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Recent content by willi65

  1. W

    Help me convert this code for MikroC Compiler

    Re: Help code convert Hi mean u have to change the code to micrchip compiler .and change the controller..may u change to PIC 18F4680 or eq..u done the PCB already... u cna send me more details to williossmann@web.de thanks
  2. W

    pic 18f4550 - LCD - c18

    Hi u must attaced .. Stdio.h . were the settings for the datalines D4-D7? send ur project files with the C code to williossmann@web.de i can check it
  3. W

    12v 5ah Lead Acid Battery Charging

    Hi ur charger need an current limiter.. mean I -const ...the low cost powersupply doesnt have an limiter for 1A ..the range can be 1,0 - 1,5 A....If ur Battery low..mean about 10V ..and u connect the charger can be the chare current are 1,5A therfore the Powersupply getting hot ,because...
  4. W

    Help needed in DC-DC converter

    Hi.. i think the best are an push pull converter..u can use the SG3524..the EMC good..
  5. W

    high current output step dc-dc converter..need help

    Hi the LTC3780 do the same..if u need i have an ready layout..only 2" * 2"
  6. W

    can i get a schematic of dc-dc buck converter of input 20V

    Re: can i get a schematic of dc-dc buck converter of input 2 Hi u check the webside of LT... LTC3731...can use as example
  7. W

    driver for two-transistor-forward-converter

    Hi... do u have any schematics of ur design? which power range u need.. Input Voltage Out Put voltage and Power?
  8. W

    Need source resistor for current mode forward converter?

    Hi... the LT1241 like the same as UC3842/44 ec.. this Controller are Currentmode controllers .. the Ramp are the current trough the Prim Winding of the Transformer...U sense the Output Voltage this are compare with the ramp.and the PWM switch of... U done the layout already? there are some for...
  9. W

    MC34063/33063 power supply problem

    Hi the MC34063 not easy to handle...how low u need ur peak of 1.5A? ur current normaly 300mA thsi are 500% more...mean u need 5times more Outputpower.. About the Indictor u cna caluculate the inductor L = (Uin-Uout) * Uout / 0,3 * 100*10^3 * 0,3A * Uin when u calulate it for ur two currents...
  10. W

    TRIAC blown out - possible reasons of overheating

    Hi do u have an schematic of ur application? Willi
  11. W

    Opamp with CMIR down to 0V

    Hi LM358 Willi
  12. W

    12 volt to 300 voltDC/DC converter

    Re: DC/DC converter hi i think u need full bridge.. 100A not litle current..and u not need an storage choke..(calculate onle the los in the choke .if u use an step down!!! why u want use an PIC microcontroller??? TI have many PWMs...if u want using an uC u need an dsPIC...only the...
  13. W

    Representative / Distributor wanted in Europe

    Hi sorry i can't open ur webside..pls can u send me more details to: williossmann (at) web (dot) de thanks Willi
  14. W

    On chip Buck Boost DC2DC -transistor realibility issue

    Hi did u have any schematic of ur Design? i can u help when i see the drawing..wich PWM u take? normaly when u have low input voltage u have using an booster for the supply voltage for the PWM Controller..,and better use LL Mosfet.. Willi Added after 8 minutes: Hi u can look the...
  15. W

    Air gap in SMPS tranformer

    ferrite air gap Hi u dont need an Air Gap ,when u using an Forward or push pull design..But u can checked it at the Switching Trace of the MOSFet or ec.Mostly if u put litle AIR GAP in the transformer the Temp of the Transformer get cooler..for example for an ETD core about 0.02mm.. Willi
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