
15
Maxim Integrated
Dual Automotive, Audio Line Drivers
with I2C Control and Diagnostic
MAX13325/MAX13326
Table 15. Overcurrent Diagnostic
Table 16. Open-Load Diagnostic
Table 14. Excessive Offset Diagnostic
Excessive Offset
When in diagnostic mode with mute enabled, if there
is excessive offset on any output, the MAX13325/
MAX13326 reports the condition through the I2C inter-
face and the FLAG output. See Table 14.
Overcurrent
When in diagnostic mode, if any of the output pairs is
excessively loaded, the MAX13325/MAX13326 issue a
warning and report the condition through the I2C inter-
face and the FLAG output. The faulted channel is not
switched off. See Table 15.
Open Load
When in diagnostic mode and the open-load detec-
tion is initiated, the selected channel is switched off for
1ms during which the diagnosis is taking place. Upon
detecting an open load on any channel, the MAX13325/
MAX13326 report the condition using the I2C interface
and the FLAG output. See Table 16.
Overvoltage
When in diagnostic mode, if the MAX13325/MAX13326
exceed the VDD overvoltage threshold (for example
during a load-dump condition), the device reports the
condition using the I2C interface and the FLAG output.
See Table 17.
FAULT CONDITION
STATUS REPORT
UNMASK
RECOVERY
Excessive Output
Offset on Left
Channel
FLAG is asserted low.
In the LMASK register, set
MOFFSETL bit to 1. See
Table 9.
Cleared on reading the LFAULT
register.
FLAG bit set. See Table 7.
OFFSETL bit is set in the LFAULT
register. See Table 5.
Excessive Output
Offset on Right
Channel
FLAG is asserted low.
In the RMASK register, set
MOFFSETR bit to 1. See
Table 10.
Cleared on reading the RFAULT
register.
FLAG bit set.
OFFSETR bit is set in the RFAULT
register. See Table 6.
FAULT CONDITION
STATUS REPORT
UNMASK
RECOVERY
Overcurrent on Left
Channel
FLAG is asserted low.
In the LMASK register,
set MLIMITL bit to 1. See
Table 9.
Load current falls below the
current-limit threshold.
Cleared on reading the LFAULT
register.
FLAG bit set. See Table 7.
LIMITL bit is set in the LFAULT
register. See Table 5.
Overcurrent on Right
Channel
FLAG is asserted low.
In the RMASK register,
set MLIMITR bit to 1. See
Table 10.
Load current falls below the
current-limit threshold.
Cleared on reading the RFAULT
register.
FLAG bit set. See Table 7.
LIMITR bit is set in the RFAULT
register. See Table 6.
FAULT CONDITION
STATUS REPORT
UNMASK
RECOVERY
Left-Channel Open
Load
FLAG is asserted low.
In the LMASK register,
set MOPENL bit to 1. See
Table 9.
Cleared on reading
the LFAULT register.
FLAG bit set. See Table 7.
OPENL bit is set in the LFAULT
register. See Table 5.
Right-Channel Open
Load
FLAG is asserted low.
In the RMASK register,
set MOPENR bit to 1. See
Table 10.
Cleared on reading
the RFAULT register.
FLAG bit set. See Table 7.
OPENR bit is set in the RFAULT
register. See Table 6.