Tda8932b, Nxp semiconductors, Class-d audio amplifier – NXP Semiconductors TDA8932B User Manual

Page 34

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TDA8932B_4

© NXP B.V. 2008. All rights reserved.

Product data sheet

Rev. 04 — 18 December 2008

34 of 48

NXP Semiconductors

TDA8932B

Class-D audio amplifier

V

i

= 100 mV (RMS); R

i

= 0

(1) V

P

= 12 V; R

L

= 4

(2) V

P

= 22 V; R

L

= 8

V

ripple

= 500 mV (RMS) referenced to ground; R

i

= 0

(shorted input)

(1) V

P

= 22 V; R

L

= 8

(2) V

P

= 12 V; R

L

= 4

Fig 28. Gain as a function of frequency

Fig 29. Supply voltage ripple rejection as a function of

frequency

001aae116

20

30

40

G

v

(dB)

10

f

i

(Hz)

10

10

5

10

4

10

2

10

3

(1)

(2)

001aae117

60

40

80

20

0

SVRR

(dB)

100

f

i

(Hz)

10

10

5

10

4

10

2

10

3

(1)

(2)

R

i

= 0

; 20 kHz brick-wall filter AES17

(1) R

L

= 4

; V

P

= 12 V

(2) R

L

= 8

; V

P

= 22 V

f

i

= 1 kHz (short time P

O

); dashed line will require heat

sink for continuous time output power

(1) R

L

= 4

; THD+N = 10 %

(2) R

L

= 4

; THD+N = 0.5 %

(3) R

L

= 8

; THD+N = 10 %

(4) R

L

= 8

; THD+N = 0.5 %

Fig 30. Signal-to-noise ratio as a function of output

power

Fig 31. Output power as a function of supply voltage

001aae118

P

o

(W)

10

2

10

2

10

10

1

1

40

80

120

S/N

(dB)

0

(2)

(1)

001aaf893

V

P

(V)

10

34

26

18

14

30

22

40

50

30

20

10

60

70

P

o

(W)

0

(2)

(1)

(3)

(4)

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