MAX13325_12 Datasheet, PDF (15/21 Pages) Maxim Integrated Products – Dual Automotive, Audio Line Drivers with I2C Control and Diagnostic

MAX13325/MAX13326
Dual Automotive, Audio Line Drivers
with I²C Control and 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 V_DD 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.
Table 14. Excessive Offset Diagnostic
FAULT CONDITION
Excessive Output
Offset on Left
Channel
Excessive Output
Offset on Right
Channel
STATUS REPORT
FLAG is asserted low.
FLAG bit set. See Table 7.
OFFSETL bit is set in the LFAULT
register. See Table 5.
FLAG is asserted low.
FLAG bit set.
OFFSETR bit is set in the RFAULT
register. See Table 6.
UNMASK
In the LMASK register, set
MOFFSETL bit to 1. See
Table 9.
In the RMASK register, set
MOFFSETR bit to 1. See
Table 10.
RECOVERY
Cleared on reading the LFAULT
register.
Cleared on reading the RFAULT
register.
Table 15. Overcurrent Diagnostic
FAULT CONDITION
Overcurrent on Left
Channel
STATUS REPORT
FLAG is asserted low.
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.
FLAG bit set. See Table 7.
LIMITR bit is set in the RFAULT
register. See Table 6.
Table 16. Open-Load Diagnostic
FAULT CONDITION
Left-Channel Open
Load
Right-Channel Open
Load
STATUS REPORT
FLAG is asserted low.
FLAG bit set. See Table 7.
OPENL bit is set in the LFAULT
register. See Table 5.
FLAG is asserted low.
FLAG bit set. See Table 7.
OPENR bit is set in the RFAULT
register. See Table 6.
Maxim Integrated
UNMASK
In the LMASK register,
set MLIMITL bit to 1. See
Table 9.
In the RMASK register,
set MLIMITR bit to 1. See
Table 10.
UNMASK
In the LMASK register,
set MOPENL bit to 1. See
Table 9.
In the RMASK register,
set MOPENR bit to 1. See
Table 10.
RECOVERY
Load current falls below the
current-limit threshold.
Cleared on reading the LFAULT
register.
Load current falls below the
current-limit threshold.
Cleared on reading the RFAULT
register.
RECOVERY
Cleared on reading
the LFAULT register.
Cleared on reading
the RFAULT register.
  15