The UC control IC provides all of the necessary fea- tures to implement fixed frequency, current mode control schemes while maintaining a minimum. Buck, Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull Regulator Positive Output Step-Up, Step-Down, Step-Up/Step-Down DC-DC. The UCN is a Current Mode PWM Controller that provides all of the necessary features to implement fixed frequency, current mode control schemes while.

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And I want to askdoes UC adjust the duty ratio by adjusting the setting voltage of the feet 5?

In reply to Benjamin Lough:. But I still have two doubts about it. Nov 15, 1: If it is not controlled by feet 5by which parameter adjusting?

In reply to Jenny Lu But currently I found that Uc346n has a frame-throwing phenomenon at work. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right.


Nov 7, 8: This device uses current mode control and relies on sensing the primary side current. When the open-loop occasion, the duty ratio can not be adjusted by feet uc38446n. RS Components Statement of conformity.

Hi Jenny, Thank you ucc3846n your interest in UC The product does not contain any of the restricted substances in concentrations and applications banned by the Directive, and for components, the product is capable of being worked on at the higher temperatures required by lead—free soldering The restricted substances and maximum allowed concentrations in the homogenous uc8346n are, by weight: Price Each In a Tube of Nov 8, 6: Menu Search through millions of questions and answers User.

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.

UC3846: Duty ratio of PWM to UC3846

COO Country of Origin: I an confusing how to resolve it? Hi Ben Lough, Thanks for your help. For UCwhat is the maximum value of duty ratio can be reached? No license, either express or implied, by estoppel or otherwise, is granted by TI. Trademarks Privacy Policy Terms of Use. Content on this site may contain or be subject to specific guidelines or limitations on use.


Could you provide some details?

Are you seeing this after adding the sense resistor? Hi Jenny, I am not quite sure what is meant by frame-throwing phenomenon. The isolated-flyback power supply controller provides Constant-Voltage CV and Constant-Current CC output regulation to improve transient response to large load steps.

In reply to Benjamin Lough: The product detailed below complies with the specifications published by RS Components. Use of the information on this site may require a license from a third party, or a license from TI.

TI is a global semiconductor design and manufacturing company. This thread has been locked. The newly created question will be automatically linked to this question. You can calculate the dead time from equation 2 on page 12 of the datasheet: Nov 7, 1: I would suggest adding a current sense resistor such as what is shown on page 11 of the datasheet: Go to Support forums.

We are glad that we were able to resolve this issue, and will now proceed to close this thread. Nov uc3846m, 1: