Resources
Energy budget calculator
The viability condition from the datasheet, made operable: energy available per cycle must be at least the energy consumed per cycle plus a safety margin, where consumption is sleep plus measurement, processing and transmission. Put your load in and see whether it closes.
Your load
Start from a preset, then change what differs.
- Average load power
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- Duty cycle
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- Energy headroom
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- Fastest sustainable cycle
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- Capacitor for the burst
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- Li cell for 7 days with no field
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First-order energy budget. It accounts for the active burst, the sleep floor and the device's own 500 nA quiescent draw, and sizes the capacitor from ½C(V²−V²) between the storage top and VDC_OUT + 0.3 V of headroom. It does not model temperature, storage ageing, self-discharge, converter behaviour near cold start, or the field actually present at your installation — measure that. It is a screening tool, not a substitute for validation in the real environment.