BD5446EFV(2010) 데이터 시트보기 (PDF) - ROHM Semiconductor

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BD5446EFV
(Rev.:2010)

Class-D Speaker Amplifier for Digital Input

ROHM Semiconductor 

BD5446EFV

Technical Note

●Electrical characteristic curves(VCC=18V,Ta=25℃,RL_SP=8Ω,RL_DA=20kΩ,Gain=20dB,fin=1kHz,fs=48kHz)

Measured by ROHM designed 4layer board.

100

90

80

70

60

50

40

30

20

10

0

0

5

10

15

20

OUTPUT POWER(W /ch)

Fig.13

Efficiency – Output power

40

38

36 Po=1W

34 L=22µH

32 C=0.47µF

30 Cg=0.068µF

28

26

24

22

20

10

100

1k

10k 100k

FREQ UENCY(Hz)

Fig.14

Voltage gain - Frequency

0

Without signal

-20 BW=20～20KHz

-40

-60

-80

-100

-120

-140

10

100 1k 10k 100k

FREQUENCY(Hz)

Fig.15

FFT of output noise voltage

100

BW=20～20KHz

10

1

6KHz

1KHz

0.1

100Hz

0.01

0.001 0.01 0.1 1 10 100

OUTPUT POWER(W)

Fig.16

THD+N - Output power

100

Po=1W

BW=20～20KHz

10

1

0.1

0.01

10 100 1k 10k 100k

FREQUENCY(Hz)

Fig.17

THD+N - Frequency

0

-10 BW=20～20KHz

-20

-30

-40

-50

-60

-70

-80

-90

-100

0.001 0.01 0.1 1

10 100

OUTPUT POWER(W)

Fig.18

Crosstalk - Output power

0

-10

-20

-30

-40

-50

-60

-70

-80

-90

-100

Po=1W

BW=20～20KHz

10 100 1k 10k 100k

FREQUENCY(Hz)

Fig.19

Crosstalk - Frequency

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5/30

2010.05 - Rev.B

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