Datasheet TBA820M Datasheet (Contek)

TBA820M LINEAR INTEGRATED CIRCUIT

1.2W AUDIO POWER AMPLIFIER

DESCRIPTION

The Contek 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
*Low quiesent circuit current:I
*Good ripple rejection.
*Minimum number of external parts required.

BLOCK DIAGRAM

L=8 ohm ,Thd=10%

CCQ=4mA(type)

DIP-8

Ripple Bootstrap Vcc Output

8 7 6 5

Contek
TBA820M

1 2 3 4

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 PD 1.25 W
Operating Temperature Topr -20 ~ +70 C
Storage Temperature Tstg -40 ~ +150 C

Contek Microelectronics Co.,Ltd.

CONTEK

http://www.contek-ic.com E-mail:[e-mail]

1

TBA820M LINEAR INTEGRATED CIRCUIT

ELECTRICAL CHARACTERISTICS(Ta=25 C,Vcc=9V,f=1kHz,RG=600W,RF=120W,RL=8W,unless

otherwise specified)

Quiescent Circuit Current ICCQ VI=0 4 12 mA

Output Power Po

Total Harmonic Distortion THD Po=500mW 0.3 1 %
Open Loop Voltage Gain Gvo RF=0 75 dB
Closed Loop Voltage Gain Gvc
Input Resistance RI 5
Output Noise Voltage VNO

TEST CIRCUIT

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT

Vcc=9V,R L=4W,THD=10%
Vcc=9V,R L=8W,THD=10%
Vcc=6V,R
Vcc=6V,R L=8W,THD=10%

Vcc=12V,R L=8W,THD=10%

L=4W,THD=10%

F=120W

R

RG=10kW

BW(-3dB)=50~20kHz

1.6

0.9 1.2

0.75 W

0.4 0.5
2

33 36 39 dB

MW

0.3 1 mW

VCC

INPUT

10K W

100mF/16V

R1

6

3

Contek TBA820M

2

RF

120

100 mF/10V

7

4

W

56

R3

W

1

8

CB

5

47 mF/

10V

(Bootstrap

Cap)

0.1 m F

220 mF/15V

R2

W

1

0.1mF

100mF/15V

OUTPUT

RL
4

W

CONTEK

Contek Microelectronics Co.,Ltd.

http://www.contek-ic.com E-mail:[e-mail]

2

TBA820M LINEAR INTEGRATED CIRCUIT

TYPICAL PERFORMANCE CHARACTERISTICS

Fig 1 Quienscent circuit current

vs Supply Voltage

8

VI=0

4

Quiescent Current(mA)

0

40 8 12 16 20

Supply Voltage(V)

Fig 4 Voltage Gain vs Feedback

80

60

40

20

resistance

Vcc=9V

RL=8W
f=1kHz

Closed loop Voltage Gain(dB)

0

0 50 100 150

Feedback Resistance(W)

Fig 7 Frequency response

RF=120W

3

1

0

-1

Response(dB)

-3

-5

10

CB=660pF

2

10

Frequency(Hz)

3

10

CB=220pF

10410

5

Fig 2 Output power vs Supply

2.0

1.6

1.2

0.8

Output Power(W)

0.4

0

0.5

0.25

Voltager

RL=8W

W

RL=4

THD=10%

RF=120W

40 8 12 16 20

Supply Voltage(V)

Fig 5 Power Dissipation vs

Output power

Vcc=9V

RL=8W
f=1kHz

Power Dissipation(W)

0

0 0.4 0.8 1.2 1.6

Output Power(W)

Fig 8 Total Harmonic distortion

10

Vcc=9V

RL=8W

RF=120W

Po=50mW

10

vs frequency

3

2

10

Frequency(Hz)

5

4

3

2

1

Total Harminoc distortion(%)

0

f=1kHz

Po=500mW

W

RL=16

10410

2.0

5

Fig 3 Total harmonic Distortion

vs Output power

Vcc=9V

16

RL=8W

RF=120W

f=1kHz

12

8

4

Total harmonic Distortion ( %)

0

0 0.4 0.8 1.2 1.6

Output Power(W)

Fig 6 Power Dissipation vs

1.0

Supply Voltage

RL=8W

RL=4W

0.5

Power Dissipation(W)

0

0481216

Supply Voltage(V)

RL=16W

20

CONTEK

Contek Microelectronics Co.,Ltd.

http://www.contek-ic.com E-mail:[e-mail]

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