Single-/Dual-Supply, Stereo 16W,

Class D Amplifier with Differential Inputs

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9

EFFICIENCY AND POWER

DISSIPATION vs. OUTPUT POWER

MAX9742 toc26

OUTPUT POWER (W)

10

20

30

40

90

80

70

60

50

40

30

20

10

100

0

8

6

4

2

1

9

7

5

3

10

0

050

SYSTEM POWER

DISSIPATION

EFFICIENCY

BTL CONFIGURATION

OUTPUT POWER

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

±14

±12

15

20

25

30

0

10

5

±10

±20

±18

±16

DUAL SUPPLY

10% THD+N

1% THD+N

OUTPUT POWER

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

±14

±12

15

20

25

0

10

5

±10

±20

±18

±16

DUAL SUPPLY

10% THD+N

1% THD+N

OUTPUT POWER

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

30

25

20

25

30

0

15

10

5

20

40

35

SINGLE SUPPLY

10% THD+N

1% THD+N

OUTPUT POWER

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

30

25

20

25

30

0

15

10

5

20

40

35

SINGLE SUPPLY

10% THD+N

1% THD+N

OUTPUT POWER

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

26

22

40

45

0

30

20

10

35

25

15

5

20

30

28

24

BTL CONFIGURATION

10% THD+N

1% THD+N

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

±16

±12

15

20

-20

5

-5

-15

10

0

-10

±10

±20

±18

±14

DUAL SUPPLY

OUTPUT FILTER REMOVED

NO LOAD CONNECTED

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

35

25

17

18

12

15

13

16

14

20

40

30

SINGLE SUPPLY

OUTPUT FILTER REMOVED

INPUTS GROUNDED

NO LOAD CONNECTED

SHUTDOWN SUPPLY CURRENT

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

±14

0

10

-60

-20

-40

-10

-30

-50

±10

±22

±18

±20

±12

±16

DUAL SUPPLY

OUTPUT FILTER REMOVED

INPUTS GROUNDED

NO LOAD CONNECTED

Typical Operating Characteristics (continued)

(24V single-supply mode, ±15V dual-supply mode, both channels driven in phase, THD+N measurement bandwidth = 22Hz to

test circuit component values.)