Low Loss Custom PQ2020 High Frequency Transformer for Stable Switching Device

The PQ2020 Series High-Frequency Transformer represents a pinnacle of magnetic engineering, specifically designed to meet the growing demand for high power density and ultra-compact footprints in modern electronic designs. The "PQ" (Power Quality) core geometry was originally developed for high-density power applications to provide an optimum balance between physical size, power-handling capability, and electromagnetic interference (EMI) suppression.

The PQ2020, with its standardized 20mm height and core volume, fits the "sweet spot" for switching power supplies (SMPS) ranging from 30W to approximately 75W, depending on the switching frequency and circuit topology. It effectively bridges the gap between smaller E-core designs and much larger, bulkier magnetics, making it the preferred choice for engineers building slim-profile adapters and high-efficiency industrial modules.

As seen in the technical image, the CHIPSEN PQ2020-360-13395 features a vertical through-hole mounting configuration with a high-strength, flame-retardant bobbin. The core is constructed from high-permeability Manganese-Zinc (Mn-Zn) ferrite, optimized for switching frequencies typically between 65kHz and 500kHz. The use of specialized insulation tapes and precise winding techniques ensures that the transformer meets the strictest international safety standards for creepage and clearance distances.

• Superior Power-to-Volume Ratio: The PQ core shape offers a larger winding window and core cross-section compared to traditional EE cores of the same size, allowing for more power to be packed into a smaller physical volume.
• Optimal Magnetic Shielding: The round center leg and flared outer legs of the PQ core provide a semi-closed magnetic circuit that drastically reduces radiated EMI, simplifying the process of meeting CISPR and FCC Class B requirements.
• High Efficiency Mn-Zn Ferrite Core: Utilizes high-grade PC40/PC44 or equivalent materials to ensure minimal core losses (Pv) and high saturation flux density (Bsat), even at elevated operating temperatures.
• Professional Insulation System: Features multi-layer high-temperature insulation tapes and a UL-recognized bobbin, providing a safety isolation barrier capable of sustaining up to 4000V AC dielectric stress.
• Low Leakage Inductance Architecture: Precision winding patterns and optimized primary-secondary interleaving reduce leakage inductance to less than 1-2% of the primary value, protecting switching semiconductors from voltage spikes.
• Excellent Thermal Dissipation: The open design of the PQ bobbin sides facilitates natural air convection, allowing the transformer to run cooler under heavy loads, which directly extends the life of neighboring capacitors and components.

The PQ2020 series technical profile is a reflection of its robustness. The following table provides foundational performance ranges for our high-precision industrial series. Every electrical parameter is fully customizable.

Understanding these parameters is vital for B2B procurement and long-term system reliability. The Mn-Zn Ferrite Core Selection is the most critical technical choice; by using high-grade materials like PC44, we ensure that the transformer exhibits a high saturation flux density even as the operating temperature approaches 100°C.

In a high-speed switching supply, the Leakage Inductance is a major factor in efficiency and reliability. Through our proprietary "sandwich" winding patterns, we minimize the flux lines that do not link the primary and secondary coils. This reduction in leakage inductance directly translates to smaller voltage spikes across the switching MOSFET, often allowing designers to use a smaller, lower-cost snubber circuit.

Furthermore, the Dielectric Strength (Hi-Pot) of 3000V-4000V makes this transformer suitable for isolation applications in both consumer adapters and rugged industrial environments. The Insulation Rating of Class F (155°C) or Class H (180°C) is achieved through high-quality copper wire and specialized tapes, ensuring the component survives the heat cycles associated with 24/7 industrial uptime.

Every CHIPSEN PQ2020 unit is verified using advanced Automatic Test Equipment (ATE), ensuring that parameters like DCR (DC Resistance) and turns ratio are perfectly consistent across every batch, providing you with a "set-and-forget" component for your most valuable production lines.

The excellence of the PQ2020 High-Frequency Transformer is driven by its Advanced Material Science and Manufacturing Integrity.

Unlike traditional E-shaped cores that have square corners where flux lines can "bunch up" and cause localized heating, the PQ core features a circular center leg. This circular geometry is not just for ease of winding; it allows the copper wire to follow a natural path with the shortest possible length per turn. This reduction in wire length directly lowers the DC resistance (DCR) and minimizes copper losses, resulting in a transformer that is significantly more efficient than its competitors of the same volume.

To meet the most stringent international safety standards while maintaining a compact size, we can utilize TIW for the primary or secondary windings. This provides reinforced insulation within the winding window itself, effectively doubling the safety margin without the need for additional tape layers that would consume valuable space. The winding process is performed on high-precision CNC multi-axis machines, ensuring that every turn is placed with consistent tension and spacing. This precision eliminates the risk of internal short circuits and ensures that the parasitic capacitance is minimized, which is essential for stable operation at switching frequencies above 200kHz.

The Resin Impregnation / Vacuum Varnishing process then locks the assembly into a moisture-proof, vibration-resistant monolithic block. Once the core is assembled and the windings are finished, the unit is subjected to a vacuum varnish cycle that pulls all air pockets out of the winding layers and replaces them with a high-grade dielectric resin. This not only makes the unit resistant to corrosive industrial gases but also eliminates the audible "whining" or "buzzing" sound caused by magnetostriction during high-frequency operation. This makes the PQ2020 ideal for applications in noise-sensitive environments like offices, bedrooms, and medical clinics.

Lastly, the Automated Optical and Electrical Verification system provides the final layer of professional quality. When you source the PQ2020 from CHIPSEN, you are sourcing a component that has been pre-validated. We utilize high-resolution cameras to verify bobbin integrity and pin alignment, followed by a full electrical sweep of every unit. This significantly reduces our clients' "Total Cost of Ownership" (TCO) by eliminating incoming inspection failures and field returns. From the choice of RoHS-compliant solder to the selection of high-temperature bobbins, every detail of the PQ2020 is optimized for the highest levels of industrial and commercial compliance.

The versatility and high power density of the PQ2020 series make it a staple across a vast array of high-tech sectors.

In the Industrial Automation and Power Quality sector, this transformer is the primary choice for the power stage of PLCs (Programmable Logic Controllers), robotic arm controllers, and high-capacity DIN-rail power supplies. Industrial environments are notoriously "harsh" with constant electrical surges and high ambient heat. The robust isolation and thermal stability of the PQ2020 ensure that the control electronics receive stable, clean power even in the presence of massive motor-driven noise, preventing system crashes and costly production downtime in automated factories.

In the Medical Device and Laboratory Equipment industry, the PQ2020 series is prized for its high dielectric isolation and low EMI signature. Medical devices such as patient monitors, imaging peripherals, and portable diagnostic tools require isolation levels that exceed standard commercial electronics. The PQ2020's ability to provide 4000V AC isolation while maintaining a small footprint allows for the design of compact, bedside medical units that are both safe and lightweight. Its electrically quiet nature ensures it does not inject noise into delicate analog physiological sensors, preserving the accuracy of patient data during critical monitoring sessions.

The Telecommunications and Enterprise Computing industry relies on the PQ2020 series for its efficiency and high frequency of operation. With the rollout of 5G base stations and high-speed data centers, the demand for compact, efficient "Point-of-Load" (PoL) and AC-DC converters has skyrocketed. The PQ2020 series allows for the creation of high-wattage power supplies that fit into standard rack-mount chassis without overheating. Its low core loss at high frequencies directly contributes to a lower "Power Usage Effectiveness" (PUE) ratio, which is a critical metric for global data center operators looking to reduce energy costs and carbon footprints.

Lastly, in Renewable Energy and Smart Grid applications, the PQ2020 series provides the stable power needed for solar inverter control boards and EV (Electric Vehicle) charging station management modules. These systems often operate in unconditioned outdoor cabinets where temperature swings are extreme and long-term reliability is paramount. The PQ2020's moisture-proof encapsulation and high thermal mass make it the definitive choice for long-term infrastructure projects. From the heart of a hospital to the core of a data center, the CHIPSEN PQ2020 is the trusted partner for engineers who demand the perfect balance of power, safety, and reliability.

Chipsen Electronics is a professional manufacturer specializing in high‑performance transformers and magnetic components, with more than 26 years of in‑depth manufacturing expertise in this industry.

Founded in 2000, Chipsen has grown steadily over decades. We now run 4 production bases, with strong manufacturing capacity, covering over 7,200 square meters and staffing over 400 skilled employees, which guarantees stable production capacity and fast order delivery for customers worldwide.

We hold authoritative certifications including ISO9001, ISO14001 and IATF16949. Our products are approved by UL Class B/F/H, CQC, RoHS and REACH. Up to now, we have obtained 36+ utility patents, supported by our robust in‑house R&D team. Our technical strengths enable us to deliver targeted solutions for temperature reduction, noise cancellation and coupled radiation conductivity.

Our product portfolio covers full‑range standard models. Meanwhile, we provide flexible custom development service -- we can develop products strictly according to customer drawings or samples.

Committed to environmental‑friendly production and reliable qualified products, Chipsen aims to be a global trusted transformer and inductor supplier, delivering high‑efficiency, on‑demand solutions for global partners.

• Full Service Customization: From concept to mass production, our engineering team provides rapid design support within 24 to 48 hours based on your drawings or specifications.
• Extensive Product Portfolio: 200+ product types including high frequency transformers, toroidal transformers, flyback transformers, inductors, filters, and common mode chokes, covering diverse industrial applications.
• Advanced Manufacturing Capability: Equipped with automated winding and assembly machines, improving efficiency by up to 8x while maintaining consistent product quality.
• Strict Quality Control System: 100% testing procedures including electrical performance, insulation, and reliability tests to ensure compliance with international standards.
• High Voltage & High Frequency Expertise: Specialized in 5KV to 40KV high voltage transformers and high-frequency power solutions with low loss, high efficiency, and low temperature rise.
• Flexible MOQ & Fast Lead Time: Support from prototype orders to bulk production with lead times as fast as 7 to 15 days.
• OEM/ODM Supported
• Competitive Factory Direct Pricing
• Strong R/D Team With Rapid Response
• Stable Supply Chain For Long Term Cooperation
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