LTM4677 datasheet(79/110 Pages) AD

79 / 110 page

LTC3888-1

Rev. 0

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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

(Reserved)

Enable VOUT servo. (VOUT_LOOP_SCALE should be programmed first.)

(Reserved, must write as 0)

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.

(Reserved)

tON_MIN Control:

0: Minimum PWM On Time Set by Controller (can be < 30ns).

1: Minimum PWM On Time Limited to ≥ 30ns.

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)

LTM4677 Datasheet(PDF) 79 Page - Analog Devices