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Topics - P.C.S.

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General Mach Discussion / Mach 3 Charge pump circuit layout, problem
« on: August 12, 2010, 10:02:42 AM »
Hi guys,

my name is Phil and I'm working on a PCB for the mach3 charge pump circuit following the circuit by Mariss Freimanis in the support download area.


I attached a picture of my layout for the circuit no. 2. It only switches my relays properly, when the voltage connected to +5V DC is lowered to about 4V DC.
The only modification I made is a IRF1404 mosfet. IC pin connections like in the datasheet of the HEF4538.

I could install a +4V voltage regulator, but this does not solve the basic problem with the circuit. I would appreciate any help or advice very much.

Thanks in advance.
Phil


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