Litone Electronics Co., Ltd - LTE - An Agile Specialist of Magnetics Components and Switching Power Supplies.

EE Type Power Transformer | High Frequency Transformer Manufacturer | LTE

The E & EF core is the industry-standard transformer construction used across the majority of modern electronics designs. In Europe, the EF variant is the more commonly specified profile. Its symmetrical E-shaped core halves provide efficient flux path geometry, good thermal dissipation, and straightforward bobbin-based winding — making it a reliable, cost-effective choice for high-volume power supply manufacturing. LTE is a high-quality EE Type Power Transformer, EE Core Type Transformer manufacturer from Taiwan since 1987. Li Tone Electronics was founded in Taiwan, with nearly 40 years of experience of designing and manufacturing transformer and coils. In 2000, we stepped into the field of power supply. With our experience inmagnetic industry, and our strong R&D team, we have developed a wide range of power supply products

EE Core Type Transformer | High Frequency Transformer Manufacturer | LTE

EE Type Transformer | Top-quality Magnetics Components and Switching Power at competitive prices are our commitment to our customers.

EE Type Power Transformer - EE Type Transformer
  • EE Type Power Transformer - EE Type Transformer

EE Type Power Transformer

EE Type

EE Core Type Transformer

The E & EF core is the industry-standard transformer construction used across the majority of modern electronics designs. In Europe, the EF variant is the more commonly specified profile. Its symmetrical E-shaped core halves provide efficient flux path geometry, good thermal dissipation, and straightforward bobbin-based winding — making it a reliable, cost-effective choice for high-volume power supply manufacturing.

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Product Applications, Available Sizes, Power Supply Design Considerations

Product Applications

EE/EF type transformers are widely deployed across:
●Switching-Mode Power Supplies (SMPS) — isolation and voltage transformation in AC-DC and DC-DC converter topologies
●Switching AC-DC Adapters — external and desktop power adapters for consumer and industrial equipment
●Electronic Power Boards — embedded power stages within larger system PCBs
●Battery Chargers — single- and multi-stage charging circuits for consumer, industrial, and EV-adjacent equipment
●LED Drivers & Lighting Power Supplies — constant-current/constant-voltage isolated designs
●Industrial Control & Automation Equipment — auxiliary and control-circuit power supplies
●Telecom & Networking Power Modules — isolated DC-DC conversion stages

Available Sizes

Litone manufactures EE type transformers across the full range, from the compact EE8.3 up to the high-power EE60, with custom designs available on request.
●Standard/Small-to-Medium Sizes: EE8.3 ｜ EE10/11 ｜ EE13 ｜ EE16 ｜ EEL16 ｜ EE19 ｜ EEL19 ｜ EE20 ｜ EE22 ｜ EE25 ｜ EE25.4 ｜ EEL25 ｜ EE30 ｜ EE35 ｜ EE40 ｜ EE41/33 ｜ EE42/15
●High-Power / Large-Format Sizes: EE50 ｜ EE55 ｜ EE57 ｜ EE60

Power Supply Design Considerations

Selecting and designing an EE-type transformer involves several key engineering trade-offs, and Litone's engineering team supports customers through each of them:
●Core size vs. power rating — matching core cross-sectional area (Area Product) to the required output power while managing core loss and temperature rise
●Switching frequency optimization — core material selection (ferrite grade) tuned to the converter's operating frequency to minimize core losses
●Winding structure — sandwich or interleaved winding arrangements to control leakage inductance and improve coupling for higher-efficiency designs
●Isolation & safety compliance — creepage/clearance distances and insulation systems designed to meet safety standards (e.g., IEC/UL) for the target application
●Thermal management — bobbin and core geometry selected to support adequate heat dissipation at rated load
●EMI considerations — shielding options and winding techniques to reduce common-mode and differential-mode noise
Because virtually every modern power supply has unique electrical and mechanical requirements, most EE-type transformers are custom-engineered rather than used off-the-shelf. Litone provides full design and engineering support — from initial electrical specification through prototyping — to help customers optimize efficiency, size, and cost for their specific application.
Contact Litone for custom EE transformer design and engineering support.
 
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EE Type Power Transformer | High Frequency Transformer Manufacturer | LTE

Based in Taiwan since 1987, Litone Electronics Co., Ltd has been a manufacturer of high efficiency electric power switching supplies. Their main power supplies include, EE Type Power Transformer, switching power supplies, power transformers, coil inductors, BLDC motor controllers, switching AC/DC adapters, and 110V, 12V, 24V power supplies, which are ISO 9001, ISO 14001, SGS certified and IATF 16949 accredited by DEKRA. LTE is able to design and manufacture power transformers from analog to digital, especially in magnetic industry.

Li Tone Electronics was founded in Taiwan, with nearly 40 years of experience of designing and manufacturing transformer and coils. In 2000, we stepped into the field of power supply. With our experience inmagnetic industry, and our strong R&D team, we have developed a wide range of power supply products

LTE has been providing customers with design and manufacturing of transformers and coil components, both with advanced technology and 40 years of experience, LTE ensures that each customer's needs are met.