LTC4280
25
4280f
APPLICATIONS INFORMATION
Table 4. STATUS Register C (02h)—Read
BIT NAME OPERATION
C7 FET On 1 = FET On, 0 = FET Off
C6 GPIO Input State of the GPIO Pin; 1 = GPIO High, 0 = GPIO Low
C5 FET Short
Present
Indicates Potential FET Short if Current Sense Voltage Exceeds 1mV While FET is Off; 1 = FET is Shorted, 0 = FET is Not
Shorted
C4 EN Indicates if the LTC4280 is enabled when EN is low; 1 = EN Pin Low, 0 = EN Pin High
C3 Power Bad Indicates Power is Bad when FB is low; 1 = FB Low, 0 = FB High
C2 Overcurrent Indicates Overcurrent Condition During Cool Down Cycle; 1 = Overcurrent, 0 = Not Overcurrent
C1 Undervoltage Indicates Input Undervoltage when UV is Low; 1 = UV Low, 0 = UV High
C0 Overvoltage Indicates V
DD
or OV Input Overvoltage when OV is High; 1 = OV High, 0 = OV Low
Table 5. FAULT Register D (03h)—Read/Write
BIT NAME OPERATION
D7:6 Reserved
D5 FET Short Fault
Occurred
Indicates Potential FET Short was Detected when Measured Current Sense Voltage Exceeded 1mV while FET was Off;
1 = FET is Shorted, 0 = FET is Good
D4 EN Changed
State
Indicates That the LTC4280 was Enabled or Disabled when EN Changed State; 1 = EN Changed State, 0 = EN Unchanged
D3 Power Bad
Fault Occurred
Indicates Power was Bad when FB when Low; 1 = FB was Low, 0 = FB was High
D2 Overcurrent
Fault Occurred
Indicates Overcurrent Fault Occurred; 1 = Overcurrent Fault Occurred, 0 = Not Overcurrent Faults
D1 Undervoltage
Fault Occurred
Indicates Input Undervoltage Fault Occurred when UV went Low; 1 = UV was Low, 0 = UV was High
D0 Overvoltage
Fault Occurred
Indicates Input Overvoltage Fault Occurred when OV went High; 1 = OV was High, 0 = OV was Low
Table 6. SENSE Register E (04h)—Read/Write
BIT NAME OPERATION
E7:0 SENSE Voltage Measurement Sense Voltage Data. 8-Bit Data with 151µV LSB and 38.45mV Full Scale.
Table 7. SOURCE Register F (05h)—Read/Write
BIT NAME OPERATION
F7:0 SOURCE Voltage Measurement Source Voltage Data. 8-Bit Data with 60.5mV LSB and 15.44V Full Scale.
Table 8. ADIN Register G (06h)—Read/Write
BIT NAME OPERATION
G7:0 ADIN Voltage Measurement ADIN Voltage Data. 8-Bit Data with 4.82mV LSB and 1.23V Full Scale.
