Production Data

WM9001

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PD, March 2010, Rev 4.1

13

EFFICIENCY

Typical Efficiency versus output power curves are provided below for both class AB and class D

modes.

CLASS AB

CLASS D

WM9001 Class AB Efficiency

AVDD=3.3V, SPKVDD=5.0V, BSEL[2:0]=011 (x1.52)

0

10

20

30

40

50

60

70

80

90

100

0

200

400

600

800

1000

1200

1400

Output Power (mW)

Differential Mode

Single-Ended Mode

WM9001 Class D Efficiency

AVDD=3.3V, SPKVDD=5.0V, BSEL[2:0]=011 (x1.52)

0

10

20

30

40

50

60

70

80

90

100

0

200

400

600

800

1000

1200

1400

Output Power (mW)

Differential Mode

Single-Ended Mode