TFA9881_1104 PHILIPS [NXP Semiconductors], TFA9881_1104 Datasheet - Page 24

• Manufacturer Part Number: TFA9881_1104
• Description: 3.4 W PDM input class-D audio amplifier
• Manufacturer: PHILIPS [NXP Semiconductors]

NXP Semiconductors
TFA9881
Product data sheet
Fig 18. Power dissipation as a function of output power
Fig 19. Efficiency as a function of output power
(W)
(%)
P
(1) V
(2) V
η
(1) V
(2) V
0.15
0.10
0.05
a. R
a. R
100
80
60
40
20
0
0
10
0
−3
DDP
DDP
DDP
DDP
L
L
= 8 Ω, L
= 8 Ω, L
= 3.6 V.
= 5 V.
= 3.6 V.
= 5 V.
10
0.5
−2
L
L
(1)
= 44 μH, f
= 44 μH, f
10
1.0
−1
i
i
= 1 kHz, DPSA on
= 1 kHz, DPSA on
1.5
1
(1)
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P
P
o
o
(W)
(W)
(2)
2.0
10
Rev. 2 — 1 April 2011
(W)
(%)
P
(1) V
(2) V
(1) V
(2) V
η
b. R
b. R
100
0.4
0.3
0.2
0.1
80
60
40
20
0
0
10
0
−3
DDP
DDP
DDP
DDP
L
L
= 4 Ω, L
= 4 Ω, L
3.4 W PDM input class-D audio amplifier
0.5
= 3.6 V.
= 5 V.
= 3.6 V.
= 5 V.
10
−2
1.0
L
L
= 20 μH, f
= 20 μH, f
1.5
10
(1)
−1
2.0
i
i
= 1 kHz, DPSA on
= 1 kHz, DPSA on
2.5
1
TFA9881
© NXP B.V. 2011. All rights reserved.
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P
3.0
(1)
o
P
(W)
(2)
(2)
o
(W)
3.5
10
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