LOW VOLTAGE POWER SUPPLY

Molly, Gwyn, Sam, and Eric

Answers from Keith

SRIB= sounding rocket interface board, which Keith is making

PEM= polarimeter electronics box (3 outputs)

A=analog, D=digital for outputs (not AC/DC!)

Isolated DC-DC converters are the best option, since linear regulators dissipate power as heat

The PCB should be about 6”x12” or smaller

Copper heat sinks work well in space due to conduction

More Questions for Keith

Should ground for everything be chassis ground, or will isolated regulator outputs have floating ground?

Have you decided on 3-line serial vs. I2C? Should all components specifically say “isolated?” We

chose them as if they did. What is the factor of safety for currents? Can we use an op amp buffer for the DAC output rather

than using variable regulators? Non-linear isolated variable regulators with enough current are hard to find.

How important are rippling tolerances? What are your priorities as far as trade-offs go with

components? (List of part numbers we want to run by him)

Part for +6V,-6V

Other Parts from Murata

Pert Chart