EVAL-ADM1275EBZ Datasheet, PDF (38/48 Pages) Analog Devices – Hot-Swap Controller and Digital Power

ADM1275
Data Sheet
IOUT_WARN2_LIMIT
Code: 0xD7, read/write word. Value after reset: 0x0000.
Table 17. Bit Descriptions for IOUT_WARN2_LIMIT Command
Bits
Bit Name
Settings Description
[15:12] Reserved
0000 Always reads as 0000.
[11:0] IOUT_WARN2_LIMIT
Threshold for the IOUT measurement through the sense resistor, expressed in ADC
codes. This value can be either an undercurrent or an overcurrent, depending on the
state of the IOUT_WARN2_SELECT bit set using the DEVICE_CONFIG command.
VIN_OV_WARN_LIMIT
Code: 0x57, read/write word. Value after reset: 0x0FFF.
Table 18. Bit Descriptions for VIN_OV_WARN_LIMIT Command
Bits
Bit Name
Settings Description
[15:12] Reserved
0000 Always reads as 0000.
[11:0] VIN_OV_WARN_LIMIT
Overvoltage threshold for the SENSE+ pin measurement, expressed in ADC codes.
VIN_UV_WARN_LIMIT
Code: 0x58, read/write word. Value after reset: 0x0000.
Table 19. Bit Descriptions for VIN_UV_WARN_LIMIT Command
Bits
Bit Name
Settings Description
[15:12] Reserved
0000 Always reads as 0000.
[11:0] VIN_UV_WARN_LIMIT
Undervoltage threshold for the SENSE+ pin measurement, expressed in ADC codes.
STATUS_BYTE
Code: 0x78, read byte. Value after reset: 0x00.
Table 20. Bit Descriptions for STATUS_BYTE Command
Bits
Bit Name
Behavior Settings
7
Reserved
0
6
HOTSWAP_OFF
Live
0
1
5
Reserved
4
IOUT_OC_FAULT
0
Latched
0
1
3
VIN_UV_FAULT
2
Reserved
1
CML_ERROR
Latched
0
1
0
Latched
0
1
0
NONE_OF_THE_ABOVE
Live
0
1
Description
Always reads as 0.
The hot-swap gate drive output is enabled.
The hot-swap gate drive output is disabled, and the GATE pin is pulled
down. This can be due to, for example, an overcurrent fault that causes
the ADM1275 to latch off, an undervoltage condition on the UV pin, or
the use of the OPERATION command to turn the output off.
Always reads as 0.
No overcurrent output fault detected.
The hot-swap controller detected an overcurrent condition and the time
limit set by the capacitor on the TIMER pin has elapsed, causing the hot-
swap gate drive to shut down.
No undervoltage input fault detected on the UV pin.
An undervoltage input fault was detected on the UV pin.
Always reads as 0.
No communications error detected on the I²C/PMBus interface.
An error was detected on the I²C/PMBus interface. Errors detected are
unsupported command, invalid PEC byte, and incorrectly structured
message.
No other active status bit to be reported by any other status command.
Active status bits are waiting to be read by one or more status commands.
Rev. D | Page 38 of 48