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LTM4673 Datasheet(PDF) 91 Page - Analog Devices |
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LTM4673 Datasheet(HTML) 91 Page - Analog Devices |
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91 / 132 page  LTM4683 91 Rev. 0 For more information www.analog.com FREQUENCY_SWITCH The FREQUENCY_SWITCH command sets the switching frequency, in kHz, of the LTM4683. Supported Frequencies VALUE [15:0] RESULTING FREQUENCY (TYP) (kHz) 0x0000 External Oscillator 0xF3E8 250 0xFABC 350 0xFB52 425 0xFBE8 500 0x023F 575 0x028A 650 0x02EE 750 0x03E8 1000 The part must be in the Off state to process this command. The RUN pin must be low, or both channels must be com- manded off. If the part is in the RUN state and this command is written, the command will be NACK’d and a BUSY fault will be asserted. When the part is commanded off, and the frequency is changed, a PLL_UNLOCK status may be detected as the PLL locks onto the new frequency. This command has two data bytes and is formatted in Linear_5s_11s format. VOLTAGE Input Voltage and Limits COMMAND NAME CMD CODE DESCRIPTION TYPE PAGED DATA FORMAT UNITS NVM DEFAULT VALUE VIN_OV_FAULT_LIMIT 0x55 Input supply overvoltage fault limit. R/W Word N L11 V Y 15.5 0xD3E0 VIN_UV_WARN_LIMIT 0x58 Input supply undervoltage warning limit. R/W Word N L11 V Y 4.65 0xCA54 VIN_ON 0x35 Input voltage at which the unit should start power conversion. R/W Word N L11 V Y 4.75 0xCA60 VIN_OFF 0x36 Input voltage at which the unit should stop power conversion. R/W Word N L11 V Y 4.50 0xCA40 MFR_ICHIP_CAL_GAIN 0xF7 The resistance value of the VIN pin filter element in milliohms R/W Word N L11 mΩ Y 1000 0x03E8 VIN_OV_FAULT_LIMIT The VIN_OV_FAULT_LIMIT command sets the value of the input voltage measured by the ADC, in volts, that causes an input overvoltage fault. This command has two data bytes in Linear_5s_11s format. PMBus COMMAND DETAILS |
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