Thank you for your help, I was able to simulate the circuit in the PSpice tool. Also a tip for other engineers who may encounter a similar issue while simulating this circuit: I used the LM3481 Unencrypted PSpice Transient Model (Rev. D) from the following…
Part Number: LM3481 Other Parts Discussed in Thread: CSD17303Q5 Tool/software: The thread I want to comment to is locked, I hope this gets linked somehow.
I finally found a solution for the problem. It was the mosfet. When I tried it with the recommended…
Part Number: LM3481 Tool/software: Hello team,
Is there a specific condition that the device enter to pulse skipping mode?
For example, Isen pin detect the voltage and then does logic block control this?
The customer is using LM3481 with SEPIC topology…
Part Number: LM3481-Q1 Tool/software: Hi,
We made WEBENCH with the specifications that customers want.
6138.WBDesign86.pdf
The Rsense value is 2.46928 mOhm.
2.46928 mOhm is a custom specification, so I want to change it to a different value.
The value…
Hi Cho,
Thanks for clarification. The point when the device starts switching again depends only on the FB voltage. If Vout is regulated to 24V, the device will start switching again as soon as Vout drops below 24V.
Like mentioned before, it will then keeps…
Hi Tobias,
Thanks for the update. Unfortunately, I am not a full MOSFET expert, so I cannot give any specific component recommendations. However, the most crucial parameters to keep in check are Vds max voltage and Rds_on resistance, just as you already…
Part Number: LM3481 Other Parts Discussed in Thread: PMP10352 , , PMP Tool/software: Hi expert,
My customer used LM3481 and refer to the PMP10352 circuit for PoE 15W output application.
There is no problem to load 15W at output of LM3481 without main board…
Hi Zoe,
I received a mail request on this exact issue from your colleague Racheal. The response is summarized here:
Please note that the LM3481 has two protections for overcurrent events: - overcurrent protection (160mV threshold) - short-circuit protection…
Part Number: LM3481-Q1 Other Parts Discussed in Thread: LM3481 Hi team,
Below circuit is LM3481 external schematic. Customer feedback when 5Vout put drops down, the duty cycle remains the same.
CH1: RESET CH2: Vin CH3: DR CH4:5V out
CH1:Vgs CH2：Vr_s…
Part Number: LM3481-Q1 Hi Team,
Based on LM34xx How to Design Flyback Converter with LM3481 Boost Controller (Rev. A) (ti.com.cn) , my calculation of Lm is about 110uH as below.
VIN=32V Vout=12V. others are same as below.
However, in chapter 4, it says…
