LM49270 datasheet(9/28 Pages) TI1

部件名	LM49270

功能描述	Filterless 2.2W Stereo Class D Audio Subsystem with OCL Headphone Amplifier, 3D Enhancement, and Headphone Sense

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制造商	TI1 [Texas Instruments]

网页	http://www.ti.com

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9 / 28 page

100

10

0.1

0.01

0.01m

0.1m

1m

10m

1

100m

OUTPUT POWER/CHANNEL (W)

VDD = 5V

VDD = 3.3V

100

10

0.1

0.01

0.01m

0.1m

1m

10m

1

100m

OUTPUT POWER/CHANNEL (W)

VDD = 5V

VDD = 3.3V

100

10

0.1

0.01

0.01m

0.1m

1m

10m

1

100m

OUTPUT POWER/CHANNEL (W)

VDD = 5V

VDD = 3.3V

1

100

10

0.1

0.01

0.01m

0.1m

1m

10m

1

100m

OUTPUT POWER/CHANNEL (W)

VDD = 5V

VDD = 3.3V

100

0.01

0.1

1

10

0.1

1

0.001

0.01

OUTPUT POWER/CHANNEL (W)

VDD = 5V

VDD = 3.3V

0.001

100

0.01

0.1

1

10

1

OUTPUT POWER/CHANNEL (W)

0.001

0.01

0.1

VDD = 5V

VDD = 3.3V

LM49270

www.ti.com

SNAS384B – DECEMBER 2006 – REVISED MARCH 2007

Typical Performance Characteristics

THD+N

vs

Output Power

Speaker Mode

AV = 6dB, RL = 4Ω, f = 1kHz

AV = 6dB, RL = 8Ω, f = 1kHz

Figure 3.

Figure 4.

THD+N

vs

Output Power

OCL Headphone Mode

AV = 0dB, RL = 16Ω, f = 1kHz

AV = 0dB, RL = 32Ω, f = 1kHz

Figure 5.

Figure 6.

THD+N

vs

Output Power

CC Headphone Mode

AV = 0dB, RL = 16Ω, f = 1kHz

AV = 0dB, RL = 32Ω, f = 1kHz

Figure 7.

Figure 8.

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