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LTC2977 Datasheet(PDF) 98 Page - Analog Devices |
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LTC2977 Datasheet(HTML) 98 Page - Analog Devices |
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98 / 138 page  LTM4664A 98 Rev. 0 For more information www.analog.com FREQUENCY_SWITCH The FREQUENCY_SWITCH command sets the switching frequency, in kHz, of the LTM4664A. Supported Frequencies: VALUE [15:0] RESULTING FREQUENCY (TYP) 0x0000 External Oscillator 0xF3E8 250kHz 0xFABC 350kHz 0xFB52 425kHz 0xFBE8 500kHz 0x023F 575kHz 0x028A 650kHz 0x02EE 750kHz 0x03E8 1000kHz The part must be in the OFF state to process this command. The RUN pin must be low or both channels must be commanded 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 0xCA53 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 4.5 0xCA40 MFR_RVIN The resistance value of the VIN pin filter element in milliohms set at factory. R Word N L11 mΩ N 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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