PI Forums

Hi, Near the top of page 6 of AN57, Q is said to be set to 0.15. How is this calculated? Which equation is used? I just calculated Q for the DER243 flyback and it comes out as Q = D' x R x SQRT(C/L) = 25.8 for DER243 at

Hi, Every time i try and do a TOPswitch JX design in PI Expert or PI XLS, it always reverts to Innoswitch even though i chose TOPswitch JX. How do you stop this?

在使用PI Expert Online 设计软件时输入与RDR-767 7W DEMO BOARD同样的设计参数，但有关变压器部分的设计数据与DEMO应用指南不一样，差距很大，不知道是什么原因？请予解释。

Hi, If there is an external current sense resistor on the IS pin, the InnoSwitch has options to set the overload response in two different ways. The device is configured to have the FEEDBACK pin auto-restart enabled; and the device is configured for overload response. How to configure ? What

I have been creating chargers for many years. I use TOP250 microcircuit. The power of my chargers is up to 210 watts. I use my unique charging method (algorithm) for lead-acid batteries. Therefore, I need to very precisely control the output voltage of the charger. About 150-200 times per second

Hi to all, I'm testing a power supply with PFC pre-regulator, that mantain the DC-bus at 400 V. The output are a 24V, 1.8 A and a 15V, 0.5 A. I'm not using a SR rectifier, but a SIC diode on the 24 V output.. All seems okay, except for

How can I fix my car's loss of power?

Hi good morning, I am working on power supply design using TOP267KG-TL. Inputs: 19.2Vdc - 264Vdc Output: 12V, 5W. 12V is converted again to 5V. Question 1) When I am giving input 14Vdc then converter is going in auto restart mode. When I am making input voltage jump from 14V

I'm asking because I'm testing this gate driver with an Eupec/Infineon FZ1200R33KF2C (I know there's a gate-drive module specifically made for this IGBT, but it is too expensive for my application). My application is pulsed power, and I'm getting very fast spikes in the gate line at turn-off, and others

Hi I noticed in the DER538, details about the conducted EMC scans. On page 41, the setup shows a small green wire coming to the LISN. Please advise what is this? Is it the earth bonding? We thought that had to be done with a short thick connection? Also, in

To whom it may concern, We develop AC-DC power supplies. We are testing by applying your gate driver. The product specifications are as follows. INPUT : 400VAC Topology: Full Bridge IGBT : FF200R12KT4 IGBT RMS CURRENT : 100A You are setting up Desaturation functionality and to achieve Ref. voltage 9.3V

Hello Everyone, I am making a 85-265V AC universal power supply with 30V 1.8A output using INN3168C-H101. I encountered a problem during the tests, sometimes when I power the device, the 47R fwd resistor burns and the INN3168C gets damaged. However, if the device manages to start properly, it can

Hello Community, we have a power supply 5V 1,5A with INN3672. It is working with no load up to 10 mA normally and above 20 mA up to maximum of 1,5A as well. But between 10 an 20 mA load it keeps restarting. Do you have an Idea what could

Hi, I would like to design Flyback with Inno Switch. Output power is 5W (15V) and Input is 100-300VDC. For a Flyback design, we consider Dmax=0.45 @ Min input voltage and full load and proceed to find Magnetizing Inductance and further transformer design. But, When I entered in the tool

Hi, We have designed SMPS 24V/3.5A, Input range 180V to 265V AC 50Hz, Input cap 100uF/450V Device used INN-3670C, observed that during Vin=180V, Output current= 3.0A worked for 15min & Rfwd resistor 47E(250mW) is failed. However SMPS withstood (On for 3hrs) for same load when Vin=240V. regards Sreenivasan. M

Hi Experts, Good day! I'm having some difficulties. 1.What does this detector module do? 2.Where did this INH signal come from? What is the role? 3.Is this control module a digital module? Can I understand that inside is a circuit similar to a NAD/OR gate? Thanks!

Hi Experts, Could you please explain what this means? Is Ton plus Toff equal to one cycle? For example, if one cycle is 30 µs and Ton is 20 µs, then is Toff equal to 10 µs?"

Hi, I am trying to implement the reference design RDR 838 which gives multiple output voltages. How will be able to trigger these different voltages at the output?

Hi Experts, Do you have SIMPLIS Modle for Tinyswitch-4？I am working on a project and need this model for simulation verification. Could you please provide the model? Thanks！

I have design based on der-960 with INN4377. In load below ~4A(20v) power supply work stable without any noise. But after some threshold when I try rich 5A(20v) it jump to higher frequency instantly and I can see SOA protection(I assume it) on main switching. It's create a lot of