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MP8796B Datasheet(PDF) 35 Page - Monolithic Power Systems |
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MP8796B Datasheet(HTML) 35 Page - Monolithic Power Systems |
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35 / 52 page  MP8796B – 16V, 30A, SYNCHRONOUS STEP-DOWN CONVERTER WITH PMBUS MP8796B Rev. 1.0 www.MonolithicPower.com 35 1/19/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. VOUT_MODE (20h) The VOUT_MODE command reads and sets the output voltage. The 3 MSBs are used to determine the data format (only direct format is supported in the MP8796B), and the other 5 bits represent the exponent used in the output voltage read/write commands. The default value of 20h is 0x40. VOUT_COMMAND (21h) VOUT_COMMAND sets the output voltage of the MP8796B. Together, VOUT_COMMAND and VOUT_SCALE_ LOOP determine the feedback reference voltage: VOUT_COMMAND x VOUT_SCALE_LOOP. See the Output Voltage Setting section on page 22 for details on setting the output voltage. Command VOUT_COMMAND Format Direct Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R R R R R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Function X 2mV/LSB Default Value 0 0 0 0 0 0 0 1 1 1 0 0 1 1 0 0 The value is unsigned, and 1LSB = 2mV. The default value of 21h is 0.92V, which is 0x01CC. VOUT_MAX (24h) The VOUT_MAX command sets an upper limit on the output voltage of the converter to enable the command, regardless of any other commands or combinations. The intent of this command is to provide a safeguard against an accidental setting of the output voltage to a possibly destructive level, not to be the primary output over-voltage protection. Command VOUT_MAX Format Direct Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R R R R R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Function x 2mV/LSB Default Value 0 0 0 0 0 0 1 0 0 0 1 0 0 1 1 0 If an attempt is made to program the output voltage above the limit set by this command, the device responds as follows: The commanded output voltage is set to VOUT_MAX The VOUT bit is set in STATUS_WORD The VOUT_MAX_MIN warning bit is set in the STATUS_VOUT register The device notifies the host The value is unsigned, and 1LSB = 2mV. The maximum value of VOUT_MAX is 5.5V, and the default value is 1.1V. Therefore, the default value of 24h is 0x0226. VOUT_MARGIN_HIGH (25h) The value is unsigned, and 1LSB = 2mV. The default value is 1.1V. Therefore, the default value of 25h is 0x0226. Command VOUT_MARGIN_HIGH Format Direct Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Access R R R R R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Function X X X X 2mV/LSB Default Value 0 0 0 0 0 0 1 0 0 0 1 0 0 1 1 0 |
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