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Hi, I need to design a flyback SMPS with the following requirement: Input voltage range: 290 - 800 VDC Isolate Output: 24V Output power : 50W. I was trying to use your excellent PI Expert Online but when I introduce my inputs requirements, a pop-ups a warning windows saying that

Dear All, I have designed a power supply based on DPA424 with input 38 to 58V and output of 12V,1.5A and 18V,0.3A. I want to test the hardware prototype developed. What is the general test procedure and at what load I should keep for initial test (say 10% etc). What

Hi, we have a TOP255GN flyback SMPS design for 100-265vac and 24vout, 24wout. It is failing our 4kv/2s hipot test. This is the hipot tester that we use... https://national-instrument-hire.co.uk/megger-ft4-flash-tester The flyback is totally surrounded in an earthed metal enclosure. Many of the components are near to the enclosure walls. Also

Dear Sir, We have designed 150W power supply (12V, 12.5A) based on the document shared by our PI FAE. I can not share the document as it is mentioned confidential on that, May be I can share document number if required. It is based on TOPSwitchTM-JX TOP271EG. We need this

Hi. My first PI Expert flyback converter design recommends a PQ26/20-3F3 core. All the listed cores appear to be 3F3 which seems to be a Ferroxcube material. The PQ26/20-3F3 core doesn't seem to be available anywhere in small quantities. Would a TDK N97 PQ25/20 core be an acceptable substitute? I'm

I have designed an SMPS with INN2904K, with the following specifications : Vin: 65- 265 VAC Freq: 50 Hz Vout : 24 VDC ; 750 mA - Isolated With a load of 500mA, the IC heats upto 85°C in an ambient temperature of 25-26°C. Apart from increasing the heat sinking

Hi, I need to develop an isolated 5 W SMPS to be connected Line-to-Line on 3P 400 V main. It means the rectified input voltage span is 450-650 V. I can't find any reference design or discussion about. Any help? Thanks in advance.

Dear All, I am making a DC-DC Converter for auxiliary power supply application. The input is 40-58V. The outputs are 18V,0.3A and 12V,1.5A. The initial design I got through PI designer, Based on available components, I made few changes. Can you please review the layout if its acceptable both functionally

Hallo, I am currently using the TNY280P, and the auxiliary voltage is around 12V at no load. Under load, the auxiliary voltage increases to up to 38 V. I would like to use zhe Overvoltage Protection. What value should the Zener diode have? Thanks

I wanted to design 10W DCDC converter using DPA switch DPA424GN with 3 outputs that accepts input voltage 8 to 32 VDC . However DPA accepts input voltage 16-32V DC. Shall I extend the input voltage range as 8 to 32V by adding pre boost converter stage. boost converter with

https://www.power.com/sites/default/files/documents/innoswitch3-ce_family_datasheet.pdf Looking for the proposed layout, I have a very similar PSU structure ( CM choke-rectifier-bulk cap-InnoSwitch-Ycap ), with no AC-OUT spark gaps. No need more than 8kV ESD testing. -what is a recommended size of spark gaps across the common-mode choke? -are this spark gaps is simply reducing the

We applied to an internationally and well known accredited laboratory for LVD certification of our LED driver designed with INN3162C. Although our product meets SELV specifications in terms of insulation, it is considered "no-insulation" by lab. The reason is given to be "inductive coupling" rather than "optical coupling". The article

Hi Im making 20W in CV (5V) The primary bypass cap charge to 5.16V and i think it is noraml voltage but the secondary bypass cap doesn't charge at 4.4V We use diode for SR FET so SR pin is connect to ic GND. I understand that the under registor

Hi, Kindly help me with the MTBF and FIT value for the below part no. Part#: INN3166C-H101-TL Manuel Chiumarulo

In the circuit, I did not see pin 6 of T8 connected to pin G or pin S of U5. Is this correct? Please refer to the attachment for the circuit。 I hope someone can help me answer. Thank you very much。

Dear Sirs, I would like to know if the TNY276GN is original or not. The lot number is 6K702M and date code 2215, COO Malaysia. I would be grateful if anyone helps me.

I have following question: For TOP265KG-TL is there any limit for negative startup current? We got some specification in that it is given that negative starting current limit for TOP265KG-TL is -200mA. Negative startup current means source to drain current. But in TOP265 datasheet & other application note, we have

I'm replacing a blown LNK304 in a washing machine. After replacing this component plus the 33ohm fusible resistor, I found that the output voltage is pulsing at aprox 500ms. Tested all the components in the power suply and all are ok. Mounted an external board with the same schematic as

I am using TOP268KG-TL for 4.5 W output. At 19.2V DC converter operating in CCM, But from from 40V above it is operating in DCM. Input: 19.2 - 373V DC & Universal AC input output: 12V, 5W Transformer: Primary 24; Secondary 16; Auxillary 17 ( output voltage 15); Primary magnatizing

Hi Im making 20W adaptor using INN3279C-H114 The topology is Quasi-resonant flyback and input is 220rms and out put is 5V 4A CV The R2CD snubber spec R=270K C=1000p Line R with diode=33 but when we simulate the product the IC get hotter and E-load voltage is getting up but