MAX13325 Datasheet, PDF (14/21 Pages) Maxim Integrated Products – Dual Automotive, Audio Line Drivers with I2C Control and Diagnostic

Dual Automotive, Audio Line Drivers
with I²C Control and Diagnostic
Output Short to GND
When in diagnostic mode, the MAX13325/MAX13326
detect if any of the differential outputs is shorted to
ground. Upon detection of the short to ground, the
faulted channel is switched off and its output goes into a
high-impedance state. The fault is reported using the I²C
interface and the FLAG output. See Table 12.
Overtemperature
When in diagnostic mode, if the MAX13325/MAX13326
exceed the overtemperature warning or temperature shut-
down thresholds the device reports the condition using
the I²C interface and the FLAG output. See Table 13.
Table 12. Output Short to GND Diagnostic
FAULT CONDITION
STATUS REPORT
FLAG is asserted low.
FLAG bit set. See Table 7.
Left-Channel Output
Short to GND
SGNDL bit is set in the LFAULT
register. See Table 5.
Left channel switches off and output
goes to high-impedance state.
Right-Channel Output
Short to GND
FLAG is asserted low.
FLAG bit set. See Table 7.
SGNDR bit is set in the RFAULT
register. See Table 6.
Right channel switches off and
output goes to high-impedance
state.
UNMASK
In LMASK register, set
MSGNDL bit to 1. See
Table 9.
Cannot be masked.
In RMASK register, set
MSGNDR bit to 1. See
Table 10.
Cannot be masked.
RECOVERY
Cleared on reading the LFAULT
register. See Table 5.
Note: 500ms autoretry in stand-
alone mode.
Output is enabled by setting the
RETRYL bit to 1 in the Command
Byte register. See Table 3.
Cleared on reading the RFAULT
register. See Table 6.
Note: 500ms autoretry in stand-
alone mode.
Output is enabled by setting the
RETRYR bit to 1 in the Command
Byte register. See Table 3.
Table 13. Overtemperature Diagnostic
FAULT CONDITION
Overtemperature
Warning
STATUS REPORT
FLAG is asserted low.
FLAG bit set. See Table 7.
TWARN bit is set in the GFAULT
register. See Table 4.
FLAG is asserted low.
FLAG bit set. See Table 7.
Overtemperature
Shutdown
TSHDN bit is set in the GFAULT
Register. See Table 4.
Left and right channels switch
off and output goes to high-
impedance state.
UNMASK
In GMASK register, set
MTWARN bit to 1. See
Table 8.
In GMASK register, set
MTSHDN bit to 1. See
Table 8.
Cannot be masked.
RECOVERY
Die temperature falls below warning
threshold.
Cleared on reading the GFAULT
register.
Die temperature falls below
shutdown threshold.
Cleared on reading the GFAULT
register.
Note: 500ms autoretry in stand-
alone mode.
Left channel is enabled by setting
the RETRYL bit to 1 in the Command
Byte register.
Right channel is enabled by
setting the RETRYR bit to 1 in the
Command Byte register.
See Table 3.
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