ISL78229 Datasheet, PDF (41/71 Pages) Intersil Corporation – 2-Phase Boost Controller with Drivers

ISL78229
TABLE 3. REGISTERS TO MONITOR FAULT STATUS AND CONFIGURE FAULT RESPONSE
COMMAND
CODE
REGISTER NAME
FORMAT
ACCESS
DESCRIPTIONS
DEFAULT
VALUE
D0h FAULT_STATUS
Bit Field
R/W
1: Fault occurred
0: No fault
See Table 4
D1h FAULT_MASK
Bit Field
R/W
1: Ignore fault with no protection response See Table 4
0: Hiccup or Latch-off fault response
D2h SET_FAULT_RESPONSE Bit Field
R/W
0: Latch-off
1: Hiccup
See Table 4
REFER
TO PAGE
Page 58
Page 59
Page 60
FAULT NAME
CML
OT_NTC_WARN
VIN_OV
TABLE 4. FAULT NAMES LIST FOR THE REGISTERS (WITH DEFAULT VALUES) IN Table 3
BIT
NUMBER
D0h
DEFAULT
VALUE
D1h
DEFAULT
VALUE
D2h
DEFAULT VALUE SET BY
HIC/LATCH PIN
HIC/LATCH = GND:
BITS [9:0] = 00000000
HIC/LATCH = VCC:
BITS [9:0] = 11111111
RELATED FAULT TO BE MONITORED/CONTROLLED
0
0
1
Set by the HIC/LATCH pin Communications warning (for unsupported command,
PEC error)
1
0
0
Set by the HIC/LATCH pin External over-temperature warning (NTC_PIN<450mV as
default, threshold programmable)
2
0
0
Set by the HIC/LATCH pin Input overvoltage fault (VIN_PIN>58V)
OT_NTC_FAULT
3
0
OC_AVG
4
0
1
Set by the HIC/LATCH pin External over-temperature fault (NTC_PIN<300mV as
default, threshold programmable)
0
Set by the HIC/LATCH pin Input average overcurrent fault (IMON_PIN> 2V)
OC2_PEAK
VOUT_UV
5
0
6
0
VOUT_OV
7
0
PLLCOMP_SHORT
8
0
PLL_LOCK
9
0
0
Set by the HIC/LATCH pin Peak overcurrent fault (I_SENx>105µA)
1
Set by the HIC/LATCH pin Output undervoltage fault (FB_PIN<80%VREF_DAC as
default, threshold programmable)
0
Set by the HIC/LATCH pin Output overvoltage fault (FB_PIN>120%VREF_DAC as
default, threshold programmable)
0
Set by the HIC/LATCH pin PLLCOMP PIN shorted to high potential voltages
(PLLCOMP_PIN>1.7V)
0
Set by the HIC/LATCH pin PLL loop fault due to reaching minimum frequency
(Detect the minimum frequency of 37kHz as typical)
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FN8656.3
February 12, 2016