LTC2977 datasheet(102/138 Pages) AD

102 / 138 page

LTM4664A

102

Rev. 0

For more information www.analog.com

MFR_VOUT_MAX

The MFR_VOUT_MAX command is the maximum output voltage in volts for each channel, including VOUT_OV_FAULT_

LIMIT. If the output voltages are set to high range (Bit 6 of MFR_PWM_CONFIG set to a 0) MFR_VOUT_MAX is 3.6V. If

the output voltage is set to low range (Bit 6 of MFR_PWM_CONFIG set to a 1) the MFR_VOUT_MAX is 2.75V. Entering

a VOUT_COMMAND value greater than this will result in a CML fault and the output voltage setting will be clamped to

the maximum level. This will also result in Bit 3 VOUT_MAX_Warning in the STATUS_VOUT command being set. The

maximum value to program is 1.8V and maximum operating is 1.5V.

This read only command has 2 data bytes and is formatted in Linear_16u format.

OUTPUT CURRENT AND LIMITS

COMMAND NAME

CMD CODE DESCRIPTION

TYPE

PAGED

DATA

FORMAT UNITS

NVM

DEFAULT

VALUE

MFR_IOUT_CAL_GAIN

0xDA

The ratio of the voltage at the current

sense pins to the sensed current. For

devices using a fixed current sense

resistor, it is the resistance value in

mΩ.

R Word

L11

mΩ

0.375

0xD018

MFR_IOUT_CAL_GAIN_TC

0xF6

Temperature coefficient of the current

sensing element.

R/W Word

3900

0x0F3C

IOUT_OC_FAULT_LIMIT

0x46

Output overcurrent fault limit.

R/W Word

L11

45.0

0xE2D0

IOUT_OC_WARN_LIMIT

0x4A

Output overcurrent warning limit.

R/W Word

L11

34.0

0xE230

MFR_IOUT_CAL_GAIN

The MFR_IOUT_CAL_GAIN command is used to set the resistance value of the current sense resistor in milliohms.

(see also MFR_IOUT_CAL_GAIN_TC).

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

MFR_IOUT_CAL_GAIN_TC

The MFR_IOUT_CAL_GAIN_TC command allows the user to program the temperature coefficient of the IOUT_CAL_

GAIN sense resistor or inductor DCR in ppm/°C.

This command has two data bytes and is formatted in 16-bit 2’s complement integer ppm. N = –32768 to 32767 •

10–6. Nominal temperature is 27°C. The MFR_IOUT_CAL_GAIN is multiplied by:

[1.0 + MFR_IOUT_CAL_GAIN_TC • (READ_TEMPERATURE_1-27)].

DCR sensing will have a typical value of 3900.

The MFR_IOUT_CAL_GAIN and MFR_IOUT_CAL_GAIN_TC impact all current parameters including: READ_IOUT,

MFR_IOUT_PEAK, IOUT_OC_FAULT_LIMIT and IOUT_OC_WARN_LIMIT.

PMBus COMMAND DETAILS

LTC2977 Datasheet(PDF) 102 Page - Analog Devices

LTC2977 Datasheet(HTML) 102 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL