[Oap-discuss] TI Powertrends 78ST105HC Replacement

[Scott C. <rob...@gm...>]

Hi Dafydd,

Thanks for the feedback on the schematic updates.

I've added another i2c connector the HCM to support the TPA81.
http://www.openautomaton.org/index.php/HCM

I'm working on the TI Powetrends replacement schematic and PCB layout.
Replacing these surface mounted components with through-hole equivalents
will increase the PCB sizes, and drive up the component cost a few
dollars.  While the LM2592HV costs less than the TI Powertrends, it means
that the designer must supply a heatsink, inductor, and schottky diode.

What do you think about reducing the number of DC-DC regulators in the
design?  The TI powetrends is used on the PMM, HCM, and SAM.

Could a single DC-DC PCB be used to power the PMM PIC, and supply the 5V
LCD display, HCM, and SAM?

Thanks,
--scott c.