LTC2977 datasheet(127/138 Pages) AD

127 / 138 page

LTM4664A

127

Rev. 0

For more information www.analog.com

PMBus COMMAND DETAILS

READ_VIN

The READ_VIN command returns the measured VIN pin voltage, in volts added to READ_ICHIP • MFR_RVIN. This

compensates for the IR voltage drop across the VIN filter element due to the supply current of the LTM4664A.

This read-only command has two data bytes and is formatted in Linear_5s_11s format.

READ_VOUT

The READ_VOUT command returns the measured output voltage by the VOUT_MODE command.

This read-only command has two data bytes and is formatted in Linear_16u format.

READ_IIN

The READ_IIN command returns the input current, in Amperes, as measured across the input current sense resistor

(see also MFR_IIN_CAL_GAIN).

This read-only command has two data bytes and is formatted in Linear_5s_11s format.

READ_IOUT

The READ_IOUT command returns the average output current in amperes. The IOUT value is a function of:

a) the differential voltage measured across the ISENSE pins

b) the MFR_IOUT_CAL_GAIN value

c) the MFR_IOUT_CAL_GAIN_TC value, and

d) READ_TEMPERATURE_1 value

e) The MFR_TEMP_1_GAIN and the MFR_TEMP_1_OFFSET

This read-only command has two data bytes and is formatted in Linear_5s_11s format.

READ_TEMPERATURE_1

The READ_TEMPERATURE_1 command returns the temperature, in degrees Celsius, of the power stage sense element.

This read-only command has two data bytes and is formatted in Linear_5s_11s format.

READ_TEMPERATURE_2

The READ_TEMPERATURE_2 command returns the LTM4664A’s die temperature, in degrees Celsius, of the internal

sense element.

This read-only command has two data bytes and is formatted in Linear_5s_11s format.

READ_FREQUENCY

The READ_FREQUENCY command is a reading of the PWM switching frequency in kHz.

This read-only command has 2 data bytes and is formatted in Linear_5s_11s format.

READ_POUT

The READ_POUT command is a reading of the DC/DC converter output power in Watts. POUT is calculated based on

the most recent correlated output voltage and current reading.

This read-only command has 2 data bytes and is formatted in Linear_5s_11s format.

LTC2977 Datasheet(PDF) 127 Page - Analog Devices