the GND potential.
•
The thermal shutdown circuit operates at about T
j
=
150°C. However, the thermal shutdown circuit is reset
automatically if the temperature drops.
•
Please carefully design the heat radiation especially when you take out high power at high V
CC
.
•
Please connect only the ground of signal with the signal GND of the amplifier in the previous stage.
Ma
int
en
an
■
Usage Notes
d
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Pl
ea
ne lud
se
pla m d m es
ne ain ain foll
htt visit
d d te te ow
p:/ fo
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.se ng ntin tin ty e ty ur
mi UR ue ued pe pe Pro
co L a d t ty
du
n.p bo yp pe
ct
e
life
an ut
d
as lat
cy
on es
cle
ic. t in
sta
co fo
ge
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.
/en at
/ ion
.
0V
V
CC
3.6 V
(at no signal)
12
ce
/D
isc
on
tin
ue
SDB00117AEB
5
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