| ??? 06/13/11 13:24 Read: times |
#182629 - Gate divider Responding to: ???'s previous message |
Hello Michael,
Thanks for comment! I used resistor between Gate and Source , because FET conducted in "false" (reversal) battery's connection . It is possible i had to have some other mistake in that moment , but resistor helped. I think divider can be increased from 1:10 to 1:30 with no problems. Finally i realized that such "reverse" connection of FET is something as switch's connection in analog multiplexers (for example 74hc4053). Big difference are huge currents . Next days i'll try double circuit - one P-FET between battery and load, another P-FET from charger to load (and battery) - first FET prevents circuits and battery from battery reversal. Second FET should eliminate charger's consumption when no mains connected. Both P-FETS will be 'reverse' connected. First one should conduct in both directions, second one - only from charger to battery and load. I'm working on this because new power consumer (printer) is planned to relatively low-consumption load. regards |
| Topic | Author | Date |
| battery polarity reversal -protection | 01/01/70 00:00 | |
| Better Specifications Needed | 01/01/70 00:00 | |
| parts | 01/01/70 00:00 | |
| Circuit Behavior | 01/01/70 00:00 | |
| Parasitic diode | 01/01/70 00:00 | |
| diode is ok | 01/01/70 00:00 | |
| Why is diode OK? | 01/01/70 00:00 | |
| battery is shown in normal connection | 01/01/70 00:00 | |
| I use a similar circuit | 01/01/70 00:00 | |
| Threshold Note | 01/01/70 00:00 | |
| Gate divider | 01/01/70 00:00 | |
| Another thing to consider... | 01/01/70 00:00 | |
Gate network | 01/01/70 00:00 |