BD5446EFV 查看數據表（PDF） - ROHM Semiconductor
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BD5446EFV Datasheet PDF : 32 Pages
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BD5446EFV
Technical Note
●About the protection function
Protection function
Detecting & Releasing condition
Output short
protection
Detecting
condition
Detecting current = 10A (TYP.)
DC voltage protection Detecting PWM output Duty=0% or 100%
in the speaker
condition 43msec(fs=48kHz) above fixed
High temperature
protection
Detecting
condition
Chip temperature to be above 150℃ (TYP.)
Releasing
condition
Chip temperature to be below 120℃ (TYP.)
Under voltage
protection
Detecting
condition
Power supply voltage to be below 8V (TYP.)
Releasing
condition
Power supply voltage to be above 9V (TYP.)
Clock stop protection
Detecting
condition
No change to SYS_CLK more than 1usec (TYP.)
Releasing
condition
Normal input to SYS_CLK
* The ERROR pin is Nch open-drain output.
* Once an IC is latched, the circuit is not released automatically even after an abnormal status is removed.
The following procedures ① or ② is available for recovery.
①After the MUTEX pin is made Low once, the MUTEX pin is returned to High again.
②Turning on the power supply again.
DAC
Output
PWM ERROR
Output Output
Normal
operation
HiZ_Low
(Latch)
HiZ_Low
(Latch)
L
(Latch)
L
(Latch)
HiZ_Low
Normal
operation
Normal
H
operation
HiZ_Low
Normal
operation
Normal
H
operation
Irregular
output
HiZ_Low
H
Normal Normal
operation operation
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17/31
2011.06 - Rev.C
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