The UTC UC control IC offers all necessary features for accomplishment of fixed frequency, current mode control functions, however it contains the least. UC/7. SLUSA – JANUARY – REVISED MARCH •. Automatic Feed Forward Compensation. •. Programmable Pulse-by-Pulse Current. UC Current Mode PWM Controller. FEATURES. DESCRIPTION. The UC/7 family of control ICs provides all of the necessary features to implement.
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Ask a related question What is a related question? If it is not controlled by feet 5by which parameter adjusting?
Are you seeing this after adding the sense resistor?
This thread has been locked. Content on this site may contain or be subject to specific guidelines or limitations on use. This device uses current mode control and relies on sensing the primary side current. The newly created question will be automatically linked to this question.
Mentions Tags More Cancel. Nov 15, 7: In reply to Benjamin Lough:.
UC3846: Duty ratio of PWM to UC3846
When the open-loop occasion, the duty ratio can not be adjusted by feet 5. Ucc3846 you have a related question, please click the ” Ask a related question ” button in the top right corner. Nov 13, 6: HI Ben Lough, Thanks for your reply. Use of the information on this site may require a license from a third party, or a license from TI.
Could you provide some details? Nov 15, 1: Hi Jenny, I am not quite sure what is meant by frame-throwing phenomenon.
Thank you very much! Nov 8, 6: Duty cycle is determined by comparing the output of the error amplifier COMP pin and the ramp signal derived from the current sense pins. I add the uc33846 resistor, and now the duty ratio can be adjustable.
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Nov 13, 3: Nov 8, 1: You can calculate the dead time from equation 2 on page 12 of the datasheet: And I want to askdoes UC adjust the duty ratio by adjusting the setting voltage of yc3846 feet 5?
I an confusing how to resolve it?
We are glad that we were able to resolve this issue, and will now proceed to close this thread. All content and materials on this site are provided uc38466 is”. No license, either express or implied, by estoppel or otherwise, is granted by TI. Uc3486 deadtime is set by Capacitor Ct. Hi Jenny, Duty cycle is determined by comparing the output of the error amplifier COMP pin and the ramp signal derived from the current sense pins.
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I would suggest adding a current sense resistor such as what is shown on page 11 of the datasheet: Can you send me waveforms? Locked Cancel Do you have another question?
Best Regards, Ben Lough. In reply to Jenny Lu Hi Ben Lough, Thanks for u3c846 patience. Ask a new question Ask a new question Cancel. If you have further questions related to this thread, you may click “Ask a related question” below. If the dead time is set, but it changed itself, what causes it possibly? For UCwhat is the maximum value of duty ratio can be reached?