TS4990EIJT 查看數據表（PDF） - STMicroelectronics

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TS4990EIJT

1.2 W audio power amplifier with active low standby mode

STMicroelectronics 

TS4990

Electrical characteristics

Figure 20. PSRR vs. DC output voltage

0

Vcc = 2.6V

-10

Vripple = 200mVpp

RL = 8Ω

-20

Cb = 1μF

AV = 2

Tamb = 25°C

-30

-40

-50

-60

-70

-2.5 -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 2.5

Differential DC Output Voltage (V)

Figure 21. PSRR vs. DC output voltage

0

Vcc = 2.6V

Vripple = 200mVpp

-10

RL = 8Ω

Cb = 1μF

AV = 10

-20

Tamb = 25°C

-30

-40

-50

-2.5 -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 2.5

Differential DC Output Voltage (V)

Figure 22. Output power vs. power supply

voltage

2.4

2.2 RL = 4Ω

2.0 F = 1kHz

BW < 125kHz

1.8 Tamb = 25°C

1.6

THD+N=10%

1.4

1.2

1.0

0.8

THD+N=1%

0.6

0.4

0.2

0.0

2.5 3.0 3.5 4.0 4.5 5.0 5.5

Vcc (V)

Figure 23. PSRR vs. DC output voltage

0

Vcc = 2.6V

-10

Vripple = 200mVpp

RL = 8Ω

Cb = 1μF

-20

AV = 5

Tamb = 25°C

-30

-40

-50

-60

-2.5 -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 2.5

Differential DC Output Voltage (V)

Figure 24. PSRR at F = 217 Hz vs.

bypass capacitor

-30

-40

-50

Av=2

-60 Vcc:

2.6V

3.3V

-70 5V

-80

0.1

Av=10

Vcc:

2.6V

3.3V

5V

Av=5

Vcc:

2.6V

3.3V

5V

Tamb=25°C

1

Bypass Capacitor Cb ( F)

Figure 25. Output power vs. power supply

voltage

2.0

1.8 RL = 8Ω

F = 1kHz

1.6 BW < 125kHz

1.4 Tamb = 25°C

1.2

THD+N=10%

1.0

0.8

0.6

THD+N=1%

0.4

0.2

0.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

Vcc (V)

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