33V from 12V Converter

[aslan_korhan]

33V from 12V Converter

[telfo2007]

Hi friend

What you need is a DC-DC upconverter. Try with some examples from Maxim IC's portfolio. They have a huge amount and perhaps you can get some sample from them.

I hope this help you.
Bye.

[Parmin]

33V from 12V Converter

Great, so what is the question or the informations that you want to post?
you want to make one?
you have make one and wnat to share the technique?
you want to start a discussion about one?

hmm..

[mris99]

You should also check National ICs.
Here you find a selector guide:
http://www.national.com/appinfo/power/webench.html
You enter your requiroments and the tool recommend you some of
the IC palette.

[akutisarizar]

Hi friend,

I dont know how much current are you require but if you need less current you need tv schematics to find how can u convert 33V from 12V . All tuner needs supplied by 33V most tv designer use circuit for as u need . If you can not find any tv schematic please feel free to contact with me .

Best Regards,

[AnyAlex]

33V from 12V Converter

U out is > U in. Out max 35 V. C4=100nf. C5 & C6 is 470 mkf, U out is with Stab D2. I out max 15 A.
When R5=0.12 om then Out max=5 A. U in 7 V min and 15 V max. D1 Shottki-Diod.
PS. Shematic from Elektor.
Sample with out 15 V:

[visn]

The usual use for 33V is for feeding a varactor for a VCO. When the voltage has spikes like this ( not a smooth dc signal) , how does it affects vco frequency? I have seen two other designs that use dc-dc to boost the voltage, and the philips 1216 tv tuner app note says that it has an integral 5v-to-33v convertor.

It may be millivolts ( the ripple) , but what does it do to the system in a pll synthesizer? Is this totally OT?

[chithanh04dt2]

U out is > U in. Out max 35 V. C4=100nf. C5 & C6 is 470 mkf, U out is with Stab D2. I out max 15 A.
When R5=0.12 om then Out max=5 A. U in 7 V min and 15 V max. D1 Shottki-Diod.
PS. Shematic from Elektor.
Sample with out 15 V:

can you give for me your *.DNS (simulation with Proteus)

[AnyAlex]

can you give for me your *.DNS (simulation with Proteus)

Removed. Lib for NE555-SA:
PS. When U out >20 V then R1=12 k.

[neelandan]

Here is a simple design using discrete components (would require tweaking the component values for the required 33 volt output).
http://www.romanblack.com/smps/conv.htm

[chen]

if your 12V supply is of high current capacity and ur 33V application requires less current (approx 1/3 of 12V current) then u may try voltage tripler. its simple to contruct. it will give u around 36V. you will have to drop 3V using a zener or series res. depending on your current.

chen......

[vayupak_01]

step up converter

Boost topology dc-dc power supply that you choose

[phophollety]

You can try the MC34063 on the Datasheet there is from done circuits (current inverter, buck and boost) and also the equations to design your on easily..

[mhtplsh]

http://sound.westhost.com/project89.htm
This is a project for car audio.
But u can modify it as required.
There is full details about circuit, Hence easy to customise it.

[chithanh04dt2]

Removed. Lib for NE555-SA:
PS. When U out >20 V then R1=12 k.

Thanks and you can give me file you simulation

[AnyAlex]

...you can give me file you simulation

Dear chithanh04dt2!
A new korrected Simulation 12 V to 33 V with DSN and Libs is belov.
I can't Symulate more than 1.25 A (use real FET Transistor). R4 ist 0.12 ohm (max 5 A).
Symulation with Proteus 7.2 SP2, Double Core CPU 2x2.4 ggc, 2 gg RAM (8 month old),
Animated Circuit Configuration/ Spice Option/ Interactive Symulation Options/ Transient
Number of Steps = 10, Frame per second 16.
AnyAlex.
PS. Ne555-SA is a Standart 555 with korrected Shematic.

[irvinos]

Try MC34063A.
This is a usefull page for designers.
http://www.nomad.ee/micros/mc34063a/index.shtml

Posted on: January 27, 2008, 10:42:57 22:42 - Automerged
Try MC34063A.
This is a usefull page for designers.
http://www.nomad.ee/micros/mc34063a/index.shtml