There is no output voltage on both channels, but there is voltage on the output of powerGood. Could this be a consequence of a forgotten resistor on the Rfreq pin?I don’t understand how PG can be, but there is no output voltage.
This RFB2 || RFB3 design has been my question.
If we need 1.5V output on Vout2, can we use two 30K for RFB2 and RFB3 ? we notice that the values in datasheet Table 1: 40.2K||24.3K = 15.1K, equal to two 30K in parallel. I think RFB2 and RFB3 could…
Does a model for the LTM4646 in parallel configuration exist for the LTPOWERCAD tool?
I am using three outputs in parallel and cannot get the appropriate response in my LTSPICE sims.
we use 10 pcs of LTM4646 and 10 pcs of LTM4622 on a big power system. System requires External Synchronization Clock (800KHZ) for all DC/DC.
Now ONLY ONE sync clock 800KHZ is generated from FPGA, and feed to 20 DC/DC in daisy-chain topology. The…
we newly import LTM4646, LTM4622 and LT3070 into our project for the frst time. To be careful, we would like to ask for asisting review. Insight of LT/ADI expert will be appreciated. .
SCH as PDF attached, and Load conditions are text-noted nearby…
We use LTM4646 for 3.3V/10A design. Estimated power dissipation on LTM4646 is about 4W. Two question.
(1) We noticed there is three thermal resistance parameter: θJCtop = 12.6°C/W, θJCbottom = 1.8°C/W, θJB = 2.3°C/W, What the difference of…
I'd like to confirm the number of Multiphase of LTM4646.
According to the data sheet page 11, Up to 6 phases can be cascaded to run simultaneously with respect to each other
by programming the PHASMD pin to different levels.
But on page 14…
we use LTM4646 and 4622 , for layout ,some questions to consult.
In both datasheets, it mentions that " Use a separated SGND ground copper area for components connected to signal pins. Connect the SGND to GND underneath the unit ".…
Thanks, Young, I would re-check this compensation RC network again.
By the way, if you have time, could you please help take a look at this question, it is about LTM4646 Vout2=1.5V and its feedback resistors value , This is the link, please see my latest…
For example, when we design 8-phase operation with four LTM4678 how to check the loop response by Frequency Response Analyzer?
What about 4-phase operation with two LTM4646?