ICs for Audio Common Use
AN5278
4.8 W
×
1 (18 V, 8
Ω)
Power Amplifier with
Volume and Tone Control
Unit : mm
s
Overview
The AN5278 is a monolithic integrated circuit designed
for 4.8 W
×
1 channel OTL (18 V, 8
Ω)
output audio power
amplifier suitable for TV application.
19.9±0.1
18.3±0.25
φ2.65±0.1
8.4±0.25
5.8±0.25
1.5±0.25
6.3
±0.3
7.1
±0.25
3.75±0.25
0.5
±0.1
1.2
±0.25
15.0
•
Few external components :
• No boucherot cells (output C, R)
• No bootstrap capacitors
•
Built-in DC mute of input pin during power-OFF
•
Operating voltage range 12 V to 26 V (18 V typ.)
0.1±0.05
5.6±0.25
s
Applications
•
TV
HSIP009-P-0000
s
Block Diagram
Pre
amp.
10 kΩ
AC
mute
Tone
Volume
10 kΩ
300
Ω
DC
mute
5
6
7
8
9
1
2
3
4
Vol.
RF
NF
GND
In
LF
Tone
Out
V
CC
1.7
±0.25
1.7±0.25
+0.1
0.45
–0.05
2.54
s
Features
9
8
7
6
5
4
3
2
1
φ3.3±0.1
22.3±0.3
1
AN5278
s
Pin Descriptions
Pin No.
1
2
3
4
5
6
7
8
9
Sound input
Low frequency input
Tone control
Volume control
Ripple filter
Negative feedback
GND
Sound output
V
CC
Description
ICs for Audio Common Use
s
Absolute Maximum Ratings
Parameter
Supply voltage
*2
Supply current
Power dissipation
*3
Operating ambient temperature
*1
Storage temperature
*1
Symbol
V
CC
I
CC
P
D
T
opr
T
stg
Rating
35.0
2
1.6
−20
to
+70
−55
to
+150
Unit
V
A
W
°C
°C
Note) *1 : T
a
=
25
°C
except operating ambient temperature and storage temperature.
*2 : Without input signal, V
CC
is up to 35 V.
*3 : Power dissipation of the package at T
a
=
70
°C.
s
Recommended Operating Range
Parameter
Supply voltage
Symbol
V
CC
Range
12 to 26
Unit
V
2
ICs for Audio Common Use
AN5278
s
Electrical Characteristics at V
CC
=
18 V, R
L
=
8
Ω,
f
=
1 kHz, Vol.
=
5.0 V, Tone
=
2.5 V, T
a
=
25
°C
Parameter
Quiescent current
Voltage gain
Total harmonic distortion
Max. output power
Max. output attenuation
Symbol
I
CQ
G
V
THD
P
Omax
Att
max
Conditions
No input signal
Measure V
CC
current
V
O
=
1 V[rms]
G
V
=
20 log (V
O
/V
IN
)
V
O
=
1 V[rms]
BPF : 400 Hz to 30 kHz
THD
=
10 %, P
O
=
V
O2
/R
L
V
O
=
1 V[rms]
Vol.
=
max.
→
min.
Att
max
=
20 log
[V
O
(Vol.
=
min.) / V
O
(Vol.
=
max.)]
Min
20
27
4.3
−66
Typ
27
30
0.4
4.8
−69
Max
48
33
1.0
Unit
mA
dB
%
W
dB
Tone variable range 1
∆GTC1
f
=
15 kHz, V
O
=
1 V[rms]
∆GTC =
20 log
[V
O
(Tone
=
5.0 V) / V
O
(Tone
=
2.5 V)]
∆GTC2
f
=
15 kHz, V
O
=
1 V[rms]
∆GTC =
20 log
[V
O
(Tone
=
0 V) / V
O
(Tone
=
2.5 V)]
7
9
dB
Tone variable range 2
−11
−9
dB
•
Design reference data
Note) The characteristic values below are theoretical values for designing and not guaranteed.
Parameter
Input dynamic range
Output DC bias
Max. output power 1
Max. output power 2
Symbol
DR
IN
V
ODC
P
Omax1
P
Omax2
Conditions
V
VOL
=
1 V
vary V
IN
until output THD
=
1 %
No input signal
Measure Pin8 DC
THD
=
10 %, V
CC
=
18.4 V
P
O
=
V
O2
/R
L
THD
=
10 %, V
CC
=
26 V
P
O
=
V
O2
/R
L
Min
Typ
4.5
Max
Unit
V[rms]
7.9
8.3
5
9
8.7
V
W
W
3
AN5278
s
Application Circuit Example
ICs for Audio Common Use
In 1
LF 2
Tone 3
Vol. 4
RF 5
NF 6
GND 7
Out 8
V
CC
9
Input
33
µF
330
Ω
10
µF
6.2 kΩ
0.01
µF
18 V
1000
µF
100
µF
10
µF
470
µF
Line out
10 kΩ
Tone
Speaker
8
Ω
5V
5V
Volume
Micom
100
Ω
330
Ω
47
µF
1 Audio det.
s
Usage Notes
1) External heatsink is needed when used. External heatsink should be fixed to the chassis.
2) Fin of the IC can be connected to GND.
3) Please prevent output to V
CC
short, output to GND short and load short to GND.
4) The temperature protection circuit will operate at T
j
around 150
°C.
However, if the temperature decreases, the
protection circuit would automatically be deactivated and resume normal operation.
4
ICs for Audio Common Use
s
Technical Information
1.Characteristic Curve Chart
•
HSIP009-P-0000 Package power dissipation
P
D
T
a
11
10.4
10
9
8
4
P
max
<
1
2
3
T
jmax
−
T
a
R
th
No heat sink
5.5
×
5.0 cm
2
A1 board
(t
=
1 mm)
7.5
×
7.5 cm
2
A1 board
(t
=
1 mm)
Infinity heat sink
AN5278
Power dissipation P
D
(W)
4
6.65
7
6
5
4.14 3
4
2
3.36
3
1
2.5
2
1
0.0
0
25
50
70 75
100
125
150
2.63
2.15
1.6
Ambient temperature T
a
(°C)
•
ASO
Area of Safe Operation
2
t
=
100 ms
1
0.5
I
e
(A)
0.2
0.1
0.05
0.02
0.01
1
2
5
10
20
35 50
100
V
CB
(V)
5
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