BD5446EFV 查看數據表（PDF） - ROHM Semiconductor

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产品描述 (功能)

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BD5446EFV

Class-D Speaker Amplifier or Digital Input

ROHM Semiconductor 

BD5446EFV

Technical Note

2) Under voltage protection

This IC has the under voltage protection circuit that make speaker output mute once detecting extreme drop of the power

supply voltage.

Detecting condition – It will detect when MUTE pin is set High and the power supply voltage becomes lower than 8V.

The speaker output is muted through a soft-mute when detected.

Releasing condition – It will release when MUTE pin is set High and the power supply voltage becomes more than 9V.

The speaker output is outputted through a soft-start when released.

VCCA (25pin)

VCCP1 (53, 54pin)

VCCP2 (28, 29pin)

OUT1P (50, 51pin)

OUT1N (43, 44pin)

OUT2P (31, 32pin)

OUT2N (38, 39pin)

Speaker output

8V

HiZ-Low

Soft-mute

43msec(fs=48kHz)

9V

t

t

Soft-start

43msec(fs=48kHz)

t

ERROR (24pin)

3.3V

t

OUT_DAC1 (23pin)

OUT_DAC2 (22pin)

t

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© 2011 ROHM Co., Ltd. All rights reserved.

19/31

2011.06 - Rev.C

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