BD5446EFV Rohm, BD5446EFV Datasheet - Page 19

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

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BD5446EFV
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3) Clock stop protection
OUT_DAC1 (23pin)
This IC has the clock stop protection circuit that make the speaker output mute when the SYS_CLK signal of the digital
audio input stops.
OUT1P (50, 51pin)
OUT1N (43, 44pin)
OUT2P (31, 32pin)
OUT2N (38, 39pin)
OUT_DAC2 (22pin)
SYS_CLK (7pin)
Speaker output
Detecting condition - It will detect when MUTE pin is set High and the SYS_CLK signal stops for about 1usec or more.
Releasing condition - It will release when MUTE pin is set High and the SYS_CLK signal returns to the normal clock
ERROR (24pin)
The speaker output is muted through a soft-mute when detected.
Clock stop
operation. The speaker output is outputted through a soft-start when released.
Protection start with
about 1μsec clock stop.
19/30
Unstable
HiZ-Low
3.3V
Clock recover
Soft-start
43msec(fs=48kHz)
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Technical Note
2010.05 - Rev.B
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