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Old Dec 19, 2010, 04:24 AM
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Australia, QLD, Charters Towers
Joined Dec 2003
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A few technical points to share about the design;

1. The balancing input stage can handle 3~5A constant under normal conditions.
2. The switchjack stage will cope with with 5A and only dissipate 75mW of heat and drop 15mV of voltage.
3. The LEDs will only draw 3~5mA each and will only be active when the switch is activated.
4. The dual-output headers are bonded to the same power rails
5. The choice of the switch used to turn on/off the ESJ doesn't really matter as there's only a tiny amount of power passed through it.
6. The whole ESJ has an off-state current draw of only 1.5uA, to put that into perspective, each 1mAh capacity of the battery will last 4 weeks. The battery itself will self-discharge faster.
7. The ESJ5AD[V] will have a 470uF low ESR decoupling capacitor.
8. Total forward voltage drop will range from 0.3~0.5V (this is mostly from the drop across the schoktty balancing diodes).
9. Reverse polarity protection.

Higher average currents can be achieved by placing small heatsinks on the balancing diodes.

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Last edited by PLD; Dec 30, 2010 at 10:41 PM.
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