Regarding Boost Voltage regulator

[coolstuff07]

boost voltage regulator

Hello,

Please help me in finding output voltage of boost regulator.

Input is 2.5V
L=22UH
Load capacitor=22UF
operating frequency=1M
duty cycle=92%.

I studied that output voltage of boost regulator depends on duty cycle then i should get 31.25 output voltage but iam seeing 7.65V output voltage in results.

Please help me.

Bye.

 

[LordAli]

boosting voltage regulator

It's not sufficient amount of information.

See ... at the page 6. Equation VO = Vi/(1-D)
https://focus.ti.com/lit/an/slva061/slva061.pdf

It assumes Vds, Vd and RL are small enough to ignore them. Second thing is the inductor design (core material etc.)

 

[coolstuff07]

boost regulator forum

Hi,

With the above formula i should get 31.25V because D=0.92 and input=2.5.
But in simulation iam getting 7.65V.

Please help.

Bye.