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BradTheRad,
Thanks for the detailed options. As is too often the case, I may be misunderstanding your understanding of how little space is in the 'Tiny SA' spectrum analyzer? Even with the battery removed the total available size is 6.69" X 4.72" X 2.56". The maximum available space is less...
Sorry about the delay in my reply! First. no battery is involved. The ultra miniaturized spectrum analyzer can be powered via it's Li battery or via USB connector. Since the BMS (battery management system) became inoperative the battery cannot be charged and it also served as a 5 V regulator -...
BradTheRad,
THANKS for your prompt reply. Sorry if my info was not clear - sufficient. The BMS reduces the supply (5 V) to 4.2 V at a maximum current draw just over 1 A (depending on function chosen i.e. the SA's power bus is supposed to be 'hefty' enough to power an LNB/line amp) if needed...
Have a SA (spectrum analyzer) powered via 5 V USB supply. Battery management IC hosed, NOT available. Product is certified - tested up to 4.2 V @ 1 A.
What is the best option?
Use a 1A # _____________ diode (forward voltage drop)?
Use a 1A 4V - 4.2V Zener diode?
Or ...
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