Hello,
We are conducting power supply design using the MPM3698. Please provide the procedure for configuring the internal non-volatile memory of the MPM3698. We plan to use the MPM3698GBH-0000.
First, we will supply 12V to Vin to activate the internal 3.3V of the MPM3698. At this time, will the MPM3698GBH-0000 start in Low-Power Mode? If so, according to Figure 14 in the datasheet, it states that we can only write to the NVM after both EN1 and EN2 are raised. In that case, will Vout output the initial set output voltage from Vout? Or, if there are other timing options for writing, please let us know.
Hello Masahiro,
Welcome to the MPS Forums, thank you for patience as I understand this replay is delayed.
Most of our customers interface and program register settings onto the non-volatile memory using the Virtual Bench Pro 4.0 GUI. To properly interface with this GUI, please refer to the following procedure from the EVM3698 datasheet:
This is just a matter of adjusting the register settings on Virtual Bench Pro 4.0 and saving these settings to NVM on the top right corner of the GUI. In regards to the power mode for writing to MTP, here is what the datasheet says on this subject:
More details of the start-up sequence can be found on page 33 of the MPM3698 datasheet.
Seeing if your settings were saved to NVM can be checked by powering the IC off and seeing if the default settings that you saved power on by default.
Hope this provided some insight.
Best,
Krishan
Thank you for your response, Krishan.
I understand how to write to NVM using Virtual Bench Pro.
Could you please provide more information about the writing sequence?
Looking at pages 33 and 34 of the datasheet, it seems that the timing for enabling PMBus and writing to NVM in low-power mode occurs after the device’s EN pin is set to High (after t3 in Figure 14). Is my understanding correct?
Hello Masahiro,
Apologies for the incredibly late response. Yes, your understanding on the timing for the enabling of PMBus and writing to NVM based on your description here is correct.
Are there any updates in your design process?
