Maxim-integrated MAX15303 PMBus Command Set Instrukcja Użytkownika Pobierz pdf (Strona 30)

MAX15303 PMBus Command Set User’s Guide

Page 30 of 52

READ_TEMPERATURE_1

Reference:

Standard Command

Lockable:

N/A

Command Code:

0x8D

Format:

Linear

Data Bytes:

Units:

°C

Transfer:

Read Word

Factory Value:

N/A

Description/Notes:

See Section 18.6 of the PMBus Specification Part II.

The MAX15303 uses READ_TEMPERATURE_1 to report its internal (i.e., die) temperature.

READ_TEMPERATURE_2

Reference:

Standard Command

Lockable:

N/A

Command Code:

0x8E

Format:

Linear

Data Bytes:

Units:

°C

Transfer:

Read Word

Factory Value:

N/A

Description/Notes:

See Section 18.6 of the PMBus Specification Part II.

The MAX15303 uses READ_TEMPERATURE_2 to report external temperature as measured by an

external diode junction, typically placed near the power inductor to facilitate READ_IOUT

temperature compensation.

If no external diode junction is detected, READ_TEMPERATURE_2 returns a value of -273°C and is not

used for temperature faults or READ_IOUT temperature compensation.

The Maxim-specific command EXT_TEMP_CAL

can be used to adjust the diode ideality factor to

match that of the actual diode junction used for external temperature sensing and to add or remove

a fixed temperature offset for calibration purposes.

READ_DUTY_CYCLE

Reference:

Standard Command

Lockable:

N/A

Command Code:

0x94

Format:

Linear

Data Bytes:

Units:

Transfer:

Read Word

Factory Value:

N/A

Description/Notes:

See Section 18.9 of the PMBus Specification Part II.

The READ_DUTY_CYCLE command returns an averaged measure of the pulse-width modulator output

value in percent. The duty-cycle value is averaged over 256 PWM cycles.

READ_FREQUENCY

Reference:

Standard Command

Lockable:

N/A

Command Code:

0x95

Format:

Linear

Data Bytes:

Units:

kHz

Transfer:

Read Word

Factory Value:

N/A

Description/Notes:

See Section 18.10 of the PMBus Specification Part II.

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