NXP Semiconductors SA58670A - Manual (Page 15)

SA58670A_2 © NXP B.V. 2008. All rights reserved.
Product data sheet Rev. 02 — 23 October 2008 15 of 24
NXP Semiconductors
SA58670A
2.1 W/channel stereo class-D audio amplifier
a. R
L
= 4
Ω
b. R
L
= 8
Ω
(1) V
DD
= 5.0 V.
(2) V
DD
= 3.6 V.
(3) V
DD
= 2.5 V.
Fig 14. Power dissipation as a function of output power
0
0.6
0.4
0.2
0.8
P
(W)
P
o
(W)
0 2.0 1.6 0.8 1.2 0.4
001aah511
(1)
(3)
(2)
0
0.3
0.2
0.1
0.4
P
(W)
P
o
(W)
0 1.6 1.2 0.4 0.8
001aah512
(1)
(3)
(2)
a. R
L
= 4
Ω
b. R
L
= 8
Ω
(1) V
DD
= 5.0 V.
(2) V
DD
= 3.6 V.
(3) V
DD
= 2.5 V.
Fig 15. Output power efficiency as a function of output power
40
60
20
80
100
η
po
0
P o (W)
0 2.0 1.6 0.8 1.2 0.4
001aah513
(1)
(3)
(2)
40
60
20
80
100
η
po
0
P o (W)
0 1.6 1.2 0.4 0.8
001aah514
(2)
(1)
(3)