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LTM4677 Datasheet(PDF) 72 Page - Analog Devices |
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LTM4677 Datasheet(HTML) 72 Page - Analog Devices |
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72 / 116 page  LTC3883/LTC3883-1 72 Rev. F For more information www.analog.com PMBus COMMAND DETAILS FREQUENCY_SWITCH The FREQUENCY_SWITCH command sets the switching frequency, in kHz, of a PMBus device. 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 the part must be commanded off. If the part is in the RUN state and this command is written, the command will be ignored 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 DATA FORMAT UNITS NVM DEFAULT VALUE VIN_OV_FAULT_ LIMIT 0x55 Input supply overvoltage fault limit. R/W Word L11 V Y 15.5 0xD3E0 VIN_UV_WARN_LIMIT 0x58 Input supply undervoltage warning limit. R/W Word L11 V Y 6.3 0xCB26 VIN_ON 0x35 Input voltage at which the unit should start power conversion. R/W Word L11 V Y 6.5 0xCB40 VIN_OFF 0x36 Input voltage at which the unit should stop power conversion. R/W Word L11 V Y 6.0 0xCB00 MFR_RVIN 0xF7 The resistance value of the VIN pin filter element in milliohms R/W Word L11 mΩ Y 3000 0x12EE VIN_OV_FAULT_LIMIT The VIN_OV_FAULT_LIMIT command sets the value of the measured input voltage, in volts, that causes an input overvoltage fault. The fault is detected with the A/D converter resulting in latency up to 80ms. This command has two data bytes and is formatted in Linear_5s_11s format. VIN_UV_WARN_LIMIT The VIN_UV_WARN_LIMIT command sets the value of the input voltage that causes an input undervoltage warning. The warning is detected with the A/D converter resulting in latency up to 80ms. This command has two data bytes and is formatted in Linear_5s_11s format. |
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