bd5445efv ROHM Co. Ltd., bd5445efv Datasheet - Page 22

• Manufacturer Part Number: bd5445efv
• Description: Analog Input / Single End Output Class-d Speaker Amplifier
• Manufacturer: ROHM Co. Ltd.

4 ）Under voltage protection
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BD5445EFV
VCCA (1pin)
VCCP1 (27,28pin)
VCCP2 (15,16pin)
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OUT1 (25, 26pin)
OUT2 (17, 18pin)
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 PDX pin is set High and the power supply voltage becomes lower than 8V.
Releasing condition – It will release when PDX pin is set High and the power supply voltage becomes more than 9V.
Speaker
output
The speaker output is muted when detected.
The speaker output is outputted through a soft-start when released.
8V
Out put : HiZ-Low
22/31
9V
800msec(typ.)
Soft-start
55msec(typ.)
Technical Note
2010.05 - Rev.B
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