ICs for Audio Common Use
AN5270
4.3 W
×
1(8Ω) Power Amplifier with Volume Control and Tone Control
s
Overview
The AN5720 is an integrated circuit designed for 4.3 W(8
Ω)
power amplifier with volume control and tone control.
φ2.65±0.1
8.4±0.25
5.8±0.25
1.5±0.25
6.3
±0.3
7.1
±0.25
Unit : mm
3.75±0.25
M
ain
Di
sc te
on na
tin nc
ue e/
d
0.1±0.05
s
Block Diagram
Pre
amp.
Pin No.
1
2
3
4
5
6
7
8
9
V
CC1
an
Note) Pins 2 and 4 are weaker in protection against positive surge than the other pins.
It is necessary to pay attention during application use.
Ma
int
en
Sound input
Low frequency input
Volume control
Tone control
Ripple filter
Ground
Sound output
V
CC2
ce
s
Pin Descriptions
Pin Name
on
LF 3
tin
ue
4
Vol-ctl.
d
pla inc
Pl
ea
ne lud
se
pla
Tone-ctl. 5
d m es
m
vis
ne ain ain foll
htt it
d d
6
te te ow
p:/ fo
/w llo dis
RF
c nan nan ing
co is o ce c fo
ww wi
.se ng ntin
7
ntin ty e ty ur
mi UR
GND
ue ued pe pe Pro
co L a d t ty
du
n.p bo yp pe
ct
8
e
life
an
Out
ut
d
as lat
cy
on es
cle
9
c
i . t in
V
sta
co fo
ge
.jp rm
.
/en at
/ ion
.
5.6±0.25
•
DC volume control : 0 to 5 V
•
DC tone control : 0 to 5 V
•
9-lead single-in-line plastic package with fin
19.9±0.1
18.3±0.25
φ3.3±0.1
s
Features
HSIP009-P-0000
Volume
control
Tone
control
1
V
CC1
In
2
/D
isc
CC2
1.7
±0.25
1.7±0.25
+0.1
0.45
–0.05
9
8
7
6
5
4
3
2
1
0.5
±0.1
1.2
±0.25
15.0
2.54
22.3±0.3
1
AN5270
s
Absolute Maximum Ratings
Parameter
Supply voltage
Symbol
V
CC1
(V
1-7
)
V
CC2
(V
9-7
)
Circuit voltage
V
2-7
V
3-7
V
4-7
V
5-7
I
CC1
I
CC2
I
8
ICs for Audio Common Use
Ratings
14
26
0 to V
9-7
0 to V
9-7
0 to V
1-7
0 to V
1-7
15
2
Unit
V
M
ain
Di
sc te
on na
tin nc
ue e/
d
Supply current
Circuit current
*3, 4
−1.7
to
+1.7
1.6
−20
to
+70
Power dissipation
*2
P
D
Operating ambient temperature
*1
Storage temperature
*1
T
opr
T
stg
−55
to
+150
therefore please take precaution
not
to short the output pin to either V
CC
or GND.
mA
A
A
PP
W
°C
Note) Do not apply a current or voltage from the external to the terminals that are not described above.
*1 : T
a
=
25
°C,
excluding parameters regarding ambient temperature and storage temperature.
*2 : T
a
=
70
°C,
the IC is mounted on PCB, without external heat sink.
*3 : For circuit currents, '+' denotes current flowing into the IC, and '−' denotes current flowing out of the IC.
*4 : As the output Pin8 does not have over current protection circuit incorporated,
s
Recommended Operating Range
Parameter
Operating supply voltage range
Symbol
V
CC1
2
Ma
int
en
an
ce
/D
isc
on
tin
V
CC2
d
pla inc
Pl
ea
ne lud
se
pla m d m es
ne ain ain foll
htt visit
d d te te ow
p:/ fo
/w llo dis isc nan nan ing
ww wi co on ce c fo
.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
.jp rm
.
/en at
/ ion
.
°C
Range
Unit
V
11 to 13
15 to 24
ue
ICs for Audio Common Use
AN5270
s
Electrical Caracteristics at V
CC1
=
12 V, V
CC2
=
18 V, f
=
1 kHz, T
a
=
25
°C,
RL
=
8
Ω,
Vol.
=
max.,
Tone
=
max.
Parameter
Quiescent current 1
Quiescent current 2
Output DC bias
Symbol
I
TOT1
I
TOT2
V
ODC
G
V
Conditions
No input signal
Measure V
CC1
current
No input signal
Measure V
CC2
current
No input signal
Measure Pin8 DC
Min
7
20
7.2
28
Typ
10
28
8.3
30
0.5
Max
13
48
9.4
32
1.0
Unit
mA
mA
V
dB
%
Max. output power
Pomax
THD
=
10 %, P
O
=
V
O2
/ R
L
Max. output attenuation
Tone variable range
Attmax
∆G
TC
V
O
=
1.0 V
rms
, Vol.
=
max.
→
min.
Attmax
=
20 log [V
O(vol.
=
max.)
/ V
O(vol.
=
min.)
]
f
=
10 kHz, fix V
IN
where
V
O(tone
=
max.)
=
1 V
rms
Tone
=
max.
→
min.
∆G
TC
=
20 log [V
O(tone
=
max.)
/ V
O(tone
=
min.)
]
s
Application Circuit Example
an
100Ω 33µF
Ma
int
en
External
audio in
SIF-IC
Det.
out
24kΩ 3.3µF
Ext
TV
30kΩ
100kΩ
AV 33µF
SW
33µF
1kΩ
33µF
9kΩ
Note) Design considerations for shock noise prevention. :
In the application of the IC, please adopt the above power supply configuration whenever possible.
Where this is not possible, then it is better to ensure that V
CC1
should start up first before the onset of V
CC2
, in order to prevent
power-on shock noise. Similarly, please ensure that V
CC2
declines faster than V
CC1
, in order to prevent power-off shock noise.
d
pla inc
Pl
3
ea
ne lud
LF
se
Vol-ctl. 4
pla m d m es
htt visit
Tone-ctl.
ne ain ain follo
5
d
t
p:/ fo
dis dis ena tena win
/w llo
RF 6
c n n g
ww wi co on ce c fo
ng
.se
GND 7
ntin tin ty e ty ur
mi UR ue ued pe pe Pro
co
8
L a d t ty
Out
du
n.p bo yp pe
ct
e
life
9
an ut
d
V
as lat
cy
on es
cle
ic. t in
sta
co fo
ge
.jp rm
.
/en at
/ ion
.
4.0
4.3
W
−69
20
−66
dB
18
dB
AN78M12
12V
47µF
ce
M
ain
Di
sc te
on na
tin nc
ue e/
d
Voltage gain
V
O
=
1 V
rms
, G
V
=
20 log(V
O
/ V
IN
)
Total harmonic distortion
THD
V
O
=
1 V
rms
, BPF : 400 Hz to 30 kHz
V
CC1
1
on
In 2
isc
tin
ue
AN5270
/D
5.1kΩ
470
µF
CC2
0.039
µF
47µF
2200µF
8Ω
18V
Power
supply
GND
AN78M05
5V
10kΩ
VR
33kΩ
22µF
10kΩ
VR
100µF
3
AN5270
s
Technical Information
•
Characteristic curve chart
P
D
T
a
11
10.4
10
9
4
P
max
<
T
jmax
−
T
a
R
th
2
1.7
1
ICs for Audio Common Use
Area of safe operation
10 ms single pulse,
free air
Power dissipation
P
D
(W)
8
7
6
0.5
6.65
M
ain
Di
sc te
on na
tin nc
ue e/
d
I
C
(A)
5
4.14
4
3.36
3
2.5
2
1
3
2
1
0.1
70
°C
25
°C
2.63
0.05
2.15
1.6
0
0
20
40
60
80 100 120 140 160
Ambient temperature
T
a
(°C)
1 No heat sink
2 5.5
×
5.0 cm
2
Al board
(t
=
1 mm)
3 7.5
×
7.5 cm
2
Al board
(t
=
1 mm)
4 Infinity heat sink
•
Structure of pre-amp. stage
Pre-amp. stage
Tone-control
G
T
2.8 kΩ
isc
33 pF
47 kΩ
on
G
tin
Ci
Point1
G
L1
2.8 kΩ
C2
V
IN
Fig. Simplified structure of AN5270 pre-amp. stage
Explanation of gain notations :
G
T
: Gain of tone-amp. (treble-amp.)
G
F
G
B
: Gain of flat-response amp.
: Gain of bass-amp.
G
L1
: Gain at point 1 with respect to V
IN
.
G
L2
: Gain at point 2 with respect to V
IN
.
G
P
: Gain of power stage.
G
pre
: Gain of pre-amp. stage.
4
d
pla inc
Pl
ea
ne lud
se
p
ma d m es f
LF input 3
la
ne in ain oll
htt visit
d d te te ow
p:/ fo
/w llo dis isc nan nan ing
ww wi co on ce c fo
.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
.jp rm
.
/en at
/ ion
.
0.02
0.01
1
5
10
26
50
100
V
CE
(V)
Power
stage
Volume-control
Output
8
G
F
G
B
G
P
(25 dB)
ue
Point2
G
L2
5.6 kΩ
1 kΩ
/D
Ma
int
en
Input 2
an
ce
C1
R1
ICs for Audio Common Use
s
Technical Information (continued)
•
Structure of pre-amp. stage (continued)
AN5270
G
F
amp., the flat-amp., amplifies the signal equally for all frequencies in the range of 20 Hz to 70 kHz.
G
T
amp., the treble or tone-amp., has an internal LPF connected to its inverting input. The non-inverting input of G
T
amp. is connected to the input signal. Thus, the output of G
T
passes only the upper range of frequencies (cut-off
frequency
=
2.5 kHz).
G
B
amp., the bass-amp., amplifies the lower range of frequencies. Its cut-off frequency is determined by R1· C1.
If LF pin is left open, then G
B
amp. has no effect on the overall frequency response.
G
pre
=
G
L1
· (G
F
+
G
T
)
−
G
B
· G
L2
By vector analysis as shown in fig. Vector diagram of G
pre
,
G
V
[dB]
=
G
pre
+
G
P
G
V
[dB]
=
20 log
√[G
L1
· (G
F
+
G
T
)
−
G
B
· G
L2
· cosθ]
2
+
(G
B
· G
L2
· sinθ)
2
+
G
P
where G
L1
=
0.5
G
F
=
1.3
G
B
=
5.4
G
T
0 for (100 Hz)
=
1.3 for (1 kHz)
2.5 for (10 kHz)
isc
G
V
on
tin
ue
G
P
=
25 dB
Z3 · 0.848
G
B
≈
Z3
+
R1
6600
Z3
=
√1 +
(2πf · C1 · 6600)
2
θ = −tan
−1
(2πf · C1 · 6600)
/D
G1
Ma
int
en
an
ce
−3
dB
G2
*1
100 Hz f
2
1 kHz f
1
Fig. Frequency response of AN5270
Note) *1 : This is the response if LF pin is open (i.e. R1 open).
d
pla inc
Pl
ea
ne lud
se
pla m d m es
ne ain ain foll
htt visit
d d te te ow
p:/ fo
/w llo dis isc nan nan ing
ww wi co on ce c fo
.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
.jp rm
.
/en at
/ ion
.
G
pre
θ
G
L1
· (G
F
+
G
T
)
G
B
· G
L2
Fig. Vector diagram of G
pre
G1 : Gain at 100 Hz
G2 : Gain at 1 kHz
G3 : Gain at 10 kHz
f
1
: High frequency cut-off when Pin3 is open.
f
2
: Low frequency cut-off
Tone
=
max.
Tone
=
min.
G3
−3
dB
10 kHz
f
M
ain
Di
sc te
on na
tin nc
ue e/
d
•
Gain calculation
General formula for gain of pre-amp. is (when vol.
=
max., tone
=
max.) :
5
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
