UTC TBA820M LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R107-008,B
1.2W AUDIO POWER AMPLIFIER
DESCRIPTION
The UTC TBA820M is a monolithic integrated audio
amplifier. It is designed for audio frequency class b amplifier.
FEATURES
*Wide operating supply voltage: Vcc=3~14V
*Medium output power
Po=1.2W at Vcc=9V,R
L
=8 ohm, Thd=10%
*Low quiescent circuit current: I
CCQ
=4mA(type)
*Good ripple rejection.
*Minimum number of external parts required.
DIP-8
SOP-8
BLOCK DIAGRAM
1
2
3
4
8
7
6
5
Ripple
Bootstrap Vcc
Output
CB
NF
Input
GND
ABSOLUTE MAXIMUM RATINGS
(Ta=25
C)
PARAMETER SYMBOL
VALUE UNIT
Supply Voltage
Vcc
16
V
Output Peak Current
Ipeak
1.5
A
Power Dissapation
P
D
1.25
W
Operating Temperature
Topr
-20 ~ +70
C
Storage Temperature
Tstg
-40 ~ +150
C
UTC TBA820M LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R107-008,B
ELECTRICAL CHARACTERISTICS
(Ta=25
C,Vcc=9V, f=1kHz, RG=600, RF=120, RL=8, unless
otherwise specified)
PARAMETER SYMBOL
TEST
CONDITIONS
MIN
TYP
MAX
UNIT
Quiescent Circuit Current
I
CCQ
VI=0
4
12
mA
Vcc=9V,R
L
=4
,THD=10%
1.6
Vcc=9V,R
L
=8
,THD=10%
0.9 1.2
Output Power
Po
Vcc=6V,R
L
=4
,THD=10%
0.75 W
Vcc=6V,R
L
=8
,THD=10%
0.4 0.5
Vcc=12V,R
L
=8
,THD=10%
2
Total Harmonic Distortion
THD
Po=500mW
0.3
1
%
Open Loop Voltage Gain
Gvo
R
F
=0
75
dB
Closed Loop Voltage Gain
Gvc
R
F
=120
33 36 39 dB
Input Resistance
RI
5
M
Output Noise Voltage
V
NO
RG=10k
BW(-3dB)=50~20kHz
0.3 1 mV
TEST CIRCUIT
UTC TBA820M
3
2
4
8
5
1
7
6
VCC
R1
10K
RF
120
R2
1
RL
4
R3
56
100
F/10V
100
F/16V
CB
(Bootstrap
Cap)
47
F/
10V
0.1
F
INPUT
OUTPUT
0.1
F
220
F/15V
100
F/15V
UTC TBA820M LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R107-008,B
TYPICAL PERFORMANCE CHARACTERISTICS
Fig 1 Quienscent circuit current
vs Supply Voltage
Fig 2 Output power vs Supply
Voltager
Fig 3 Total harmonic Distortion
vs Output power
4
0
8
12
16
20
0
4
8
VI=0
Supply Voltage(V)
Q
u
ies
c
ent
Cur
r
ent
(
m
A
)
4
0
8
12
16
20
Supply Voltage(V)
0
0.4
0.8
1.6
2.0
1.2
O
u
t
put
P
o
wer
(
W
)
THD=10%
f=1kHz
RF=120
RL=4
RL=8
RL=16
0
0.4
0.8
1.2
1.6
Output Power(W)
T
o
t
a
l har
m
onic
Dis
t
or
t
i
on (
%)
0
4
8
12
16
Vcc=9V
RL=8
RF=120
f=1kHz
0
50
100
150
0
20
40
60
80
Clos
ed loop V
o
lt
age G
a
in(
d
B
)
Fig 4 Voltage Gain vs Feedback
resistance
Fig 5 Power Dissipation vs
Output power
Vcc=9V
RL=8
f=1kHz
0
0.4
0.8
1.2
1.6
Output Power(W)
2.0
P
o
wer
Dis
s
i
pat
ion(
W
)
0
0.25
0.5
P
o
wer
Dis
s
i
pat
ion(
W
)
0
0.5
1.0
0
4
8
12
16
Supply Voltage(V)
20
RL=16
RL=8
RL=4
Fig 6 Power Dissipation vs
Supply Voltage
Vcc=9V
RL=8
f=1kHz
Fig 7 Frequency response
Fig 8 Total Harmonic distortion
vs frequency
10
10
3
10
2
10
4
10
5
10
10
3
10
2
10
4
10
5
0
0
2
3
4
5
Frequency(Hz)
T
o
t
a
l Har
m
inoc
dis
t
or
t
i
on(
%)
Frequency(Hz)
Res
pons
e(
dB
)
-5
-3
-1
1
3
CB=660pF
CB=220pF
RF=120
1
Po=50mW
Po=500mW
Vcc=9V
RL=8
RF=120
Feedback Resistance(
)
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