TS4900(2002) Просмотр технического описания (PDF) - STMicroelectronics

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Компоненты Описание

производитель

TS4900
(Rev.:2002)

300mW at 3.3V SUPPLY AUDIO POWER AMPLIFIER WITH STANDBY MODE ACTIVE HIGH

STMicroelectronics 

Fig. 21 : Output Power vs Load Resistance

1.0

THD+N=1%

Gv = 2 & 10

0.8

Cb = 1µF

F = 1kHz

Vcc=5V

BW < 125kHz

0.6

Tamb = 25°C

Vcc=4.5V

0.4

Vcc=4V

0.2

Vcc=3.5V

Vcc=3V

Vcc=2.5V

0.0

8

16

24

32

Load Resistance ( )

Fig. 23 : Clipping Voltage vs Supply Voltage

1.0

Tamb = 25°C

0.9

0.8

4Ω High Side

0.7

4Ω Low Side

0.6

0.5

0.4

8Ω Low Side

8Ω High Side

0.3

0.2

2.5

3.0

3.5

4.0

4.5

5.0

Supply Voltage (V)

Fig. 25 : Noise Floor

100

Vcc = 2.5V to 5V

Rin = Rfeed = 22kΩ

80 Cb = Cin = 1µF

Input Grounded

BW < 22kHz

60 Tamb = 25°C

40

V +V

OUT1

OUT2

20

Standby = ON

0

20

100

1000

Frequency (Hz)

10000

TS4900

Fig. 22 : Output Power vs Load Resistance

1.2

THD+N=10%

Gv = 2 & 10

1.0

Vcc=5V

Cb = 1µF

F = 1kHz

BW < 125kHz

0.8

Tamb = 25°C

Vcc=4.5V

0.6

Vcc=4V

0.4

0.2

Vcc=3.5V

Vcc=3V

0.0

Vcc=2.5V

8

16

24

32

Load Resistance ( )

Fig. 24 : Frequency response vs Cin & Cfeed

10

5

0

-5

-10

-15

-20

-25

10

Cfeed = 330pF

Cfeed = 680pF

Cin = 470nF Cfeed = 2.2nF

Cin = 22nF

Cin = 82nF

Rin = Rfeed = 22kΩ

Tamb = 25°C

100

1000

Frequency (Hz)

10000

9/19

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