A21SP16 datasheet(18/37 Pages) STMICROELECTRONICS

номер детали	A21SP16

подробное описание детали	3 W filter-free class-D audio power amplifier

PDF	37 Pages

Scroll/Zoom	100%

производитель	STMICROELECTRONICS [STMicroelectronics]

домашняя страница	http://www.st.com

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18 / 37 page

Electrical characteristic curves

A21SP16

18/37

DocID026037 Rev 2

Figure 10. Efficiency vs. output power

Figure 11. Efficiency vs. output power

0.0

0.2

0.4

0.6

0.8

1.0

100

150

Vcc=5V

RL=8

Ω + ≥ 15μH

F=1kHz

THD+N

≤1%

Power

Dissipation

Efficiency

Output Power (W)

0.0

0.1

0.2

0.3

0.4

0.5

100

Vcc=3V

RL=8

Ω + ≥ 15μH

F=1kHz

THD+N

≤1%

Power

Dissipation

Efficiency

Output Power (W)

Figure 12. Output power vs. power supply

voltage

Figure 13. Output power vs. power supply

voltage

2.5

3.0

3.5

4.0

4.5

5.0

0.0

0.5

1.0

1.5

2.0

2.5

3.0

THD+N=10%

RL = 4

Ω + ≥ 15μH

F = 1kHz

BW < 30kHz

Tamb = 25

°C

THD+N=2%

Vcc (V)

2.5

3.0

3.5

4.0

4.5

5.0

0.0

0.5

1.0

1.5

2.0

THD+N=10%

RL = 8

Ω + ≥ 15μH

F = 1kHz

BW < 30kHz

Tamb = 25

°C

THD+N=1%

Vcc (V)

Figure 14. PSRR vs. frequency

Figure 15. PSRR vs. frequency

100

1000

10000

-80

-70

-60

-50

-40

-30

-20

-10

Vcc=3V

20k

Vcc=5V

Vripple = 200mVpp

Inputs = Grounded

G = 6dB, Cin = 4.7

μF

RL = 4

Ω + 15μH

Tamb = 25

°C

Frequency (Hz)

100

1000

10000

-80

-70

-60

-50

-40

-30

-20

-10

Vcc=3V

20k

Vcc=5V

Vripple = 200mVpp

Inputs = Grounded

G = 6dB, Cin = 4.7

μF

RL = 4

Ω + 30μH

Tamb = 25

°C

Frequency (Hz)

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