The EF smps transformator relies on a unique ef magnetic core structure and mature production technology. Compared with traditional EE, EI, and ER series transformers, the miniature ef type high frequency transformer has multiple core competitive advantages and is suitable for high-frequency switching power supply conditions. It is the preferred device for small and medium power supply equipment.
Core advantages of EF winding transformer
1. Compact size and high integration: Adopting a flat E+F splicing magnetic core design, the window area is larger and the magnetic circuit is compact. Under the same power, the volume is reduced by more than 30% compared to traditional EI transformers, perfectly adapting to PCB dense wiring and miniaturized equipment design. It can be installed in various horizontal and vertical structures, saving internal space of the equipment and adapting to lightweight digital and smart home devices.
2. High frequency low loss, high conversion efficiency: using imported PC0/PC40 high-frequency ferrite cores, the high-frequency magnetic loss is extremely low, and it can stably adapt to high-frequency working scenarios of 20kHz-500kHz; Paired with multiple stranded enameled copper wires, it effectively avoids high-frequency skin effect and reduces work loss. The conversion efficiency of conventional models can reach 90% -95%, and the long-term working temperature rise is low, greatly improving the overall energy efficiency of the power supply.
3. Low leakage inductance and strong resistance to EMI interference: The magnetic circuit is symmetrical, the winding coupling is tight, and with the sandwich optimization winding method, the leakage inductance of the product can be controlled within 3%, far lower than that of ordinary high-frequency transformers. Effectively reducing the losses in the RCD circuit of the power supply, minimizing high-frequency electromagnetic interference, solving the problem of equipment EMC exceeding the standard, and ensuring more stable overall operation without the need for additional anti-interference components.
4. Good insulation and high safety level: UL94 V-0 flame retardant skeleton and PET high-temperature resistant insulation film are used throughout the process, with multi-layer insulation isolation between layers. The initial withstand voltage can reach 4000V AC/1min, effectively preventing high-voltage breakdown and leakage short circuit problems. The product has passed safety and environmental certifications such as CQC, UL, RoHS, REACH, etc., meeting the safety standards of civilian, industrial, and export equipment.
5. Temperature resistance, strong stability: The whole machine adopts epoxy sealing technology, which is dustproof, moisture-proof, corrosion-resistant, vibration resistant, and aging resistant. The working temperature range can reach -40 ℃~125 ℃, and the magnetic performance and electrical parameters do not show significant attenuation under wide temperature conditions. It can work continuously at high frequency for a long time and is suitable for complex industrial and outdoor working environments.
6. Outstanding cost-effectiveness and wide adaptability: The structural design is mature, the mass production process is simple, and the cost is lower than that of ER and EDR series high-frequency transformers. At the same time, the specifications are fully covered, the power span is wide, and the 5W-100W power range can be adapted. It is compatible with multiple power topologies such as flyback, forward, and half bridge, and has strong universality.
Customized Services
1. Customization of electrical parameters: primary turns, secondary turns, wire diameter ratio, transformer ratio, inductance, leakage inductance parameters can be customized according to needs; Adapt to various output voltages such as 85-265V wide voltage input, 5V/12V/24V/36V, accurately match different circuit topologies such as flyback, forward, isolation, and voltage stabilization, and strictly control temperature rise, loss, and withstand voltage parameters.
2. Customization of structural appearance: Supports customization of horizontal and vertical structures, with optional single slot and multi slot insulation skeletons; Standard pin specifications such as 5+5pin, 6+6pin, and 7+7pin can be customized, and pin spacing and length can be adjusted as needed; Support different structural processes such as bare metal, encapsulation, shielding, and copper foil grounding, and adapt to various installation methods such as PCB mounting and plug-in.
3. Customization of process performance: High frequency and low leakage sensing models, low-temperature upgraded models, high-temperature resistant models, high pressure safety compliant models, and EMI optimized models can be customized; Support sandwich winding method, layered insulation winding method, and fully shielded winding process, with special performance optimization for fast charging power supplies, industrial power supplies, and outdoor equipment to meet high load and long-term continuous work requirements.
4. Specification and power customization: covering micro 5W, 10W, 15W low-power models, conventional 20W/30W/40W universal models, 50W-100W high-power models, compatible with EF12.6/EF16/EF20/EF25/EF30/EF35 full series magnetic core specifications, non-standard sizes can be customized by mold opening.
5. Certification and environmental customization: We can customize special safety compliant models such as UL, CQC, VDE, CE, etc. The full range supports lead-free and environmentally friendly production, complies with RoHS and REACH export standards, and is suitable for various domestic civil, industrial, and foreign trade export equipment compliance requirements.
6. Customized supporting services: providing a complete set of transformer winding parameters, selection schemes, testing reports, and safety certification schemes; Support small batch samples, batch OEM, urgent delivery, and provide technical support for parameter debugging and circuit adaptation.
EF series transformer real-shot details：
Company Introduction
Shenzhen CXWON Technology Co., Ltd. is a trustworthy enterprise integrating R&D, production and sales. It specializes in manufacturing various types of inductors such as high-frequency transformers, high-voltage transformers, low-frequency transformers, audio transformers, negative ion generators, ozone high-voltage packages, mosquito-killing lamps, UV lamp power supplies, etc. Our products are widely used in household appliances, intelligent control, medical fitness equipment, communication devices, instruments and meters, security control, industrial control, ozone negative ion generators, energy conservation and environmental protection, etc. Some of our products have obtained safety certifications such as UL, TUV, GS, CE, FCC, CQC, etc.
Typical application scenarios
1. In the field of consumer electronics power supply: mobile phone fast charging adapter, digital product charger, power bank power board, laptop auxiliary power supply, set-top box power supply, router/switch power supply, Bluetooth device power supply, small appliance control board power supply, suitable for various small isolated and regulated power supply devices.
2. LED lighting driver field: indoor LED spotlights, tube light driver power supply, light strip driver, outdoor LED lamp power supply, intelligent lighting driver, dimming and color matching power supply, solar LED lighting power supply, low loss, low temperature rise characteristics suitable for long-term working conditions of lighting.
3. In the field of smart homes and small appliances: smart sockets, smart switches, camera power supplies, sweeping robots, humidifiers, rice cookers, induction cookers, fans, water heaters, and other home appliance control board power supplies. They are compact in size, strong in anti-interference, and suitable for precision circuits in smart homes.
4. In the field of industrial control equipment: industrial switch power supply, DC-DC conversion module, industrial control instrument power supply, sensor power supply, PLC auxiliary power supply, automation equipment control power supply, industrial grade high temperature resistance, vibration resistance, high voltage resistance, suitable for complex industrial working conditions.
5. In the field of new energy and energy storage: small photovoltaic micro inverters, energy storage module power supplies, outdoor energy storage equipment, charging pile auxiliary power supplies, new energy small household appliance power supply systems, wide temperature stability, low loss, suitable for high-frequency conversion needs of new energy equipment.
6. In the field of precision instruments and communication, power supplies for medical small equipment, detection instruments, communication equipment, and security monitoring are provided with high isolation and low interference to ensure the stable operation of precision instruments and avoid electromagnetic interference affecting detection accuracy.
Flowchart
FAQ
Q1: What types of magnetic components can you customize?
A: We offer complete OEM and ODM services for high-frequency transformers, low-frequency power transformers, common-mode inductors, power inductors, ring coils, flat wire inductors, filter reactors, and multi-winding coils. Support through through-hole/solder pad (SMD), vertical/horizontal installation, optional EE/EI/PQ, ring ferrite or silicon steel core. Widely used in switching power supplies, new energy chargers, industrial control, medical equipment, and solar inverters, etc.
Q2: What technical parameters need to be provided when making the quotation?
A: You can provide electrical parameters (inductance value mH/uH, DCR, Isat, turns ratio, operating frequency, withstand voltage value), size drawings, physical samples, operating temperature range, environmental requirements, and annual order quantity. If only the application scenario is provided without the complete specifications, our engineers will design a solution for you for free.
Q3: Can I customize the inductance value, DC resistance (DCR), leakage inductance and insulation voltage?
A: All electrical parameters can be adjusted. We offer inductance tolerances of ±5%, ±10%, and ±20%; we use multi-strand Litz wire to reduce DC resistance and heat generation; we control leakage inductance for high-frequency transformers; the insulation withstand voltage can be selected from 1kV to 5kV.
Q4: Can I customize the pin type, wire length and installation structure?
A: Yes. We support vertical/horizontal through-hole, SMD base, extended leads, custom wire color, insulating sleeves, vacuum impregnation, epoxy resin casting, metal shielding casings, and customer-specific part number silk-screening, etc.
Q5: Will the unit price be lower if the order quantity is larger?
A: We use a tiered pricing approach. The larger the order quantity, the lower the raw material costs for the cores and wires, and thus the unit price decreases accordingly. Long-term cooperative customers can enjoy additional annual discounts.
Q6: If I only have the requirements for the equipment application, can you provide the design drawings?
A: We offer free development services for magnetic component solutions. Our engineers will generate circuit diagrams, winding specifications and size drawings based on the power, frequency and size limitations of the equipment. After confirmation, samples will be produced.
Q7: What tests will be conducted before shipment? Can test reports be provided?
A: 100% comprehensive inspections will be carried out for inductance, DC resistance, withstand voltage, on-off capability and appearance; sampling inspections will be conducted for aging, high and low temperature cycling, salt spray, and vibration. Corresponding quality inspection reports for each batch of goods can be attached. The complete inspection data for long-term cooperative customers will be archived for a long time.
Q8: Can I choose different magnetic core materials?
A: All series of magnetic core materials can be selected: manganese-zinc ferrite and nickel-zinc materials are suitable for high-frequency scenarios; iron-silicon-aluminum and iron powder cores are used for large current inductors; cold-rolled silicon steel sheets are used for low-frequency transformers. We will select the optimal magnetic core based on loss, current, and usage frequency requirements.
Why choose us
1. Comprehensive after-sales service:
The company adheres to the principle of relying on the rich experience of its technical staff, complete production equipment and scientific management. With reasonable prices, warm services, it has won the trust and cooperation of customers both at home and abroad.
2. Focus on high-quality transformers:
The company has complete production and processing equipment, strict management system, professional technology and production personnel. The equipment is complete, and it specializes in processing and manufacturing with a complete production process. Its strength and product quality have been recognized in the industry.
3. Complete product range:
The company adheres to the concept of innovation and pragmatism, and is committed to the research, production and sales of ring transformers. Currently, the main products include low-frequency transformers, reverse transformers, 220V to 110V power voltage conversion transformers, power transformers, ring-type transformers, cylindrical transformers, etc.
4. Strong production conditions:
We rely on a large-scale, automated production base, advanced technology and strict quality management, which have created strong production capacity and stable product quality. We can provide customers with timely and reliable supply guarantees and formulate exclusive solutions for different usage scenarios.
The company adheres to the principle of relying on the rich experience of its technical staff, complete production equipment and scientific management. With reasonable prices, warm services, it has won the trust and cooperation of customers both at home and abroad.
2. Focus on high-quality transformers:
The company has complete production and processing equipment, strict management system, professional technology and production personnel. The equipment is complete, and it specializes in processing and manufacturing with a complete production process. Its strength and product quality have been recognized in the industry.
3. Complete product range:
The company adheres to the concept of innovation and pragmatism, and is committed to the research, production and sales of ring transformers. Currently, the main products include low-frequency transformers, reverse transformers, 220V to 110V power voltage conversion transformers, power transformers, ring-type transformers, cylindrical transformers, etc.
4. Strong production conditions:
We rely on a large-scale, automated production base, advanced technology and strict quality management, which have created strong production capacity and stable product quality. We can provide customers with timely and reliable supply guarantees and formulate exclusive solutions for different usage scenarios.
