Reducing Power Consumption |
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Written by Administrator |
Finally I started the project "The next generation". There is a long list of things I want to implement into the next generation beacon.
· Turn of the bias current generation of the driver, the DDS chip and the 30MHz master oscillator. (This keeps only the CPU unit running) · Turn off 48MHz CPU oscillator for normal operation and USB. Keep CPU running on internal RC oscillator. From there the CPU can enter
In addition I optimized current consumption of some units: · Reduce bias current of first driver stage as far as it keeps a reasonable frequency response in the range of 1MHz to 50MHz · Reduce losses in the 5V generation by replacing the LM7805 by a LCT1265 switch mode supply.
With a 230uA load on the 5V side the LTC1265 draws 290uA on the 12V side. This is a loss of less then 2,5mW and a total power consumption
Here is a gallery of the mods. I will keep info posted as I proceed with the implementation. 73
Gernot, OE1IFM
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