UNISONIC TECHNOLOGIES CO.,
TBA820M
1.2W AUDIO POWER
AMPLIFIER
DESCRIPTION
The UTC
TBA820M
is a monolithic integrated audio
amplifier. It is designed for audio frequency class b amplifier.
LINEAR INTEGRATED CIRCUIT
SOP-8
FEATURES
*Wide operating supply voltage: Vcc=3~14V
*Medium output power
P
OUT
=1.2W at Vcc=9V,R
L
=8Ω, THD=10%
*Low quiescent circuit current: I
Q
=4mA(type)
*Good ripple rejection.
*Minimum number of external parts required.
DIP-8
ORDERING INFORMATION
Order Number
Lead Free
TBA820ML-S08-R
TBA820ML-S08-T
TBA820ML-D08-T
Halogen Free
Package
SOP-8
SOP-8
DIP-8
Packing
Tape Reel
Tube
Tube
TBA820MG-S08-R
TBA820MG-S08-T
TBA820MG-D08-T
www.unisonic.com.tw
Copyright © 2012 Unisonic Technologies Co., Ltd
1
QW-R107-008.D
TBA820M
BLOCK DIAGRAM
Ripple Bootstrap Vcc
8
7
6
LINEAR INTEGRATED CIRCUIT
Output
5
1
CB
2
NF
3
Input
4
GND
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2
QW-R107-008.D
TBA820M
PARAMETER
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
(T
A
=25°C, unless otherwise specified)
SYMBOL
RATINGS
UNIT
Supply Voltage
Vcc
16
V
Output Peak Current
I
O(peak)
1.5
A
Power Dissipation
P
D
1.25
W
Operating Temperature
T
OPR
-20 ~ +85
°C
Storage Temperature
T
STG
-40 ~ +150
°C
Note:1. Absolute maximum ratings are stress ratings only and functional device operation is not implied. The device
could be damaged beyond Absolute maximum ratings.
2. The device is guaranteed to meet performance specifications within 0°C~70°C operating temperature range
and assured by design from –20°C~85°C.
ELECTRICAL CHARACTERISTICS
(T
A
=25°C, V
CC
=9V, F=1KHz, R
G
=600Ω, R
F
=120Ω, R
L
=8Ω, unless otherwise specified)
PARAMETER
Quiescent Current
SYMBOL
I
Q
TEST CONDITIONS
V
IN
=0
Vcc=9V,R
L
=4Ω,THD=10%
Vcc=9V,R
L
=8Ω,THD=10%
Vcc=6V,R
L
=4Ω,THD=10%
Vcc=6V,R
L
=8Ω,THD=10%
Vcc=12V,R
L
=8Ω,THD=10%
P
OUT
=500mW
R
F
=0
R
F
=120Ω
R
G
=10kΩ, BW(-3dB)=50~20kHz
MIN
TYP
4
1.6
1.2
0.75
0.5
2
0.3
75
36
5
0.3
MAX UNIT
12
mA
0.9
0.4
Output Power
P
OUT
W
Total Harmonic Distortion
Open Loop Voltage Gain
Closed Loop Voltage Gain
Input Resistance
Output Noise Voltage
THD
Gvo
Gvc
R
IN
eN
1
39
1
33
%
dB
dB
MΩ
mV
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3
QW-R107-008.D
TBA820M
TEST CIRCUIT
LINEAR INTEGRATED CIRCUIT
V
CC
100
μF/16V
R3
56Ω
0.1
μF
CB
(Bootstrap
INPUT
6
3
7
1
Cap)
100
μ
F/15V
OUTPUT
220
μ
F/15V
R2
1Ω
0.1
μF
R
L
4Ω
UTC TBA820M
R1
10KΩ
5
2
R
F
120Ω
4
8
100
μF/10V
47
μF/10V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4
QW-R107-008.D
TBA820M
TYPICAL CHARACTERISTICS
Fig 1 Quienscent circuit current vs
Supply Voltage
V
IN
=0
8
2.0
1.6
LINEAR INTEGRATED CIRCUIT
Fig 2 Output power vs Supply Voltage
R
L
=8
R
L
=4
R
L
=16
Quiescent Current(mA)
Output Power(W)
1.2
0.8
4
0.4
0
0
4
0
THD=10%
f=1kHz
R
F
=120
0
4
Supply Voltage(V)
8
12
16
20
Supply Voltage(V)
8
12
16
20
Fig 3 Total harmonic Distortion vs Output power
Vcc=9V
R
L
=8
16
R
F
=120
f=1kHz
12
8
Fig 4 Voltage Gain vs Feedback resistance
Vcc=9V
R
L
=8
f=1kHz
Total harmonic Distortion ( %)
Closed loop Voltage Gain(dB)
0.8
1.2
1.6
80
60
40
4
0
0
0.4
20
0
Output Power(W)
0
50
100
150
Feedback Resistance( )
Fig 5 Power Dissipation vs Output power
0.5
Fig 6 Power Dissipation vs Supply Voltage
1.0
Power Dissipation(W)
Power Dissipation(W)
R
L
=8
R
L
=4
0.5
R
L
=16
0.25
Vcc=9V
R
L
=8
f=1kHz
0
0
0.4
0
Output Power(W)
0.8
1.2
1.6
2.0
0
4
Supply Voltage(V)
8
12
16
20
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5
QW-R107-008.D
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