UC2825: Setting the frequency value of UC2825

takahiko yokota

Mastermind 7135 points

Part Number: UC2825

My customer will set the Freq=130kHz(Rt=7.5kHz, Ct=2200pF).

Please let me confrim the attached figure just to be sure.

①

Is this the range of Rt?

②,③

Could you tell these value(②=5kΩ, ③=500Hz)?

UC2825.pdf

Best regards,

Yokota

over 7 years ago

0 Frank TANG over 7 years ago

TI__Intellectual 1390 points

Hi Yokota,
Sorry, I cannot see the figure you attached.

Best Regards
Frank

0 takahiko yokota over 7 years ago in reply to Frank TANG

Mastermind 7135 points

Hi Frank-san

I'm sorry I attached document once again.

UC2825.pptx

Best regards,

Yokota

0 takahiko yokota over 7 years ago in reply to takahiko yokota

Mastermind 7135 points

Hi Frank-san

I'm sorry but please let me ask you further questions.

Is there the formula of to calculate the switching frequency?

Best regards,

Yokota

0 takahiko yokota over 7 years ago in reply to takahiko yokota

Mastermind 7135 points

I'm sorry to be pressing, but could I get the answer of these questions?

Best regards,

Yokota

0 Frank TANG over 7 years ago in reply to takahiko yokota

TI__Intellectual 1390 points

Hi Yokota-san,
There is no equation to calculate the switching frequency, but you can refer to the RT Vs Freq figure on the page 6 in the datasheet to choose RT and CT to get expected switching frequency.

Best Regards
Frank

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UC2825: Setting the frequency value of UC2825