UC2842 PDF

UC/3/4/5. UC/3/4/5. October CURRENT MODE PWM ZED FOR OFF LINE AND DC TO DC. CONVERTERS. UC Switching Controllers are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for UC Switching Controllers. Texas Instruments UC Series Switching Controllers are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for Texas.

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However, the reality is cruel Ask a related question What is jc2842 related question? Do you have another question? 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 uc242 intellectual property right.

More detailed schematic as below for your check:. Hello Sulyn, It is an interesting problem; the AUX voltage is actually uc8242 little higher during short-circuit conditions than when normal. Mar 12, 7: Do you have something that can share with me, thanks a lot! Content on this site may contain or be subject to specific guidelines or limitations on use.

We are glad that we were able to resolve this issue, and will now proceed to close this thread. Hello Sulyn, I have a few thoughts about this, although not a definitive answer.

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Mar 10, 3: However the standby current will increase about 2W which can’t be accepted by customer. In reply to Ulrich Goerke:.

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I’ll try to respond as soon as I can. Trademarks Privacy Policy Terms of Use. Mar 10, 1: The newly created question will be automatically linked to this question. No license, either express or implied, by estoppel or otherwise, is granted by TI. This thread has been locked. Below are two uc2482 with normal hc2842 status and 5V output load shorted to GND: It seems to me that 2W is a lot of additional standby power that the R-C snubber alone wouldn’t account for.

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I suspect that the current sense R-C filter is delaying the peak signal too long and allowing a high primary peak current during the short condition.

Best regards, Sulyn Zhang.

If you have further questions related to this thread, you may click “Ask a related question” below. If so, that is what customer wanted! If you have a related question, please click the ” Ask a related question ” button in the top right corner. In reply to Ulrich Goerke: Use of the information on this site may require a license from a third party, or a license from TI. This can allow a smaller R-C snubber to be used at AUX to dampen the remaining ringing and reduce standby power.

Meanwhile, since this is an industry-wide ucc2842, I invite other viewers, inside and outside of TI, who may already have a solution to kc2842 their advice on this matter. Regards, Ulrich Locked Cancel Do you have another question? Please consider this investigation as another option to solve the main problem to achieve hiccup mode. More detailed schematic as below for your check: I do not have an immediate answer, but I will think about this and discuss it with colleagues.

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ST Microelectronics – datasheet pdf

Maybe that will snub the excess ringing, but D2 will block any drop on the Vaux rail and T1 will stay off. So based on above information and description, can you or anyone give a available solution to realize Hiccup mode with our UC? Your customer can test this idea 2 ways: Mar 10, 8: All content and materials on this site are provided “as is”.

BTW, not sure how other customer realize the protection feature? This seems to be a long on-time for a protection condition. From high voltage, this might account for the extra power. All postings and use of the content on this site are subject to the Terms of Use of the site; third parties using this content agree to abide by any limitations or guidelines and to comply with the Terms of Use of this site.

If this filter can be made smaller, the Ipk will be lower and maybe the leakage inductance ringing will be smaller, too. Ask a related question Ask a new question. Hi Ulrich, Thanks a lot for your support, I will let Customer try this idea and feedback to you.