TS4872(2002) 查看數據表（PDF） - STMicroelectronics

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TS4872
(Rev.:2002)

RAIL TO RAIL INPUT/OUTPUT 1W AUDIO POWER AMPLIFIER WITH STANDBY MODE

STMicroelectronics 

TS4872

Fig. 10 : Power Supply Rejection Ratio (PSRR)

vs Power Supply

Fig. 11 : Power Supply Rejection Ratio (PSRR)

vs Feedback Capacitor

-30

Rfeed = 22kΩ

Cb = 1µF & 0.1µF

-40 Input = floating

RL = 8Ω

Tamb = 25°C

-50

Vcc=3.3V

Ripple=100mVrms

-60

Vcc=5V

Ripple=200mVrms

-70

Vcc=2.6V

Ripple=200mVrms

-80

10

100

1000

10000

Frequency (Hz)

100000

-10

Vcc = 5V

-20 Cb = 1µF & 0.1µF

Rfeed = 22kΩ

-30 Rfeed = 22kΩ

Vripple = 200mVms

-40 Input = floating

RL = 8Ω

-50 Tamb = 25°C

Cfeed=0

Cfeed=150pF

Cfeed=330pF

-60

-70

Cfeed=680pF

-80

10

100

1000

10000

Frequency (Hz)

100000

Fig. 12 : Power Supply Rejection Ratio (PSRR)

vs Bypass Capacitor

-10

Cb=1µF

Vcc = 5 & 2.6V

-20

Rfeed = 22k

Cb=10µF Rin = 22k, Cin = 1µF

-30

Rg = 100Ω, RL = 8Ω

Tamb = 25°C

-40

Cb=47µF

-50

-60

-70

Cb=100µF

-80

10

100

1000

10000

Frequency (Hz)

100000

Fig. 13 : Power Supply Rejection Ratio (PSRR)

vs Input Capacitor

-10

Cin=1µF

Cin=330nF

-20

Cin=220nF

-30

Vcc = 5 & 2.6V

Rfeed = 22k, Rin = 22k

Cb = 1µF

Rg = 100Ω, RL = 8Ω

Tamb = 25°C

-40

Cin=100nF

-50

Cin=22nF

-60

10

100

1000

10000

Frequency (Hz)

100000

Fig. 14 : Power Supply Rejection Ratio (PSRR)

vs Feedback Resistor

-10

Vcc = 5V

-20 Cb = 1µF & 0.1µF

Vripple = 200mVrms

-30 Input = floating

RL = 8Ω

-40 Tamb = 25°C

Rfeed=110kΩ

Rfeed=47kΩ

-50

Rfeed=22kΩ

-60

-70

-80

10

Rfeed=10kΩ

100

1000

10000

Frequency (Hz)

100000

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