tfa9879hn NXP Semiconductors, tfa9879hn Datasheet - Page 50

• Manufacturer Part Number: tfa9879hn
• Description: Mono Btl Class-d Audio Amplifier For Portable Applications With Digital Input
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TFA9879_1
Preliminary data sheet
Fig 21. Total harmonic distortion-plus-noise and power supply intermodulation distortion as a function of
Fig 22. Normalized gain as a function of frequency
THD+N
(%)
dB
G
10
10
10
(1) V
(2) f
(3) f
(4) f
(1) high-pass filter off
(2) high-pass filter cut-off frequency: 100 Hz
(3) high-pass filter cut-off frequency: 500 Hz
a. V
−10
−20
−30
−40
10
10
10
−1
−2
−3
1
0
2
10
10
V
V
frequency
ripple
ripple
ripple
ripple
DDP
DDP
ripple
= 217 Hz
= 1 kHz
= 6 kHz
= 3.7 V, R
= 0 V (f
= 3.7 V, R
= 200 mV (RMS)
10
10
2
(1)
(2)
(3)
2
ripple
L
= 8 , P
L
= 0 Hz)
= 8 , P
10
10
3
3
o
(2)
(1)
(4)
= 500 mW
o
= 100 mW,
10
10
4
4
(3)
All information provided in this document is subject to legal disclaimers.
010aaa683
010aaa685
f (Hz)
f (Hz)
10
10
Rev. 01 — 8 April 2010
5
5
Mono BTL class-D audio amplifier with digital input
Fig 23. Power supply rejection ration as a function of
THD+N
PSRR
(%)
(dB)
−100
10
10
10
(1) V
(2) f
(3) f
(4) f
(1) V
(2) V
b. V
−20
−40
−60
−80
10
10
−1
−2
−3
1
0
2
10
10
V
V
ripple frequency
ripple
ripple
ripple
ripple
DDP
DDP
DDP
DDP
ripple
= 217 Hz
= 1 kHz
= 6 kHz
= 5 V, R
= 3.7 V
= 5 V
= 0 V (f
= 5 V, R
= 200 mV (RMS)
10
10
2
2
ripple
L
= 8 ,
L
= 8 , P
= 0 Hz)
10
10
ripple
3
(1)
(2)
3
o
= 200 mV (RMS)
= 100 mW,
10
10
TFA9879
f
© NXP B.V. 2010. All rights reserved.
4
4
(4)
(3)
(2)
(1)
ripple
010aaa684
010aaa686
f (Hz)
(Hz)
10
10
5
5
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