ISL78226 Datasheet, PDF (60/94 Pages) Intersil Corporation – Cycle-by-cycle peak current limiting

ISL78226
Individual Fault Response Control Register 6 (0xB7)
Definition: BAT12 input and output overvoltage and undervoltage limit (protection) response setting
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
Default Value
INDIVIDUAL FAULT RESPONSE CONTROL REGISTER 6 (0XB7)
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
BAT12 Input Undervoltage BAT12 Input Overvoltage
BAT12 Output
BAT12 Output Overvoltage
Limit Fault Control Bits Limit Fault Control Bits Undervoltage Limit Fault Limit Fault Control Bits
Control Bits
0
0
0
0
0
0
0
0
BAT12 Output Overvoltage Limit Fault Control Bit (0xB7: Bit 1:0)
If the individual fault response enable/disable control bit (0xB0[7]) is “1”, the device selects the fault response when BAT12 exceeds
the second level of overvoltage threshold. If the individual fault response enable/disable control bit (0xB0[7]) is “0”, the “MODE” pin
setting will be used for the fault control and this register setting will be ignored.
BIT1
BIT0
DESCRIPTION
0
0
Flagging only (Default)
When BAT12 output voltage exceeds the second overvoltage threshold, the corresponding fault status register
(0xD7[0]) will be set to “1”, and XALERT will be pulled low. The system continues to operate. No hiccup or latch-off
responses.
0
1
Hiccup (Auto Restart)
When BAT12 output voltage exceeds the second overvoltage threshold, the corresponding fault status register
(0xD7[0]) will be set to “1”, and XALERT will be pulled low. At the same time, the system stops PWM switching. The
PWM switching will recover automatically 500ms (typical) after the overvoltage condition is removed.
1
0
Latch-off
When BAT12 output voltage exceeds the second overvoltage threshold, the corresponding fault status register
(0xD7[0]) will be set to “1”, and XALERT will be pulled low. At the same time, the system stops PWM switching. The
PWM switching will not recover automatically when the overvoltage condition is removed. To recover the switching,
toggle PWM_EN or EN.
1
1
Flagging only (same as “0,0”)
Submit Document Feedback ₆₀
FN8887.0
November 7, 2016