Isolated 12 V SMPS Design

@markoa7

Hi there, I’ve studied your need for a compact isolated 12 V, 10 W SMPS around the ER28 fly-back transformer. I’ll retune and, where needed, redesign the magnetics, switch device, control IC, and protection network so they operate reliably at both 240 VAC and 24 V inputs with solid thermal margins and conservative stress levels suitable for industrial equipment. My approach is to select a robust fly-back topology, a suitable controller, and a bias network with careful snubber and clamp design, followed by detailed fly-back calculations (duty cycle, reflected voltage, current-sense limits, efficiency). I’ll deliver a complete schematic (PDF + editable), a BOM with part numbers, a basic bench-test plan, and layout notes focused on reliability. Create an engaging question about the project's specifics for the client, tone should be $gpt_tone Best regards, Marko Aleksic

@Adeel2k14

I have extensive experience developing SMPS power supplies for automotive applications using TDK, TI, and Analog Devices ICs. I will design a compact, reliable fly-back converter around your ER28 transformer, performing all necessary calculations—duty cycle, reflected voltage, current-sense limits, and snubber design to ensure 12 V/10 W output from 240 VAC or 24 V input. Deliverables include a complete schematic (PDF + editable), BOM with footprints, part rationale, efficiency estimates, and a simple bench test procedure. I can also provide work samples for your reference to demonstrate proven results.

@hayteekeys

KINDLY READ THROUGH MY PROPOSAL THIS IS WHAT I WILL DO - Design a compact, reliable flyback converter around your ER28 transformer (HT-ER2828-801A or close equivalent) for universal input (85–265 VAC or 24 VAC/DC) → 12 V / 10 W isolated output. - Use a proven, low-cost control IC (VIPer26 or similar integrated offline switcher) for simplicity, reliability, and good EMI/thermal margins in industrial use. - Include full protection (fuse, NTC inrush, TVS, snubber, OVP), conservative derating, and basic EMI filtering. - Deliver: schematic (KiCad/Altium editable + PDF), BOM with DigiKey/LCSC PNs, key calculations (duty cycle, reflected voltage, snubber, efficiency ~78–82 %), commentary on transformer match, and bench test checklist. RELEVANT PROJECTS - 2025: 15 W universal-input flyback (VIPer + ER28 core) for industrial sensor – reliable 24/7, <10 °C rise. - 2024: Dual-input (AC/DC) 12 V/8 W supply – similar topology, passed 1000 h burn-in. QUESTIONS - Measured primary inductance & turns ratio of your ER28 (or pinout/photo)? - Max ambient temp & enclosure size limit? - Preferred IC (VIPer26, UC3842 discrete, or integrated like TOPSwitch)? Offline flyback specialist, deliver complete design files + calcs in 5–7 days. I am Ready when you share transformer data!

@hayat38402

Hi, how are you doing? I went through your project description and I can help you in your project. your project requirements perfectly match my expertise. We are a team of Electrical and Electronics engineers, we have successfully completed 1000+ Projects for multiple regular clients from OMAN, UK, USA, Australia, Canada, France, Germany, Lebanon and many other countries. We are providing our services in following areas:  Embedded C Programming.  VHDL/Verilog, Quartus/Vivado, LabVIEW/ Multisim/PSPICE/VLSI  MATLAB/SIMULINK  Network Simulator NS2/NS3  Microcontroller like Arduino, Raspberry Pi, FPGA, AVR, PIC, STM32 and ESP32.  IDEs like Keil MDK V5, ATmel studio and MPLab XC8.  PLCs / SCADA  PCB Designing Proteus, Eagle, KiCAD and Altium  IOT Technologies like Ethernet, GSM GPRS.  HTTP Restful APIs connection for IOT Communications. Also, we have good command over report writing, I can show you many samples of our previous reports. Kindly consider us for your project and text me so that we can further discuss specifically about your project's main goals and requirements.

@Amidst

Hey there! I’m Alok, A PCB, Circuit and Mechanical designer with a passion for turning ideas into rock-solid, high-performance circuit boards. even expert on Python, C, C++ With nearly a decade of experience, I’ve tackled everything from compact consumer gadgets to complex industrial systems—always with a focus on precision, efficiency, and reliability. # Schematic & Layout Design – Clean, optimized, and manufacturable. # Component Selection & Library Management – No surprises, just the right parts for the job. # Reverse Engineering – PCB cloning, replication, and improvements. # Gerber, BOM & CPL Generation – Ready for seamless production. # DFM & DFA Expertise – Because great design means smooth manufacturing. # Multi-Layer, Flex, & High-Density PCB Design – Whatever the project needs. If you need a PCB and Code that’s efficient, reliable, and built for real-world performance, let’s chat. I’d love to help bring your project to life!

@Safeer143

Hello. I read your project description very carefully. I have completed many projects regarding Altium . I have a deep understanding and experience in the areas of microcontroller that you mentioned. We are a company of mechatronics, electrical, computer and software engineers with vast expertise in PCB layout, embedded systems, AC/DC converters, stepper motors, transformers, python, machine learning, raspberry pi, automation, power management, sensors & signal processing projects, unsupervised learning, reinforcement learning, genetic algorithm, convolutional model, recurrent network, We can assure you that your work will be done within the given timeline with complete task achievement. Feel free to contact for further queries so I may guide you well.

@abdurRafiqM

HI, I am an experienced electronics and PCB Design engineer, specialised in use of ECAD software such as Altium Designer, KICAD, EasyEDA, etc. for the the design of electronics and PCB. I will design your projects to meet your Requirements and the industry standard. I do all kinds of circuits such as Power delivery circuit, Sensor Integrated Circuits, wireless control, MCUs etc. I will deliver the following. The Schematics for your Design The PCB for the design Bill of materials(If needed) Gerber, Pick and Place and other manufacturing and assembly drawings needed. Full Support and consultancy till the project is done. Kindly send me message so we can discuss further on your project I look Forward to working with you. Best Regards, Abdur-Rafiq

@electronicsdone

Best Isolated SMPS Flyback Power Supply Design Expert ⭐⭐⭐⭐⭐ Hi, Thank you for posting your project, “Isolated 12 V SMPS Design.” I’ve reviewed your requirements and can help you develop a compact, reliable isolated flyback power supply using your ER28 transformer (HT-ER2828-801A or an optimized equivalent), delivering a stable 12 V DC at 10 W from 240 VAC or 24 VAC / 24 VDC input on shared terminals. I bring 11+ years of experience in power electronics, offline and low-voltage SMPS design, flyback converters, magnetics integration, and industrial-grade hardware. I’ve designed and validated isolated supplies for harsh industrial environments, focusing on conservative stress margins, thermal robustness, and long-term reliability. ✅ How I’ll Help You Succeed Retune or redesign the flyback topology to correctly match the ER28 magnetics, controller IC, switch device, and protection network. Perform and document all critical flyback calculations (duty cycle, reflected voltage, current limits, snubber design, efficiency). Select proven components with adequate derating for industrial use and stable thermal behavior. ✅ Before I start, one quick question: Do you prefer a primary-side regulated (PSR) or opto-isolated feedback approach for this design, or would you like me to recommend the best option after reviewing efficiency and regulation targets? If you share that, we can align quickly and move forward. Best regards, Prat PCB Must Innovations

@caddoctor247

As an accomplished Electrical Engineer with over a decade of experience, I have successfully designed and delivered numerous projects requiring intricate knowledge of magnetics, switching devices, control ICs, and protection networks. Offline fly-back converters are among my specialized areas and I have an extensive understanding of your requested specifications. I am confident that my expertise will guarantee a safe, reliable and efficient design for your SMPS. My familiarity with CAD, CAM and CAE software such as SolidWorks, AutoCAD and Fusion 360 enables me to deliver professional designs promptly in any format you prefer. I ensure that the components I choose not only match the ER28 specification but also optimize long-term reliability and thermal behavior - exactly what your project seeks. In addition to delivering the final schematic, BOM, calculations and commentary on component choices, I will also provide a straightforward bench test procedure so that you can easily reproduce the validation steps. My dedication to client satisfaction combined with my expertise in online fly-back converters makes me the ideal candidate for this project. Let us transform your vision into reality!

@hancho6319

With over five years of experience in electrical and electronic engineering, I have a deep understanding of the principles you need for this project. This background has strengthened my engineering problem-solving mindset, which is crucial for designing circuits that maximize reliability and longevity - exactly what your industrial equipment requires. Additionally, as an embedded systems engineer, I am proficient in C, Arduino, ESP32, and STM32. These skills will be effectively utilized in designing and building the embedded solution you need. Having trained as a Software Engineer recently for 12 months with ALX Africa, I also bring coding skills to the table that go hand-in-hand with this project's needs. My proficiency in Python will come in handy for the advanced calculations this project might require. In addition to my technical capabilities, I work comfortably with necessary developer tools like Vim, Emacs, Webpack, and Git for effective optimization.

@efanntyo

Hi there, ★ I’m Efanntyo, a seasoned full‑stack/embedded engineer with deep hands‑on experience in offline fly‑back converters, guaranteed to deliver a complete, ready‑to‑build 12 V, 10 W isolated supply around your HT‑ER2828‑801A (ER28 family). I will retune and redesign the existing schematic for reliable long‑term operation, harmonizing magnetics, switch device, controller IC, and protection networks. I’ll verify the fly‑back operating points with rigorous calculations (duty cycle, reflected voltage, primary/secondary currents, snubber sizing, and efficiency). The design will emphasize conservative stress margins, thermal reliability, and robust component selection suitable for industrial environments. What you’ll receive: - Final schematic in PDF and editable format (Altium or KiCad) optimized for your ER28 transformer and a standby 240 VAC / 24 VAC/24 VDC input scenario - Full BOM with manufacturer part numbers, footprints, and cross‑references - Key calculations: duty cycle, reflected voltage, current sense limits, snubber design, efficiency estimate, worst‑case stress margins - Commentary on part choices tied to the ER28 spec (or justified substitutions for reliability/availability) - A practical bench‑test procedure to reproduce validation with standard lab gear Approach: 1) analyze ER28 transformer data and define primary/secondary windings and leakage; 2) select a robust controller (overcurrent, short‑circuit, transient protection) and a fast, low‑Rds(on) switch

@Avatarist

Hello I Reviewed your Project requirements "I have an ER28 fly-back transformer on hand (model HT-ER2828-801A or an equivalent you may suggest) " and I’m confident I can Deliver Exactly what you’re looking for with precision and creativity. I Specialize in AutoCAD, 2D & 3D Graphics, Illustrations, Animation, and CAD drafting, and I always focus on Producing Clean, Professional Results that meet Client Expectations. What you can expect from me: * High-quality, detail-focused work * Fast and clear communication * Revisions until you are fully satisfied * Delivery in any required format (PSD, AI, PNG, JPEG, PDF, MP4, etc.) You can review my previous work here: https://www.freelancer.com/u/Avatarist I would be happy to discuss your project and start immediately. Best regards, Avatarist

@nadiad382

Hi, I've built multiple one-page websites and landing pages designed to convert visitors into leads or bookings, not just look good. I reviewed your project and understand you need a clear, focused page that explains your offer and drives action. My approach is simple: define the page goal, structure the content to guide users, and build a fast mobile-first page optimized for performance and SEO. I avoid bloated designs and focus on clarity, speed, and results. I can start with a clear section layout that highlights your expertise in offline fly-back converter design with detailed calculations, proven components, and thorough validation steps. Happy to discuss your goals and timeline. Nadia

@keaganmini

I am an excellent fit for your project, having successfully completed similar work in the past. Your need for a clean, professional, user-friendly, seamless, and integrated isolated power stage with reliable operation on both 240 VAC and 24 VAC/DC inputs is clear and achievable. I specialize in designing offline fly-back converters with thorough calculations and component selection focused on long-term reliability and thermal management. Even though I am new here, I have worked on numerous projects outside of freelancer and developed the skills necessary to complete this work effectively. I’d be glad to discuss your project—at best, we find a strong fit to work together; at minimum, you receive a complimentary consultation. Regards, Keagan.

@danielm0272

This proposal outlines a robust, industrial-grade 10W Flyback Power Supply designed to operate across an extreme universal input range (24V – 375V DC equivalent). By leveraging the ER28 core and the InnoSwitch3-CP architecture, we ensure high reliability and conservative margins suitable for long-term industrial deployment.

@peconsultation

Hello, With over a decade of experience as an Architectural and CAD Designer complemented by a strong Electrical Engineering background, I am well-prepared to deliver a meticulously optimized SMPS design tailored to your requirements. My expertise with offline fly-back converters ensures precise transformer selection, component sizing, and reliable long-term performance. Leveraging platforms like Altium and KiCad, I will provide a clean, comprehensive design package that includes schematics, PCB layouts, and thorough documentation. Every decision will be backed by careful calculations and verification, giving you a build-ready solution along with clear guidance for validation. Partner with me to receive a robust, precise, and fully accountable SMPS solution.

@sibisarge

Throughout my 4 years in the hardware design field, I have accumulated extensive experience in circuit design, electronics, and PCB layout, which are directly relevant to the isolated 12V SMPS design you require. Designing reliable and robust systems for industrial applications is my forte. Though your project doesn't require UL/CE certification at this moment, I prioritize long-term reliability for any product I develop. I understand that your focus is on a complete ready-to-build solution; not just a concept. My established expertise in this domain guarantees an output that will seamlessly integrate into your industrial equipment while meeting all functional specifications. Moreover, my proficiency in tools like Altium or KiCad ensures smooth delivery of the editable schematic alongside other required deliverables. I intend to complement my comprehensive engineer