Maxim-integrated MAX15301 PMBus Command Set Bedienungsanleitung PDF herunterladen (Seite 30)

MAX15301 PMBus Command Set User’s Guide

Rev 1 Page 30 of 53

Telemetry Commands

READ_VIN

Reference:

Standard Command

Lockable:

N/A

Command Code:

0x88

Format:

Linear

Data Bytes:

Units:

Transfer:

Read Word

Factory Value:

N/A

Description/Notes:

See Section 18.1 of the PMBus Specification Part II.

The MAX15301 has 12-bit measurement resolution for input voltage to a maximum value of about

14.75V.

READ_VOUT

Reference:

Standard Command

Lockable:

N/A

Command Code:

0x8B

Format:

Unsigned integer mantissa

Data Bytes:

Units:

Transfer:

Read Word

Factory Value:

N/A

Description/Notes:

See Section 18.4 of the PMBus Specification Part II.

The value of VOUT_TRIM is not subtracted from READ_VOUT, so non-zero VOUT_TRIM values will

result in a difference between VOUT_COMMAND and READ_VOUT.

The value of VOUT_CAL_OFFSET is subtracted from READ_VOUT, so VOUT_CAL_OFFSET values never

result in a difference between VOUT_COMMAND and READ_VOUT.

READ_IOUT

Reference:

Standard Command

Lockable:

N/A

Command Code:

0x8C

Format:

Linear

Data Bytes:

Units:

Transfer:

Read Word

Factory Value:

N/A

Description/Notes:

See Section 18.5 of the PMBus Specification Part II.

The MAX15301 has 8-bit measurement resolution for load current over a variable, symmetric bipolar

range of inductor DCR voltage. READ_IOUT data is filtered and decimated, so reported load current

may display greater than 8-bit resolution.

READ_IOUT must be calibrated by means of IOUT_CAL_GAIN and IOUT_CAL_OFFSET

to achieve

accurate results.

The value of READ_IOUT is temperature compensated for sense-element resistance change according

to READ_TEMPERATURE_2

and the resistive temperature coefficient value in the third data byte of

EXT_TEMP_CAL.

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