MC35XS3400 FREESCALE [Freescale Semiconductor, Inc], MC35XS3400 Datasheet - Page 26

• Manufacturer Part Number: MC35XS3400
• Description: Quad High Side Switch (Quad 35m?)
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

AUTO-RETRY
automatically in case of over-current or over-temperature or
under-voltage failure conditions to provide a high availability
of the load.
in case of internal retry signal is set to logic [1]:
retry[x] = OC[x] or OT[x] or UV.
auto-retry period (t
occurrence (16 for each output). The counter of retry
occurrences is reset in case of Fail-safe to Normal or Normal
to Fail-safe mode transitions. At each auto-retry, the over-
current detection will be set to default values in order to
sustain the inrush current.
DIAGNOSTIC
Output Shorted to VPWR Fault
detection circuitry in OFF state. Output shorted to VPWR fault
is detected if output voltage is higher than
reported as a fault condition when the output is disabled
(OFF). The output shorted to VPWR fault is latched into the
26
35XS3400
FUNCTIONAL DEVICE OPERATION
PROTECTION AND DIAGNOSTIC FEATURES
(OpenloadOFF=1
or OV=1)
or ShortVpwr=1
The auto-retry circuitry is used to reactivate the output(s)
Auto-retry feature is available in Fault mode. It is activated
The feature retries to switch-on the output(s) after one
The
The 35XS3400 incorporates output shorted to VPWR
Figure 12
if hson=0
OFF
describes the auto-retry state machine.
AUTO
) with a limitation in term of number of
(fault_control=1 and OV=0)
(fault_control=0 or OV=1)
(fault_control=0)
V
OSD(THRES)
Figure 12. Auto-retry State Machine
(OpenloadOFF=1
or OV=1)
or ShortVpwr=1
and
if hson=1
Autoretry
(fault_control=0)
(fault_control=0)
ON
OFF
(OpenloadON=1)
(Retry=1)
status register after the internal gate voltage is pulled low
enough to turn OFF the output. The OS[0:3] and
OL_OFF[0:3] fault bits are set in the status register and FS
pin reports in real time the fault. If the output shorted to
VPWR fault is removed, the status register will be cleared
after reading the register.
disabled through SPI (OS_DIS[0:3] bit).
Open-Load Faults
detection circuitries on the output to detect in OFF and in ON
state.
Open-load Detection In Off State
output voltage is higher than
internal current source (
condition when the output is disabled (OFF). The OFF Output
open-load fault is latched into the status register or when the
internal gate voltage is pulled low enough to turn OFF the
output. The OL_OFF[0:3] fault bit is set in the status register.
If the open load fault is removed (FS output pin goes to high),
the status register will be cleared after reading the register.
through SPI (OLOFF_DIS[0:3] bit).
The 35XS3400 incorporates three dedicated open-load
The open output shorted to VPWR protection can be
The OFF output open-load fault is detected when the
The OFF output open-load protection can be disabled
(after Retry Period and OV=0)
=> count=count+1
(Retry=1)
(SC=1)
(count=16)
(OV=1)
Analog Integrated Circuit Device Data
I
OLD(OFF)
V
OLD(THRES)
) and reported as a fault
Freescale Semiconductor
Latched
Autoretry
if hson=1
OFF
(SC=1)
ON
pulled up with
(OpenloadOFF=1
or OV=1)
or ShortVpwr=1
(OpenloadON=1)