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bcjames wrote:
I want to build a 5 Volt power suppply to run my PDA in my glider from the 12 volt battery. Sometimes I use a 14 volt battery too, so it needs some input voltage range. I'm looking for suggestions and a DigiKey part number for a suitable 1 amp DC/DC integrated power supply chip. I'd like: at least 80% efficient no radio noise Vin of 10.5 to 16.5 volts Vout 5 volts 1 amp low cost I've looked at the LM2825 and the LTC1174-5, but I'd like to hear from anyone who's done this. Thanks Check out Maxim, they tend to be very helpful with samples. They also have parts with ring damping circuitry which would help with the radiated noise. Another option is to download LTSpice ( http://www.linear.com/software/ ). That software has a switcher designer wizzard, you enter your parameters and it spits out a circuit you can simulate. Depending on your experience and amount of effort you want to spend, it may be worthwile to look into DC-DC converter modules. Kind regards, Iwo |
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