<html><head></head><body><div dir="auto">I took another look and i am pretty satisfied with the results ;). However, a few things still need attention (i wrote it down on <a href="http://t224.mjt.lu/lnk/AEAAHq9bWRkAAAAAAAAAAGbE2wkAASHlFNUAAAAAAAZHgABYquow53AL_eKiTEKLFD2cPfS26wAGAjk/1/8CS5JnYHwfGJh6YxzsKZ1g/aHR0cDovL3Job21idXMtdGVjaC5uZXQ">rhombus-tech.net</a>)<br><br></div>
<div dir="auto">Julius</div>
<div class="gmail_quote" >On Feb 20, 2017, at 09:54, Luke Kenneth Casson Leighton <<a href="mailto:lkcl@lkcl.net" target="_blank">lkcl@lkcl.net</a>> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div dir="ltr"><div class="gmail_extra">ok turns out - from what i am reading of the datasheets - that the bq24193 can cope with running from 3.3v, it looks like it doesn't mind: the limit of the I2C and other pins is 6V.</div><div class="gmail_extra"><br></div><div class="gmail_extra">the bq27542 is a different matter (i thought it was 1.8v, it's not: it's 2.5v). it has its own 2.5v LDO on-board but the maximum input voltage is 2.5v for its I2C and HDQ (status / IRQ pin). sooo what i've done is, connect the 2.5v output (REG25) to the level-shifter, and the other side to VREFTTL.</div><div class="gmail_extra"><br></div><div class="gmail_extra">i updated the schematics pdfs.</div><div class="gmail_extra"><br></div><div class="gmail_extra">l.</div></div>
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