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FUNCTIONAL DEVICE OPERATION
PROTECTION AND DIAGNOSIS FEATURES
(external_ON = 0)
(OT = 1) or
(OCHI1 = 1)
OFF-latched
State
(OT = 1
(external_ON = 0)
(OT=1)
(external_ON = 1)
(t>t OCHI1 ) and (auto restart = 0)
(t>t OCHI2 ) and (auto restart = 0)
OFF
out: OFF
auto restart = 0
OCHI1
out: external
OCHI2
out: external
OCLO
out: external
(t>t OCHI1_AUTO ) and (auto restart = 1)
(UV = 1
(UV = 1) and
(t>t autorestart )
(UV* = 0)
and
(UV = 1) or (OCHI2 = 1)
(external_on = 1)
(OCLO = 1) or
(UV = 1)
OFF Autorestart
out: OFF
(external_ON = 0)
autorestart=1
(external_ON = 0)
1.4 sec min
external
external_ON
external: IGN, FLASHER, FOG
external_ON: IGN_ON, Flasher_ON, FOG_ON
Note: * See Autorestart strategy chapter.
Figure 14. Faults Management in Fail Mode (for OUT[1:5] only)
DIAGNOSTIC
Open Load
The 10XS3535 provides open load detection for each
output (OUT1:OUT5 ) when the output pin is in the ON state.
Open load detection levels can be chosen by SPI to detect a
standard bulb, a Xenon bulb for OUT2 only, or LEDs (OLLED
bit). Open load for LEDs only is detected during each regular
switch-off state or periodically each t OLLED (fully-on,
D[6:0] = 7F) . To detect OLLED in fully on state, the output
must be on at least t OLLED. When an open load has been
detected, the output stays ON.
To delatch the diagnosis, the condition should be removed
and the SPI read operation is needed (OL bit). In case of a
Power on Reset on VBAT, the fault will be reset.
Current Sense
The 10XS3535 diagnosis for load current (OUT1:6) is
done using the current sense (CSNS) pin connected to an
external resistor. The CSNS resistance value is defined in
function to VCC voltage value. It is recommended to use
resistor 500 ? < R CSNS < 5.0 k ? . Typical value is 1.0 k ? for
5.0 V application. The routing of the current sense sources is
SPI programmable (MUX[2,0] bits).
MC10XS3535
Analog Integrated Circuit Device Data ?
36
Freescale Semiconductor
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