Analog Integrated Circuit Device Data



Freescale Semiconductor

33

07XSC200

Figure 13. Auto-retry State Machine

5.3.2

Auto-retry

The auto-retry circuitry is used to reactivate the output(s) automatically in case of overcurrent or overtemperature or undervoltage

failure conditions to provide a high availability of the load.

Auto-retry feature is available in Fault mode. It is activated in case of internal retry signal is set to logic [1]:

retry[x] = OC[x] or OT[x] or UV.

(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 overcurrent detection will be set to default values in order to sustain the inrush current.

The Figure 13 describes the auto-retry state machine.

5.3.3

Diagnostic

OS[0:1] and OL_OFF[0:1] fault bits are set in the status register and FSB pin reports in real time the fault. If the output shorted

OpenLoad Faults

The 07XSC200 incorporates three dedicated OpenLoad detection circuitries on the output to detect in OFF and in ON state.

OFF

ON

Latched

OFF

Auto-retry

OFF

Auto-retry

ON

(SC=1)

(OV=1)

(fault_control=1 and OV=0)

(fault_control=0 or OV=1)

(fault_control=0)

(fault_control=0)

(fault_control=0)

(SC=1)

(Retry=1)

=> count=count+1

(Retry=1)

(count=16)

(after Retry Period and OV=0)

(OpenloadOFF=1

or ShortVpwr=1

(OpenloadOFF=1

or ShortVpwr=1

(OpenloadOFF=1

or ShortVpwr=1

(OpenloadON=1)

(OpenloadON=1)

or OV=1)

or OV=1)

or OV=1)

if hson=1

if hson=0

if hson=1