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Design >> Analog Design >> Boost Converter/ Frequency Response/ Compensation
https://designers-guide.org/forum/YaBB.pl?num=1525068913

Message started by reann on Apr 29^th, 2018, 11:15pm

Title: Boost Converter/ Frequency Response/ Compensation
Post by reann on Apr 29^th, 2018, 11:15pm

Good day everyone! I just would like to ask few questions.

I am currently working on boost converter with the following specifications:

Vin=1.2V
Vout=2.5V
Iload=130mA (Rload=19.3 ohm)
switching frequency=500kHz
in a TSMC65nm technology environment.

As per calculation values of my inductor and capacitor with the condition to operate in CCM mode are the following:

L=657uH but used L_final=900uH to make sure operate in CCM mode
C=19nF but used 3uF to make a sure ripple=1%

But having confusion as I have tested and simulated my RLC which is attached herewith.

Testing results and simulation results depict a gain of -58.5dB to compensation.

My questions are:

1. Is this gain to be compensated realistic? Is it a bit large
2. If this is realistic can you suggest what type of compensation is suitable for this?
Btw, I have already design a miller OTA with an gain 70.2dB, pgase>50 deg and a UGB=10MHz

that's all, thank you.

Best regard,

reann

Title: Re: Boost Converter/ Frequency Response/ Compensation
Post by reann on Apr 29^th, 2018, 11:16pm

Btw here is the bode plot of the RLC circuit: