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TFA9881UK/N1,023

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P32
TFA9881 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 3 — 23 April 2013 22 of 32
NXP Semiconductors
TFA9881
3.4 W PDM input class-D audio amplifier
(1) V
ripple
= 0 V (f
ripple
= 0 Hz).
(2) f
ripple
= 217 Hz.
(3) f
ripple
= 1 kHz.
(4) f
ripple
= 6 kHz.
(1) V
ripple
= 0 V (f
ripple
= 0 Hz).
(2) f
ripple
= 217 Hz.
(3) f
ripple
= 1 kHz.
(4) f
ripple
= 6 kHz.
a. V
DDP
=3.6V,R
L
=4, L
L
= 20 H, P
o
= 100 mW
V
ripple
= 200 mV (RMS)
b. V
DDP
=5V,R
L
=4, L
L
= 20 H, P
o
=100 mW
V
ripple
= 200 mV (RMS)
Fig 13. THD+N + power supply intermodulation distortion as a function of frequency
001aam641
f
i
(Hz)
10 10
5
10
4
10
2
10
3
(4)
(3)
(2)
(1)
10
−2
10
−1
1
10
THD+N+IMD
(%)
10
−3
001aam642
f
i
(Hz)
10 10
5
10
4
10
2
10
3
(4)
(3)
(2)
(1)
10
−2
10
−1
1
10
10
−3
THD+N+IMD
(%)
V
DDP
= 3.6 V, R
L
=4 , L
L
= 20 H, P
o
= 500 mW. (1) V
DDP
= 3.6 V.
(2) V
DDP
= 5 V.
R
L
=4, L
L
= 20 H, V
ripple
= 200 mV (RMS).
Fig 14. Normalized gain as a function of frequency Fig 15. PSRR as a function of ripple frequency
001aam643
0
−0.5
0.5
1.0
G
(dB)
−1.0
f
i
(Hz)
10 10
5
10
4
10
2
10
3
001aam644
−70
−50
−90
−30
−10
PSRR
(dB)
−110
f
ripple
(Hz)
10 10
5
10
4
10
2
10
3
(2)
(1)
TFA9881 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 3 — 23 April 2013 23 of 32
NXP Semiconductors
TFA9881
3.4 W PDM input class-D audio amplifier
(1) A-weighted.
(2) 20 kHz brickwall filter.
V
DDP
=5V, R
L
=4, L
L
=20 H, reference signal: 3.4 V (RMS).
Fig 16. S/N ratio as a function of output power
001aam632
50
70
30
90
110
S/N ratio
(dB)
10
P
o
(W)
10
−3
10110
−2
10
−1
(1)
(2)
(1) THD+N = 10 %, R
L
=4 , L
L
= 20 H.
(2) THD+N = 1 %, R
L
=4 , L
L
= 20 H.
(3) THD+N = 10 %, R
L
=8 , L
L
= 44 H.
(4) THD+N = 1 %, R
L
=8 , L
L
= 44 H.
(1) THD+N = 10 %, R
L
=4 , L
L
= 20 H.
(2) THD+N = 1 %, R
L
=4 , L
L
= 20 H.
(3) THD+N = 10 %, R
L
=8 , L
L
= 44 H.
(4) THD+N = 1 %, R
L
=8 , L
L
= 44 H.
a. f
i
= 100 Hz, clip control off b. f
i
= 100 Hz, clip control on
Fig 17. Output power as a function of supply voltage
V
DDP
(V)
26534
001aam649
2
3
1
4
5
P
o
(W)
0
(1)
(2)
(3)
(4)
V
DDP
(V)
26534
001aam650
2
1
3
4
P
o
(W)
0
(1)
(2)
(3)
(4)
TFA9881 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 3 — 23 April 2013 24 of 32
NXP Semiconductors
TFA9881
3.4 W PDM input class-D audio amplifier
(1) V
DDP
=3.6V.
(2) V
DDP
=5V.
(1) V
DDP
=3.6V.
(2) V
DDP
=5V.
a. R
L
=8, L
L
=44 H, f
i
= 1 kHz, DPSA on b. R
L
=4, L
L
=20 H, f
i
= 1 kHz, DPSA on
Fig 18. Power dissipation as a function of output power
001aam647
0.05
0.10
0.15
P
(W)
0
P
o
(W)
10
−3
10110
−2
10
−1
(1)
(2)
001aam645
0.2
0.1
0.3
0.4
P
(W)
0
P
o
(W)
10
−3
10110
−2
10
−1
(1)
(2)
(1) V
DDP
=3.6V.
(2) V
DDP
=5V.
(1) V
DDP
=3.6V.
(2) V
DDP
=5V.
a. R
L
=8, L
L
=44 H, f
i
= 1 kHz, DPSA on b. R
L
=4, L
L
=20 H, f
i
= 1 kHz, DPSA on
Fig 19. Efficiency as a function of output power
P
o
(W)
0 2.01.50.5 1.0
001aam648
40
60
20
80
100
η
(%)
0
(1)
(2)
P
o
(W)
0 3.53.01.0 2.00.5 1.5 2.5
001aam646
40
60
20
80
100
η
(%)
0
(1)
(2)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P32

TFA9881UK/N1,023

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Buy TFA9881UK/N1,023
Manufacturer:
NXP Semiconductors
Description:
IC AMP AUDIO CLASSD 3.4W 9WLCSP
Lifecycle:
New from this manufacturer.
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