ISL78226 Datasheet, PDF (82/94 Pages) Intersil Corporation – Cycle-by-cycle peak current limiting

ISL78226
Continuous NOC Fault Flag (0xD6: Bit 4)
Indicates NOC condition has continuously occurred and turned off the external FETs.
Potentially, the low-side NMOS is shorted in Buck mode, high-side NMOS is shorted in Boost mode, or BAT48 is shorted to GND in Boost
mode.
0XD6 BIT4
DESCRIPTION
0
OK: No continuous NOC condition is detected.
1
NOC condition is continuously detected for more than three clock cycles and has turned off the external MOSFETs.
FAULT STATUS REGISTER-6 (0XD7)
Definition: Fault Status Register-6 -- BAT12/BAT48 overvoltage and undervoltage limit fault (protection level) status register
Data Length in Bytes: 1
Data Format: Bit Field
Typical: R/W
Protectable: Yes
Default Value: 00h
Units: N/A
REGISTER NAME
Format
Bit Position
Access
Function
FAULT STATUS REGISTER-6 (0XD7)
Bit Field
7
6
5
4
3
2
1
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
BAT48 Input BAT48 Input BAT48 Output BAT48 Output BAT12 Input BAT12 Input BAT12 Output BAT12 Output
Undervoltage Overvoltage Undervoltage Overvoltage Undervoltage Overvoltage Undervoltage Overvoltage
Limit
Limit
Limit
Limit
Limit
Limit
Limit
Limit
Default Value
0
0
0
0
0
0
0
0
BAT12 Output Overvoltage Limit (Protection Level) Fault Flag (0xd7: Bit 0)
The device detected BAT12 output overvoltage limit fault (protection level) in Buck mode.
0XD7 BIT0
DESCRIPTION
0
OK: No BAT12 output overvoltage limit fault .
1
BAT12 output overvoltage limit fault (protection level) is detected.
BAT12 Output Undervoltage Limit (Protection Level) Fault Flag (0xD7: Bit 1)
The device detected BAT12 output undervoltage limit fault (protection level) in Buck mode.
0XD7BIT1
DESCRIPTION
0
OK: No BAT12 output undervoltage limit fault.
1
BAT12 output undervoltage limit fault (protection level) is detected.
BAT12 Input Overvoltage Limit (Protection Level) Fault Flag (0xD7: Bit 2)
The device detected BAT12 Input Overvoltage Limit Fault (protection level) in Boost mode.
0XD7 BIT2
DESCRIPTION
0
OK: No BAT12 input overvoltage limit fault.
1
BAT12 input overvoltage limit fault (protection level) is detected.
BAT12 Input Undervoltage Limit (Protection Level) Fault Flag (0xD7: Bit 3)
The device detected BAT12 Input Undervoltage Limit Fault (protection level) in Boost mode.
0XD7 BIT3
DESCRIPTION
0
OK: No BAT12 input undervoltage limit fault.
1
BAT12 input undervoltage limit fault (protection level) is detected.
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FN8887.0
November 7, 2016