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Hi. I recently got a design for a automation project created with the online designer based on a TNY290. I have made a prototype based on this design, and it works great with the a stable voltage output as per the design. However, I have been trying to get rid

HI Team, I am currently using TOP270EG IC for my current new design SMPS. I am facing startup issue. Unable get IC power on. Note : I am not used PI design given transformer spec , Instead of I used another one flyback (65Khz to )transformer which is used our

Hi, We have already tested the INN3164C-H10 in a Flyback design with the following specifications: 430V max. DC input voltage 5V/2A output n=10 (Npri/Nsec) - Transformer's turns ratio According to the datasheet's page 30, the maximum RMS working isolation voltage is 460Vrms and the creepage is 11.4mm. However, we need

Dear PI Team, since we're not having any luck getting acceptable results using a LYTSwitch-5 Circuit based on DER-515 and have determined the transformer to be the cause of all our issues, we wish to switch to a transformer-less circuit, but using the same driver (LYT5228D). I found the DER-596

Hi Team, We are developing an isolated flyback converter with a nominal input voltage of 24 VDC and an output of 18 VDC, delivering between 20 W to 30 W of power. In a related project, we have used the InnoSwitch3-EP family successfully. I initially considered using the same family for this design; however

Hello, I am currently working to resolve an issue that occurred while designing a PCB based on the DER-993 reference. Under the operating condition of 85Vac input and a 60W load, the output voltage, which should be 12V, is only reaching 10V, and then gradually rises to 12V after about

How do PID controllers work in motor control systems?

Hope everyone is doing well. I am actually designing a base board for the 2SC0115T and I am struggling with the clearance requirements. Actually I have some board constraints to cover clearance requirement. My question is: " Does the Conformal Coating affect the Clearance requirements? Like If I design it

Hi Power Integration Team, We want to develop a 48V, 0.5A isolated power supply using the INN3949CQ. Input voltage is Universal AC. Is it possible to develop up to 48V supply using IC INN3949CQ? Thanks & Regards Pemendra Pardhi

Hi there! I'm currently designing an AC/DC Flyback using the INN3164C-H10. I followed the design guidelines provided in AN72 and read the other related topics in this forum. However, I still don't understand how the controller is modulating the switching frequency. The main specifications I'm testing during this bring-up phase

Hi Everyone, I'm looking for suggestions on a driver IC that can deliver 100 mA constant current as an offline LED driver. My application is to build a non-isolated, low-cost 12W LED driver for a smart LED panel light. Ideally, the IC should: Support non-isolated offline topology Deliver constant current output

I am currently developing a 60W (12V/5A) converter using the InnoSwitch4-QR. I have designed and built the circuit by referring to the application design, and I am conducting experiments, but I am experiencing some issues. Based on the current test results, I have confirmed that the desired output appears normally

As the subject says, please add the EF16 core to all the design sheets for the above mentioned LED driver. (So Buck, Buck-Boost, Non-Isolated Flyback etc...). It is so far only available for Buck as far as I can tell, which already happened on my request.

Hi, I am attaching a specification for the BLDC motor controller for transformer cooling application. Please help me by suggesting a solution for the application. My maximum power rating of the motor is 350W. Maximum motor current is 12A, rated is 8A. Input voltage is 170VAC to 280VAC Single phase/Three

Hello, I’m working on a power supply design based on the DER-622 reference circuit using the LinkSwitch-TN2 (LNK3202D). My application is a 2-wire (no neutral) system supplying a load of approximately 20–50W. Recently, both R1 (20kΩ/1206) and VR4 (43 V Zener diode) were damaged (burned) during operation. I understand that

Hi everyone, I'm working on an isolated Flyback converter using the InnoSwitch3-EP (INN3679C). I understand that when using synchronous rectification, the SR FET should be placed in the return path (low side) because the SR driver is referenced to GND. However, for my initial prototype, I'm considering using a Diode

Dear PI team, I am working on a high volume project, and my specification are to build an ultra low cost AC/DC with an ouptut at 3.3V @15mA . Do you have a reference design for ultra low cost AC/DC with an ouptut at 3.3V @15mA max ? Or something

Hi Team, I am currently designing a flyback converter using the InnoSwitch3-EP. According to the design guide, the recommended switching frequency range for Transformer design is between 25 kHz and 95 kHz. I have a question regarding how to correctly enter this parameter in the PI Expert tool. Since the

Hi experts, I would appreciate it if you could provide the SPICE model for the TOP245YN device. I’m currently working on a power supply board that uses this component, and the board is exhibiting some issues that I believe could be better understood and addressed through simulation. Thank you!

Hi, I’m designing an isolated flyback converter and looking for a SPICE model for the InnoSwitch3-EP (INN3679C) to simulate and finalize the design. So far, I’ve only found SIMPLIS models on the Power Integrations website, but I’m running into issues with the demo version — the simulation doesn’t run at