LTC3882_15 Datasheet, PDF (75/104 Pages) Linear Technology – Dual Output PolyPhase Step-Down DC/DC Voltage Mode Controller with Digital Power System Management

LTC3882
PMBus COMMAND DETAILS (Input Voltage and Limits)
INPUT VOLTAGE AND LIMITS
COMMAND NAME
CMD
CODE DESCRIPTION
VIN_ON
0x35 Minimum input voltage to begin power
conversion.
VIN_OFF
0x36 Decreasing input voltage at which power
conversion stops.
VIN_OV_FAULT_LIMIT
0x55 V_IN overvoltage fault limit.
DATA
TYPE PAGED FORMAT
R/W Word N
L11
R/W Word N
L11
R/W Word N
L11
VIN_UV_WARN_LIMIT
0x58 V_IN undervoltage warning limit.
R/W Word N
L11
Related commands: STATUS_INPUT, SMBALERT_MASK, READ_VIN, VIN_OV_FAULT_RESPONSE
UNITS NVM
V
l
V
l
V
l
V
l
DEFAULT
VALUE
6.5V
0xCB40
6.0V
0xCB00
15.5V
0xD3E0
6.3V
0xCB26
VIN_ON
The VIN_ON command sets the input voltage, in volts, required to start power conversion.
This command has two data bytes in Linear_5s_11s format.
VIN_OFF
The VIN_OFF command sets the minimum input voltage, in volts, at which power conversion stops.
This command has two data bytes in Linear_5s_11s format.
VIN_OV_FAULT_LIMIT
The VIN_OV_FAULT_LIMIT command sets the value of the input voltage measured by the ADC, in volts, that causes
an input overvoltage fault.
This command has two data bytes in Linear_5s_11s format.
VIN_UV_WARN_LIMIT
The VIN_UV_WARN_LIMIT command sets the value of input voltage measured by the ADC that causes an input under-
voltage warning. This warning is disabled until the input exceeds the input startup threshold value set by the VIN_ON
command and the unit has been enabled. If the VIN_UV_WARN_LIMIT is then exceeded, the device:
• Sets the INPUT Bit in the STATUS_WORD
• Sets the V_IN Undervoltage Warning Bit in the STATUS_INPUT Command
• Notifies the Host by Asserting ALERT, Unless Masked
For more information www.linear.com/LTC3882
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