24V to 50 Volt converter circuit

[waqas5304]

hi
i want to convert 24 V dc to 50 V dc , any idea to do it

 

[FvM]

Could be a standard boost switching application, e. g. with an UC384x current mode controller, a MOSFET, a diode, an inductor ... Solution depends on current requirements.

 

[saeed131]

hi

 

[FvM]

saeed131, should we use a Power OP when more than 20 mA current is required?

 

[waqas5304]

thanx saeed131
plz tell me how to give power supply to opamp. if u can suggest the opamp it will be great . i think your circuit in thoeritical not pratical

 

[melc]

hi
i want to convert 24 V dc to 50 V dc , any idea to do it

If you need small current (ie 100-200mA) then a simple oscillator driving a NPN (NMOS) power transistor ( 200V Vce/Vds). In the transistor's collector an inductance connected to +24V. On the collector you'll have 2..3 times the supply voltage. Rectify it using a fast diode (kill the oposite spikes with another diode) and filter with a capacitor. Voilla.

 

[FvM]

On the collector you'll have 2..3 times the supply voltage.

Could be a lot more. Without a load, the voltage will rise until either transistor or diode reach avalanche breakdown. Depending on the current level, they may possibly not withstand this operation. Thus if no pwm voltage regulation is provided, you should have at least a zener diode limiting the output voltage. Basically the part count wouldn't be higher using a SMPS controller as oscillator, e. g. they said type, but you have a precise voltage regulation then.