Sign In | Join Free | My uabig.com
China Dongguan Chipsen Electronics Technology Co., Ltd. logo
Dongguan Chipsen Electronics Technology Co., Ltd.
Global Transformer Industry Brand Supplier
Verified Supplier

1 Years
Home > High Frequency LLC >

15A Low Profile EQ40 High Frequency LLC Planar Transformer For DC-DC Converter

Product Categories
Dongguan Chipsen Electronics Technology Co., Ltd.
Trust Seal
Verified Supplier
Credit Check
Supplier Assessment
Contact Now

15A Low Profile EQ40 High Frequency LLC Planar Transformer For DC-DC Converter

  • 1
  • 2
  • 3

Certification : ISO9001:2015, ISO14001:2015, IATF16949, UL/cUL, ROHS, REACH, CQC

Output Power Range : 100 W – 300 W (topology dependent)

Model Number : EQ40

Operating Frequency : 20 kHz – 150 kHz (typical)

Payment Terms : T/T

Withstand Voltage : Hi-Pot 3000 VAC / 1 min

Price : US$0.60-1.5

Insulation Class : Class B (130 °C) / Class F (155 °C)

Supply Ability : 10,000,000pcs/month

Wire Type : Enameled copper wire / TIW (Triple Insulated Wire) / Litz wire

MOQ : 100pcs

Delivery Time : 3~4 Weeks

Input / Output Voltage : Input AC 110 V / 220 V; Output 5 V / 12 V / 24 V / 48 V (customizable)

Certification & Compliance : RoHS & REACH compliant; UL / VDE recognized materials; ISO 9001 / IATF 16949

Brand Name : Chipsen

Core Material : MnZn Ferrite — PC40 (PC44 / DMR44 optional)

Packaging Details : Carton 1: 25.5 X 21.5 X 21cm. Carton 2: 43.5 x 24.5 x 21 cm

Application : Smart home power system, SMPS, LED driver, DC fast charging, AI rack power, PV inverter, OBC, UPS

Place of Origin : China

Bobbin & Pin Configuration : Vertical 6+6 pins; Bobbin 45.4 × 36.8 × 19.8 mm, pin pitch 5.0 mm, parallel distance 39.0 mm for reference

Contact Now

15A Low Profile EQ40 High Frequency LLC Planar Transformer for DC DC Converter
Product Overview

The EQ40 High Frequency LLC Planar Transformer is a low-profile, 15A high-current magnetic component engineered for DC-DC converters and LLC resonant topologies. Built on an EQ40 ferrite core with copper foil windings instead of conventional round magnet wire, this planar transformer delivers a flat, space-saving profile with excellent thermal performance — ideal for power designs where board height is the most constrained dimension.

Manufactured under a UL Recognized file (No. E332338), each unit features a shielded metal housing and epoxy potting at the base for mechanical stability, EMI suppression and vibration resistance.

Key Features
Feature Benefit to Your Design
Copper Foil Winding Lower AC resistance, reduced skin and proximity effect at high frequency; higher current density in a smaller footprint
Low Profile Planar Structure Fits 1U power shelves, slim adapters and high-density DC-DC modules where height is limited
EQ40 Ferrite Core Larger effective cross-section than EQ28 / EQ33 — supports higher throughput power with stable inductance
Optimized for LLC Topology Controlled leakage and magnetizing inductance for soft-switching (ZVS) efficiency
Shielded Metal Housing Suppresses EMI radiation and improves thermal dissipation
Epoxy Potting Base Protects terminations against vibration, moisture and mechanical shock
UL Recognized (E332338) Verifiable file number that simplifies your end-product safety approval in North America
PCB Through-Hole Flat Pins Robust mechanical mounting and low contact resistance for high-current paths
Technical Specifications
Parameter Specification
Model No. MTEQ40-450-17235
Core Type EQ40
Core Material MnZn Ferrite
Winding Type Copper Foil
Rated Current 15 A
Operating Frequency 100 kHz ~ 500 kHz
Output Power Customised
Primary Inductance (Lp) Customised
Leakage Inductance (Lk) Customised
Turns Ratio Customised
DC Resistance (DCR) Customised
Hi-Pot (Withstand Voltage) Customised
Insulation Class Class B / F / H
Operating Temperature -40 °C ~ +125 °C
Dimensions (L * W * H) Customised
Mounting Type PCB Through Hole
Certification UL Recognized Component, File No. E332338; RoHS Compliant
Customization Turns ratio, inductance, pin configuration and housing available to your drawing
Applications
  • DC-DC converters and isolated power modules
  • LLC resonant and phase-shift full-bridge power supplies
  • Server power supplies and AI rack power systems
  • EV on-board chargers (OBC) and DC fast charging
  • Photovoltaic (PV) inverters and energy storage systems
  • Telecom rectifiers and industrial SMPS
  • LED drivers and high-density adapters
Why Choose Us
  • UL Recognized manufacturing (File No. E332338) — a verifiable file number, not a vague claim.
  • Full customization — send us your schematic, turns ratio, inductance and pin-out; we build to your drawing.
  • 100% electrical testing before shipment: inductance, turns ratio, DCR and Hi-Pot.
  • Sample support — small-batch prototyping available before mass production.
  • Engineering feedback — our team reviews your LLC parameters and advises on core and winding trade-offs.
FAQ
Q1: Can the turns ratio and inductance be customized?

Yes. Turns ratio, primary and leakage inductance, pin configuration and housing can all be built to your specification. Please provide your drawing or converter parameters.

Q2: What is the advantage of copper foil over conventional magnet wire?

Copper foil reduces AC resistance caused by skin and proximity effects at high frequency, allowing higher current handling in a lower-profile package with better heat spreading.

Q3: Why choose a planar transformer for an LLC converter?

Planar construction gives highly repeatable leakage inductance from unit to unit, which is critical for LLC resonant tanks, while the low profile suits high-density board layouts.

Q4: Is the UL file number verifiable?

Yes. This transformer is produced under UL File No. E332338, which can be checked directly in the UL online certification directory.

15A Low Profile EQ40 High Frequency LLC Planar Transformer For DC-DC Converter

Product Tags:

15A planar transformer

      

EQ40 planar transformer

      

DC Converter high power planar transformer

      
Wholesale 15A Low Profile EQ40 High Frequency LLC Planar Transformer For DC-DC Converter from china suppliers

15A Low Profile EQ40 High Frequency LLC Planar Transformer For DC-DC Converter Images

Inquiry Cart 0
Send your message to this supplier
 
*From:
*To: Dongguan Chipsen Electronics Technology Co., Ltd.
*Subject:
*Message:
Characters Remaining: (0/3000)
 
You May Like