BD5446EFV Rohm, BD5446EFV Datasheet - Page 18

• Manufacturer Part Number: BD5446EFV
• Description: Class-D Speaker Amplifier
• Manufacturer: Rohm

© 2010 ROHM Co., Ltd. All rights reserved.
BD5446EFV
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VCCA (25pin)
VCCP1 (53, 54pin)
VCCP2 (28, 29pin)
OUT_DAC1 (23pin)
OUT_DAC2 (22pin)
OUT1P (50, 51pin)
OUT1N (43, 44pin)
OUT2P (31, 32pin)
OUT2N (38, 39pin)
Speaker output
ERROR (24pin)
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.
Releasing condition – It will release when MUTE pin is set High and the power supply voltage becomes more than 9V.
The speaker output is muted through a soft-mute when detected.
The speaker output is outputted through a soft-start when released.
8V
Soft-mute
43msec(fs=48kHz)
HiZ-Low
3.3V
18/30
9V
Soft-start
43msec(fs=48kHz)
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Technical Note
2010.05 - Rev.B
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