SA58672 Datasheet, PDF (7/27 Pages) NXP Semiconductors – 3.0 W mono class-D audio amplifier

NXP Semiconductors
10. Typical characterization curves
SA58672
3.0 W mono class-D audio amplifier
100
η_po
80
002aad856
(3)
(2)
(1)
100
η_po
80
(3)
(2)
60
60
40
40
20
20
0
0
0.5 1.0 1.5 2.0 2.5 3.0
P_o (W)
0
0
0.5
1.0
a. R_L = 2 × 15 µH + 4.11 Ω
b. R_L = 2 × 15 µH + 8.03 Ω
(1) V_DD = 5.0 V.
(2) V_DD = 3.6 V.
(3) V_DD = 2.5 V.
Fig 5. Output power efficiency as a function of output power
002aad857
(1)
1.5
2.0
P_o (W)
0.5
P
(W)
0.4
0.3
002aad858
(1)
0.3
P
(W)
0.2
0.2
(2)
0.1
0.1
(2)
0
0
1.0
2.0
3.0
P_o (W)
0
0
0.5
1.0
a. V_DD = 5.0 V
(1) R_L = 2 × 15 µH + 4.11 Ω.
(2) R_L = 2 × 15 µH + 8.03 Ω.
Fig 6. Power dissipation as a function of output power
b. V_DD = 3.6 V
002aad859
(1)
1.5
2.0
P_o (W)
SA58672_4
Product data sheet
Rev. 04 — 8 June 2009
© NXP B.V. 2009. All rights reserved.
7 of 27