UNISONIC TECHNOLOGIES CO.,
TBA820M LINEAR INTEGRATED CIRCUIT
www.unisonic.com.tw 1
Copyright © 2012 Unisonic Technologies Co., Ltd QW-R107-008.D
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
P
OUT=1.2W at Vcc=9V,RL=8Ω, THD=10%
*Low quiescent circuit current: IQ=4mA(type)
*Good ripple rejection.
*Minimum number of external parts required.
DIP-8
SOP-8
ORDERING INFORMATION
Order Number Package Packing
Lead Free Halogen Free
TBA820ML-S08-R TBA820MG-S08-R SOP-8 Tape Reel
TBA820ML-S08-T TBA820MG-S08-T SOP-8 Tube
TBA820ML-D08-T TBA820MG-D08-T DIP-8 Tube
TBA820M LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD 2
www.unisonic.com.tw QW-R107-008.D
BLOCK DIAGRAM
1 2 3 4
8 7 6 5
Ripple Bootstrap Vcc Output
CB NF Input GND
TBA820M LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD 3
www.unisonic.com.tw QW-R107-008.D
ABSOLUTE MAXIMUM RATINGS (TA =25°C, unless otherwise specified)
PARAMETER SYMBOL RATINGS UNIT
Supply Voltage Vcc 16 V
Output Peak Current IO
(p
eak
)
1.5 A
Power Dissipation PD 1.25 W
Operating Temperature TOPR -20 ~ +85 °C
Storage Temperature TSTG -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
(TA=25°C, VCC=9V, F=1KHz, RG=600Ω, RF=120Ω, RL=8Ω, unless otherwise specified)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Quiescent Current IQ V
IN=0 4 12 mA
Output Power POUT
Vcc=9V,RL=4Ω,THD=10% 1.6
W
Vcc=9V,RL=8Ω,THD=10% 0.9 1.2
Vcc=6V,RL=4Ω,THD=10% 0.75
Vcc=6V,RL=8Ω,THD=10% 0.4 0.5
Vcc=12V,RL=8Ω,THD=10% 2
Total Harmonic Distortion THD POUT=500mW 0.3 1 %
Open Loop Voltage Gain Gvo RF=0 75 dB
Closed Loop Voltage Gain Gvc RF=120Ω 33 36 39 dB
Input Resistance RIN 5 MΩ
Output Noise Voltage eN RG=10kΩ, BW(-3dB)=50~20kHz 0.3 1 mV
TBA820M LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD 4
www.unisonic.com.tw QW-R107-008.D
TEST CIRCUIT
UTC TBA820M
3
248
5
1
7
6
VCC
R1
10KΩ
RF
120Ω
R2
1ΩRL
4Ω
R3
56Ω
100 μF/10V
100 μF/16V
CB(Bootstrap
Cap)
47
μF/10V
0.1 μF
INPUT
OUTPUT
0.1 μF
220 μF/15V
100 μF/15V
TBA820M LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD 5
www.unisonic.com.tw QW-R107-008.D
TYPICAL CHARACTERISTICS
Fig 1 Quienscent circuit current vs
Supply Voltage
Fig 2 Output power vs Supply Voltage
Fig 3 Total harmonic Distortion vs Output power
40 8 12 16 20
0
4
8
VIN=0
Supply Voltage(V)
Quiescent Current(mA)
40 8 12 16 20
Supply Voltage(V)
0
0.4
0.8
1.6
2.0
1.2
Output Power(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)
Total harmonic Distortion ( %)
0
4
8
12
16
Vcc=9V
RL=8
RF=120
f=1kHz
0 50 100 150
0
20
40
60
80
Closed loop Voltage Gain(dB)
Fig 4 Voltage Gain vs Feedback resistance
Fig 5 Power Dissipation vs Output power
Vcc=9V
RL=8
f=1kHz
00.40.81.21.6
Output Power(W)
2.0
Power Dissipation(W)
0
0.25
0.5
Power Dissipation(W)
0
0.5
1.0
0481216
Supply Voltage(V)
20
RL=16
RL=8
RL=4
Fig 6 Power Dissipation vs Supply Voltage
Vcc=9V
RL=8
f=1kHz
Feedback Resistance( )
TBA820M LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD 6
www.unisonic.com.tw QW-R107-008.D
TYPICAL CHARACTERISTICS(CONT.)
Total Harminoc distortion(%)
Response(dB)
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.