Paul Fertser <[email protected]> writes: > Aaron Carroll <[email protected]> writes: >> To determine backlight power, I've got a DAQ sampling the >> voltage drop across R1763 (Rsense for the PCF50663 LED >> supply) which gives me the current, and I'm sampling LED+ >> at C1764 for the input voltage. I was hoping the product >> of these two would yield the power consumed by the >> backlight and Rsense. > ... > > You've got quite puzzling and unexpected results indeed. Could you > please provide us with the actual measurements data?
OTOH 66.6% efficiency for a boost converter doesn't sound like something really exceptionally low. And moreover we lack the datasheet for L1704 to be able to give proper estimates. -- Be free, use free (http://www.gnu.org/philosophy/free-sw.html) software! mailto:[email protected] _______________________________________________ hardware mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/hardware
