help in building a DC UPS with automatic switchover using an IRF4905 Mosfet
DC UPS system designed to power a PC without interruption by using a 19V adapter as the main source and a LiFePO₄ battery as backup; the adapter both runs the PC and charges the battery (via a 14.2V CC/CV charger), while during a power cut a boost converter raises the battery voltage to 19V and a fast switching circuit built around an IRF4905 MOSFET instantly transfers the load, ensuring seamless operation with no reboot or data loss.
Features: Instant power switching (no reboot), silent operation (no relays), efficient LiFePO₄ battery backup, automatic charging with CC/CV control, stable 19V output via boost conversion, reverse current protection, compact DC-only design, and provision for a 12V output (via buck converter) for components like HDDs.
Added 1 day, 1 hour ago.
1 Answer
Hello Dipankar17
Thank you for sharing your DC UPS design requirements, it’s a very interesting and well thought out concept.
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It is an AI Copilot designed to help you design electronics at the speed of AI. Simply describe a circuit and get a production-ready schematic. It can also guide you through component selection and overall design considerations.
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If you have any questions about Copilot or need CAD models for your design, feel free to reach out, we’ll be happy to assist.
Best Regards
Amina
Answered 23 hours, 15 minutes ago.
