TFA9843AJ datasheet(9/19 Pages) NXP

Part #	TFA9843AJ

Description	20 W stereo power amplifier with volume control

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Manufacturer	NXP [NXP Semiconductors]

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TFA9843AJ_1

Preliminary data sheet

Rev. 01 — 28 April 2006

9 of 19

Philips Semiconductors

TFA9843AJ

20 W stereo power ampliﬁer with volume control

THD = 10 %; RL = 4 Ω; f = 1 kHz

VCC = 18 V; RL = 4 Ω

Fig 7.

Output power as a function of supply voltage

Fig 8.

Total power dissipation as a function of channel

output power per channel (worst case, both

channels driven)

828

50

0

10

20

30

40

12

Po

(W)

16

20

24

VCC (V)

mce491

020

Po (W)

10

0

2

4

6

8

4

Ptot

(W)

812

16

mce507

VCC = 18 V; RL = 4 Ω

VCC = 18 V; ZS = 0 Ω; Vripple = 300 mV (RMS); a

bandpass ﬁlter of 20 Hz to 22 kHz has been applied;

inputs short-circuited.

Fig 9.

Channel separation as a function of frequency

(no bandpass ﬁlter applied)

Fig 10. Supply voltage ripple rejection as a function of

frequency

−100

0

−80

−60

−40

−20

mce495

10

αcs

(dB)

f (Hz)

102

103

104

105

−80

−60

−40

−20

0

mce497

10

SVRR

(dB)

f (Hz)

102

103

104

105

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