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LTM4686BIVPBF 数据表(PDF) 117 Page - Analog Devices |
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LTM4686BIVPBF 数据表(HTML) 117 Page - Analog Devices |
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117 / 130 page  LTM4686B 117 Rev. 0 For more information www.analog.com APPENDIX C: PMBUS COMMAND DETAILS READ_VIN The READ_VIN command returns the measured SVIN input voltage, in volts. 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 in the same format as set 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. Note: Input current is calculated from READ_IOUT current and the READ_DUTY_CYCLE value from both outputs plus the MFR_IIN_OFFSET. For accurate values at low currents the part must be in continuous conduction mode. The greatest source of error if DCR sensing is used, is the accuracy of the inductor parasitic DC resistance (DCR) at room temperature IOUT_CAL_GAIN. READ_IIN = MFR_READ_IIN_PAGE0 + MFR_READ_IIN_PAGE1 This read-only command has two data bytes and is formatted in Linear_5s_11s format. MFR_READ_IIN The MFR_READ_IIN command is a paged reading of the input current that applies the paged MFR_IIN_OFFSET parameter. This calculation is similar to READ_IIN except the paged values are used. MFR_READ_IIN = MFR_IIN_OFFSET + (IOUT • DUTY_CYCLE) This command has 2 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 derived from the power inductor ∆ISNSn b) the 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 external sense element. This read-only command has two data bytes and is formatted in Linear_5s_11s format. |
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