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LTM4686BIVPBF 데이터시트(PDF) 94 Page - Analog Devices

부품명 LTM4686BIVPBF
상세설명  Ultrathin Dual 14A or Single 28A 關Module Regulator with Digital Power System Management
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LTM4686B
94
Rev. 0
For more information www.analog.com
APPENDIX C: PMBUS COMMAND DETAILS
Output Current
COMMAND NAME
CMD CODE DESCRIPTION
TYPE
PAGED
DATA
FORMAT
UNITS
NVM
DEFAULT
VALUE
IOUT_OC_FAULT_LIMIT
0x46
Output overcurrent fault limit.
R/W Word
Y
L11
A
Y
36
0xE240
IOUT_OC_WARN_LIMIT
0x4A
Output overcurrent warning limit.
R/W Word
Y
L11
A
Y
20.5
0xDA90
IOUT_OC_FAULT_LIMIT
The IOUT_OC_FAULT_LIMIT command sets the value of the peak output current limit, in amperes. When the controller
is in current limit, the overcurrent detector will indicate an overcurrent fault condition. The programmed overcurrent
fault limit value is rounded up to the nearest one of the following set of discrete values:
25mV/IOUT_CAL_GAIN
Low Range (1.5x Nominal Loop Gain)
MFR_PWM_MODE [7] = 0
28.6mV/IOUT_CAL_GAIN
32.1mV/IOUT_CAL_GAIN
35.7mV/IOUT_CAL_GAIN
39.3mV/IOUT_CAL_GAIN
42.9mV/IOUT_CAL_GAIN
46.4mV/IOUT_CAL_GAIN
50mV/IOUT_CAL_GAIN
37.5mV/IOUT_CAL_GAIN
High Range (Nominal Loop Gain)
MFR_PWM_MODE [7] = 1
42.9mV/IOUT_CAL_GAIN
48.2mV/IOUT_CAL_GAIN
53.6mV/IOUT_CAL_GAIN
58.9mV/IOUT_CAL_GAIN
64.3mV/IOUT_CAL_GAIN
69.6mV/IOUT_CAL_GAIN
75mV/IOUT_CAL_GAIN
Note: This is the peak of the current waveform. The READ_IOUT command returns the average current. The peak output
current limits are adjusted with temperature based on the MFR_IOUT_CAL_GAIN_TC using the equation:
IOUT_OC_FAULT_LIMIT = IOUT_CAL_GAIN • (1 + MFR_IOUT_CAL_GAIN_TC • (READ_TEMPERTURE_1-27.0)).
The LTpowerPlay GUI automatically convert the voltages to currents.
The IOUT range is set with bit 7 of the MFR_PWM_MODE command.
The IOUT_OC_FAULT_LIMIT is ignored during TON_RISE and TOFF_FALL.
This command has two data bytes and is formatted in Linear_5s_11s format.
IOUT_OC_WARN_LIMIT
This command sets the value of the output current that causes an output overcurrent warning in amperes. The
READ_IOUT value will be used to determine if this limit has been exceeded.



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