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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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LTM4676A Arkusz danych(PDF) 91 Page - Linear Technology |
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LTM4676A Arkusz danych(HTML) 91 Page - Linear Technology |
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91 / 136 page  LTM4676A 91 4676afa For more information www.linear.com/LTM4676A appenDix c: pMbus coMManD DeTails PWM CONFIG COMMAND NAME CMD CODE DESCRIPTION TYPE PAGED DATA FORMAT UNITS NVM DEFAULT VALUE MFR_PWM_MODE 0xD4 Configuration for the PWM engine of each channel. R/W Byte Y Reg Y 0xC1 MFR_PWM_CONFIG 0xF5 Set numerous parameters for the DC/DC controller including phasing. R/W Byte N Reg Y 0x10 FREQUENCY_SWITCH 0x33 Switching frequency of the controller. R/W Word N L11 kHz Y 500 0xFBE8 MFR_PWM_MODE The MFR_PWM_MODE command allows the user to program the PWM controller to use, discontinuous (pulse-skipping mode), or forced continuous conduction mode. BIT MEANING 7 Range of ILIMIT 0 – Low Current Range 1 – High Current Range 6 Enable Servo Mode 5 Reserved 4 Page 0 Only: Use of TSNS1a-Sensed Temperature Telemetry 0 - Temperature sensed via TSNS1a is used to temperature-correct the current-sense information digitized by Channel 1's current sense input, ISNS1a+/ISNS1a–. 1 - Temperature sensed via TSNS0a is used to temperature-correct the current-sense information digitized by Channel 1's current sense input, ISNS1a+/ISNS1a–. Telemetry obtained from the thermal sensor connected to TSNS1a can be external to the module, if desired. 3 Reserved 2 Reserved 1 Voltage Range 0 - Hi Voltage Range 5.5 volts max 1 - Lo Voltage Range 2.75 volts max 0 PWM Mode 0 - Discontinuous Mode 1 - Continuous Mode Whenever the channel is ramping on, the PWM mode will be discontinuous, regardless of the value of this command. Bit [7] of this command determines if the part is in high range or low range of the IOUT_OC_FAULT_LIMIT command. Changing this bit value changes the PWM loop gain and compensation. Changing this bit value whenever an output is active may have detrimental system results. Bit [6] The LTM4676A will not servo while the part is OFF, ramping on or ramping off. When set to a one, the output servo is enabled. The output set point DAC will be slowly adjusted to minimize the difference between the READ_VOUT_ADC and the VOUT_COMMAND (or the appropriate margined value). Bit [1] of this command determines if the part is in high range or low voltage range. Changing this bit value changes the PWM loop gain and compensation. This bit value cannot be changed when an output is active. This command has one data byte. |
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