max5961 Maxim Integrated Products, Inc., max5961 Datasheet - Page 37

• Manufacturer Part Number: max5961
• Description: 0 To 16v, Quad, Hot-swap Controller With 10-bit Current And Voltage Monitor
• Manufacturer: Maxim Integrated Products, Inc.

These fault register bits latch upon a fault condition, and
must be reset manually by writing a zero to the register,
or by restarting the affected channel as described in the
Autoretry or Latched-Off Fault Management section.
When an overcurrent event (fast-trip or slow-trip) causes
the MAX5961 to shut down the affected channel(s), a cor-
responding open-drain FAULT_ output is asserted low.
Note that the FAULT_ outputs are not asserted for shut-
downs caused by critical undervoltage or overvoltage.
Table 48. Overvoltage Status Register Format
Table 49. Overcurrent Warning Status Register Format
Table 50. Circuit-Breaker Event Logging Register Format
Description:
Register Title:
Register Address:
Description:
Register Title:
Register Address:
Description:
Register Title:
Register Address:
ch4_ov2
ch4_st
bit 7
bit 7
bit 7
R/C
R/C
R
ch3_st
ch3_ov2
______________________________________________________________________________________
bit 6
bit 6
with 10-Bit Current and Voltage Monitor
bit 6
R/C
R/C
R
Circuit-breaker slow- and fast-trip event logging
status0
0x5F
0 to 16V, Quad, Hot-Swap Controller
Overvoltage digital-compare status register (warning [3:0] and critical [7:4] overvoltage event
detection status)
fault1
0x64
Overcurrent digital-compare status register (overcurrent warning event detection status)
fault2
0x65
ch2_st
ch2_ov2
bit 5
R
bit 5
bit 5
R/C
R/C
FAULT_ Outputs
ch1_st
ch1_ov2
bit 4
R
bit 4
bit 4
R/C
R/C
ch4_ft
bit 3
ch4_ov1
R
ch4_oi
bit 3
R/C
bit 3
R/C
The FAULT_ output is cleared when the channel is dis-
abled by pulling ON_ low or by clearing the Chx_EN1
or Chx_EN2 bits in register chxen.
The ALERT output is an open-drain output that is assert-
ed low any time that a fault or other condition requiring
attention has occurred. The state of the ALERT output is
also indicated by bit 4 of the status3 register.
ALERT is the NOR of registers 0x5F, 0x63, 0x64, and 0x65,
so when the ALERT output goes low, the system microcon-
troller (µC) should query these registers through the I
interface to determine the cause of the ALERT assertion.
ch3_ft
bit 2
ch3_ov1
R
ch3_oi
bit 2
R/C
bit 2
R/C
ch2_ft
bit 1
R
ch2_ov1
ch2_oi
bit 1
R/C
bit 1
R/C
ch1_ft
ch1_ov1
bit 0
ALERT Output
ch1_oi
R
bit 0
R/C
bit 0
R/C
VALUE
VALUE
RESET
VALUE
RESET
RESET
0x00
0x00
--
2
37
C