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LTM4677 데이터시트(PDF) 79 Page - Analog Devices

부품명 LTM4677
상세설명  Dual Loop 8-Phase Step-Down DC/DC Controller with Digital Power System Management
PDF  110 Pages
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LTC3888-1
79
Rev. 0
For more information www.analog.com
MFR_PWM_MODE_LTC3888-1
The MFR_PWM_MODE_LTC3888-1 command sets important PWM controls for each master channel. The addressed
channel(s) must be turned off by its RUN pin, OPERATION command, or their combination when this command is
issued. Otherwise the LTC3888-1 will NACK the command byte, ignore the command and its data, and assert a BUSY
fault.
Bit Definitions
BIT
MEANING
7
(Reserved)
6
Enable VOUT servo. (VOUT_LOOP_SCALE should be programmed first.)
5
(Reserved, must write as 0)
4
Error Amplifier Disable:
0: Error Amplifier output (ITH) enabled. Channel operates as voltage loop master.
1: Error Amplifier output disabled (ITH high-Z input). Channel operates as slave phase to another master.
3
(Reserved)
2
(Reserved)
1
tON_MIN Control:
0: Minimum PWM On Time Set by Controller (can be < 30ns).
1: Minimum PWM On Time Limited to ≥ 30ns.
0
Power Stage UV HW Response: (see Applications Information for exceptions)
0: Rail ignores any UV indication on shared TEMP/FAULT bus.
1: Rail is latched off if UV is indicated on the shared TEMP/FAULT bus while operating.
(WARNING: Not all power stages support this feature.)
This command has one data byte.
PMBus COMMAND DETAILS (PWM Configuration)



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