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LM5041: Feedback loop Compensation |
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Part Number: LM5041 Hi Every one: I need to clarify LM5041 application circuit compensation design. Application circuit error opamp pole and zero placed below freq. Error op amp zero 1 placed by R35,C36 @ 1.326KHz Error op amp zero 2 placed by R32,C40 @ 22.9KHz Error op amp pole 1 placed by R42,C40 @96.7KHz Error op amp pole 2 placed by R35,C35 @279KHz My question 1) Op amp first zero placed in plant double pole L=60uH, Cout: 932uH F=673Hz? 2)Op amp second zero placed freq where should get? 3) I dint find Cout ESR value. Pole 1 placed in plant zero? I think Pole 2 placed almost in buck switching freq.LM5041..docx 3) How to compensate opto pole by error opamp in this application? 4)Kindly share any document available for compensation design for this application. (Opto coupler feedback with external opamp) 5) R11 and C11 form the opto pole? Kindly reply as soon as possible. Regards, Kubendran |
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Hellocompany Team, I am expecting your valuable reply. Regards, Kubendran |
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Hellocompany Team, We are facing loop compensation and buck switching node voltage oscillation issue with respect to LM 5041 application circuit design. Always i seen LM5041 related query response very delayed. Kindly reply previous query. Regards, Kubendran |
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Hi Kubendran, Sorry for the delay, the office that supports this controller was on public holiday, I have assigned an AE to this post. Regards Peter |
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Hi Peter, When will i expect the reply. Regards, Kubendran |
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Hellocompany team, No reply? Regards, Kubendran |
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Hi Kubendran, My mistake, there was a mistake in the email address for the AE in the system and this post did not appear on his list. I am checking if the AE assigned can support if not I will assign a new AE to help. I should have an update tomorrow. Regards Peter |
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Hi Kubendran, Unfortunate, I didn |
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Hi Sir, Please read carefully my previous query. What you are said error op amp R and C value corresponding pole and zero frequency already calculated. My question how you are placed compensator pole,zero and opto coupler pole to the plant response. If i consider plant is double pole that value not matched with actually what you are used in compensator pole and zero. Actually current mode plant having one pole and one zero. In this way also checked compensator value did not matched. Kindly look this one serious and give best solution.I am facing converter output oscillating issue. Regards, Kubendran |
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Hi Kubendaran, Did you made a measurement of the gain, phase or if you have done a load transient test and measured the response of the output voltage waveform to see if the response with well damped or under damped. I don |
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Hi Sir, I will share the waveform to your mail. Please reply. Regards, Kubendran. |
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