ISL78226 Datasheet, PDF (81/94 Pages) Intersil Corporation – Cycle-by-cycle peak current limiting

ISL78226
NOC Fault Flag (0xD5: Bit 2)
Indicates whether Negative Overcurrent (NOC) condition is detected or not.
When this flag is altered, NOC has occurred and the phase location can be obtained by reading Fault Status Register-10 (0xD9).
0XD5 BIT2
DESCRIPTION
0
OK: NOC is not detected.
1
NOC is detected at PWMx.
CCL Operation Indicator (0xD5: Bit 4)
Indicates the device is operating in Constant Current Control Loop (CCL) mode.
0XD5 BIT4
DESCRIPTION
0
Not in CCL operation. (Constant Voltage Output).
1
Device is operating in CCL mode.
ACP Fault Flag (0xD5: Bit 5)
Indicates the device detected Average Current Limit Protection (ACP) fault.
0XD5 BIT5
DESCRIPTION
0
OK: ACP is not detected.
1
ACP fault is detected.
Thermal Protection Fault Flag (0xD5: Bit 7)
Indicates the device has detected a thermal protection condition (T_J > 150°C).
0XD5 BIT7
DESCRIPTION
0
OK: Normal temperature range. (T_J > 150°C).
1
Thermal Protection condition (T_J > 150°C) is detected.
FAULT STATUS REGISTER-5 (0XD6)
Definition: Serious overcurrent fault 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
7
6
Access
R/W
R/W
Function
Reserved
Default Value
0
0
5
R/W
0
FAULT STATUS REGISTER-5 (0XD6)
Bit Field
4
3
2
R/W
R/W
R/W
Continuous
NCO
Reserved
Continuous
OC2
0
0
0
1
0
R/W
R/W
Reserved
0
0
Continuous OC2 Fault Flag (0xD6: Bit 2)
Indicates OC2 condition has continuously occurred and turned off the external FETs.
Potentially, the high-side NMOS is shorted in Buck mode, low side NMOS is shorted in Boost mode, or BAT12 is shorted to GND in Buck
mode.
0XD6 BIT2
DESCRIPTION
0
OK: No continuous OC2 condition is detected.
1
OC2 condition is continuously detected for more than three clock cycles and has turned off the external MOSFETs.
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FN8887.0
November 7, 2016