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Hello, I am working on a design based off of the awesome reference design document with document code DER-901 (title: "125 W 2-Stage Boost and Isolated Flyback Dimmable LED Ballast Using HiperPFSTM-4PFS7628C and LYTSwitchTM-6 GaN-based LYT6070C"). I am having trouble finding the recommend core type for T4 (page 26). In

Hi evertone, I'm using the TNY286DG-TL chip along with the PI EXPERT tool to design a 12V/1A power supply. I've created a diagram, but I have concerns about the transformer I'm using. My question is: Will the design I'm showing below work correctly at 220VAC @ 60Hz?

Hi, We are doing a 130W Two Tran Forward with vout = 24V. It will power two other isolated SMPS's , so that they can give their isolated outputs, as well as giving a 24V, 48W output itself. Is it true the HiperTFS cannot be used with vin

So I have to repair an ac/dc adapter utilises a TNY278PN chip, but the problem is it's decapitated (exploded), and the title part of its case has been lost. But the man who teardowned the device, just after incident, SAW that now missed part of the case, and put all

I want to ask about how the Integrated circuit decides the proper (di/dt) for next cycle , the voltage across an inductor/transformer is L*(di/dt) the Integrated circuit TNY289 as I understand it ramps up current so that (di/dt) is constant and consequently the voltage across an inductor/transformer is constant during

Hello, i tried to set the "response time" Tax according to the manual page 13 to the minimum with 100pF and 24kOhm. I got ~6 to 7 us "response time" for the Vcesat desaturation detection (with sense diodes). I used the application proposal Fig. 8 (also on page 13 -

I am trying to design a simple power supply using TNY268 , I connected the circuit as in the attached schematic Where the input of the attached schematic is connected to the output of a bridge and smoothing capacitor , I understood from the datasheet that at the beginning of

Hi i'm currently designing a power supply that can work with inputs of 24, 48, 120 and 240Volts For this purpose i'm using different transformer ratios, one for 24-48 and another ratio for 120-240 I haven't seen a design with an input lower than 85 VAC, but i read in

We are building a 7W led driver based on LYT0006. We constructed the circuit based on A17/A19 LED Driver Lamp Replacement document. observations + Rectifying and smoothing part is working well . It is giving 320V . (for 230AC) + When we connect the rectified 320V with LYT0006 ( BUCK

Greeting, We're looking at the evaluation boards DER-977, DER-978, and DER-984. However, we weren't able to find the design report or application note for the latter two. Do you have these documents available to share with us? Regards, Alex

Hello, I am using Link switch-HP (LNK67xxE) for 10-35W flyback converter designs. We have multiple designs with different input voltage ranges and output power level. Designs are generated using PI Expert & PI Xls , these designs are working fine with some iterations of feedback and programming resistors values. However

We need power losses of buck-boos convertor inductor with thermal rise. Input voltage - 5.4 to 16V with Output current - 0.6A & ambient temperature 95 degree Celsius. we used part Inductor - SRP5015TA-220M

https://www.power.com/products/scale-2-driver-cores/2sc0108t On the datasheet for the core drive (above) there is a definition of the dv/dt maximum: Anyone know how this has been measured and what the dV value is for this dV/dt ? What is the definition of dV/dt in this case ? Is it over a defined period

Hello: The RDR-747 reference design document has instructions for constructing the transform used in this reference design. The Bobbin part number is listed as # TBD_EQ-2506-6 on page 11 (line 42 of the BOM) Could you please advise to a proper part number that can be sourced through distribution channels

Hello! I trust this post finds you well. I am a student at AGH University of Science and Technology, majoring in Electronic Engineering. Currently, I am working on my engineering thesis project, focusing on the application of transformers in the design of a "Flyback converter with very wide input voltage."

You need to check whether the two types of TOP227YN are genuine. Please refer to the attached file for photos.

Hi, Does PI have any design examples with transformers wound for 4kV for 1 sec, or 4kV for 1 min?

Hello, I've designed a board with TOP260Y - with this design I can produce a power supply 24V 4A and 15V6,5A universal input 88-265Vac I've put resistor to control Voltage start up and current limit in function of input voltage. all works well, but I have some trouble during output

I am attempting to create a circuit that can supply at least 12V DC and a current of 360mA or more. Currently, I am using a reference schematic for the LNK306DN, which is providing only 12V at 120mA. My goal is to achieve a 12V DC output with a current

Hi Power Integrations Support Team, I have designed battery charger circuit based on TNY268PN to charge 12V 2.2Ah Sealed Lead Acid Battery. I attached the circuit schematic to this thread. The schematic is based on the circuit given in TNY268PN datasheet (Datasheet Figure 14 2.5W CV CC Battery charger schematic)