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LTM4686B Datasheet(PDF) 92 Page - Analog Devices |
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LTM4686B Datasheet(HTML) 92 Page - Analog Devices |
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92 / 132 page  LTM4683 92 Rev. 0 For more information www.analog.com PMBus COMMAND DETAILS VIN_UV_WARN_LIMIT The VIN_UV_WARN_LIMIT command sets the value of input voltage measured by the ADC that causes an input under- voltage warning. This warning is disabled until the input exceeds the input startup threshold value set by the VIN_ON command and the unit has been enabled. If the VIN voltage drops below the VIN_UV_WARN_LIMIT, the device: • Sets the INPUT Bit Is the STATUS_WORD • Sets the VIN Undervoltage Warning Bit in the STATUS_INPUT Command • Notifies the Host by Asserting ALERT, unless Masked VIN_ON The VIN_ON command sets the input voltage, in volts, at which the unit starts power conversion. This command has two data bytes and is formatted in Linear_5s_11s format. VIN_OFF The VIN_OFF command sets the input voltage, in volts, at which the unit stops power conversion. This command has two data bytes and is formatted in Linear_5s_11s format. MFR_ICHIP_CAL_GAIN The MFR_ICHIP_CAL_GAIN command is used to set the resistance value of the VIN pin filter element in milliohms. (See also READ_VIN). Set MFR_RVIN equal to 0 if no filter element is used. This command has two data bytes and is formatted in Linear_5s_11s format. Output Voltage and Limits COMMAND NAME CMD CODE DESCRIPTION TYPE PAGED DATA FORMAT UNITS NVM DEFAULT VALUE VOUT_MODE 0x20 Output voltage format and exponent (2–12) R Byte Y Reg 2–12 0x14 VOUT_MAX 0x24 The upper limit on the output voltage the unit can command regardless of any other commands. R/W Word Y L16 V Y 1.1V 0x119A VOUT_OV_FAULT_LIMIT 0x40 Output overvoltage fault limit R/W Word Y L16 V Y 0.55V 0x08CD VOUT_OV_WARN_LIMIT 0x42 Output overvoltage warning limit R/W Word Y L16 V Y 0.538 0x089A VOUT_MARGIN_HIGH 0x25 Margin high output voltage set point. It must be greater than VOUT_COMMAND. R/W Word Y L16 V Y 0.525 0x0866 VOUT_COMMAND 0x21 Nominal output voltage set point R/W Word Y L16 V Y 0.5 0x0800 VOUT_MARGIN_LOW 0x26 Margin low output voltage set point. It must be less than VOUT_COMMAND. R/W Word Y L16 V Y 0.475 0x079A VOUT_UV_WARN_LIMIT 0x43 Output undervoltage warning limit R/W Word Y L16 V Y 0.462 0x0766 VOUT_UV_FAULT_LIMIT 0x44 Output undervoltage fault limit R/W Word Y L16 V Y 0.45 0x0733 MFR_VOUT_MAX 0xA5 Maximum allowed output voltage R Word Y L16 V 2.75 0x2C00 |
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