ISL78226 Datasheet, PDF (70/94 Pages) Intersil Corporation – Cycle-by-cycle peak current limiting

ISL78226
Buck Mode BAT12 Short to GND Fault Response Control Bit (0xBD: Bit 2)
Set the XSYS_FAIL function when detecting the potential short of H/S MOSFET in Buck mode operation.
BIT0
DESCRIPTION
0
Pull down XSYS_FAIL when the potential short of BAT12 to GND is detected in Buck mode (default).
PWM switching will stop immediately and latch-off. To restart, toggle EN or PWM_EN.
1
Do not pull down XSYS_FAIL when the potential short of BAT12 to GND is detected in Buck mode.
PWM switching shut off or keep running will depend on the related fault (NOC, BAT12 UV) response settings.
Buck Mode Low-Side MOSFET Short Fault Response Control Bit (0xBD: Bit 4)
Set the XSYS_FAIL function when detecting the potential short of L/S MOSFET in Buck mode operation.
BIT0
DESCRIPTION
0
Pull down XSYS_FAIL when the potential H/S MOSFET short is detected in Buck mode (default).
PWM switching will stop immediately and latch-off. To restart, toggle EN or PWM_EN.
1
Do not pull down XSYS_FAIL when the potential H/S MOSFET short is detected in Buck mode.
PWM switching shut off or keep running will depend on the related fault (NOC, BAT12 UV) response settings.
Boost Mode Low-Side MOSFET Short Fault Response Control Bit (0xBD: Bit 5)
Set the XSYS_FAIL function when detecting the potential short of L/S MOSFET in Boost mode operation.
BIT0
DESCRIPTION
0
Pull down XSYS_FAIL when the potential H/S MOSFET short is detected in Buck mode (default).
PWM switching will stop immediately and latch-off. To restart, toggle EN or PWM_EN.
1
Do not pull down XSYS_FAIL when the potential H/S MOSFET short is detected in Buck mode.
PWM switching shut off or keep running will depend on the related fault (OC2, BAT12 UV) response settings.
Buck Mode BAT48 Short to GND Fault Response Control Bit (0xBD: Bit 6)
Set the XSYS_FAIL function when detecting the potential short of BAT48 to GND in Buck mode operation.
BIT0
DESCRIPTION
0
Pull down XSYS_FAIL when the potential short of BAT48 to GND is detected in Buck mode (default).
PWM switching will stop immediately and latch-off. To restart, toggle EN or PWM_EN.
1
Do not pull down XSYS_FAIL when the potential short of BAT48 to GND is detected in Buck mode.
PWM switching shut off or keep running will depend on the related fault (OC2, BAT12 UV) response settings.
Boost Mode BAT48 Short to GND Fault Response Control Bit (0xBD: Bit 7)
Set the XSYS_FAIL function when detecting the potential short of H/S MOSFET in Buck mode operation.
BIT0
DESCRIPTION
0
Pull down XSYS_FAIL when the potential short of BAT48 to GND is detected in Buck mode (default).
PWM switching will stop immediately and latch-off. To restart, toggle EN or PWM_EN.
1
Do not pull down XSYS_FAIL when the potential short of BAT48 to GND is detected in Buck mode.
PWM switching shut off or keep running will depend on the related fault (OC2, BAT12 UV) response settings.
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FN8887.0
November 7, 2016