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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 POUT=1.2W at Vcc=9V,RL=8, THD=10% *Low quiescent circuit current: IQ=4mA(type) *Good ripple rejection. *Minimum number of external parts required.
DIP-8
*Pb-free plating product number: TBA820ML
ORDERING INFORMATION Order Number Normal Lead Free Plating TBA820M-S08-R TBA820ML-S08-R TBA820M-S08-T TBA820ML-S08-T TBA820M-D08-T TBA820ML-D08-T Package SOP-8 SOP-8 DIP-8 Packing Tape Reel Tube Tube
BLOCK DIAGRAM
Ripple Bootstrap Vcc Output
8
7
6
5
1
CB
2
NF
3
Input
4
GND
www.unisonic.com.tw Copyright (c) 2005 Unisonic Technologies Co.,
1
QW-R107-008.C
TBA820M
ABSOLUTE MAXIMUM RATINGS (Ta =25C)
LINEAR INTEGRATED CIRCUIT
PARAMETER SYMBOL RATINGS UNIT Supply Voltage Vcc 16 V Output Peak Current IO(peak) 1.5 A Power Dissipation PD 1.25 W Operating Temperature TOPR 0 ~ +70 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 0~70 operating temperature range and assured by design from -20~85.
ELECTRICAL CHARACTERISTICS
(Ta=25C, Vcc=9V, F=1KHZ, RG=600, RF=120, RL=8, unless otherwise specified. PARAMETER Quiescent Current SYMBOL IQ TEST CONDITIONS VIN=0 Vcc=9V,RL=4,THD=10% Vcc=9V,RL=8,THD=10% Vcc=6V,RL=4,THD=10% Vcc=6V,RL=8,THD=10% Vcc=12V,RL=8,THD=10% POUT=500mW RF=0 RF=120 RG=10k, BW(-3dB)=50~20kHz MIN TYP 4 1.6 1.2 0.75 0.5 2 0.3 75 36 5 0.3 MAX 12 UNIT mA
0.9 0.4
Output Power
POUT
W
Total Harmonic Distortion Open Loop Voltage Gain Closed Loop Voltage Gain Input Resistance Output Noise Voltage
THD Gvo Gvc RIN eN
1 39 1
33
% dB dB M mV
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2
QW-R107-008.C
TBA820M
TEST CIRCUIT
LINEAR INTEGRATED CIRCUIT
VCC 100 F/16V R3 56 0.1 F
INPUT
6 3 7 1
CB(Bootstrap
Cap)
100 F/15V OUTPUT 220 F/15V
R2 1 0.1 F RL 4
UTC TBA820M
R1 10K
5
2
RF 120
4
8
100 F/10V
47 F/10V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3
QW-R107-008.C
TBA820M
TYPICAL CHARACTERISTICS
Fig 1 Quienscent circuit current vs Supply Voltage VIN=0
8 2.0 1.6
LINEAR INTEGRATED CIRCUIT
Fig 2 Output power vs Supply Voltage
RL=8 RL=4 RL=16
Quiescent Current(mA)
Output Power(W)
1.2 0.8
4
0.4 0 0 4 8 12 16 20 0 0 4 8 12
THD=10% f=1kHz RF=120
16 20
Supply Voltage(V)
Supply Voltage(V)
Fig 3 Total harmonic Distortion vs Output power Vcc=9V RL=8 16 RF=120 f=1kHz
12 8
Fig 4 Voltage Gain vs Feedback resistance Vcc=9V RL=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 0 50 100 150
Output Power(W)
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)
RL=8 RL=4
0.5
RL=16
0.25
Vcc=9V RL=8 f=1kHz
0 0 0.4 0.8 1.2 1.6 2.0
0 0 4 8 12 16 20
Output Power(W)
Supply Voltage(V)
4
QW-R107-008.C
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
TBA820M
TYPICAL CHARACTERISTICS(CONT.)
Fig 7 Frequency response
RF=120 3
LINEAR INTEGRATED CIRCUIT
Fig 8 Total Harmonic distortion vs frequency
5
Total Harminoc distortion(%)
Vcc=9V RL=8 4 RF=120
3 2
Response(dB)
1 0 -1 CB=660pF -3 -5
10 2 10 3 10
CB=220pF
PoUT=50mW
PoUT=500mW
1 0
10 10
4 10
5 10
2
10
3
4 10
5 10
Frequency(Hz)
Frequency(Hz)
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.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5
QW-R107-008.C

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