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High Frequency Toroidal Common Mode Inductor EMI Filter Choke Coil For LED Driver
Place of Origin:
China
Brand Name:
Chipsen
Certification:
UL/CUL/ISO9001/ISO14001/RoHS/Reach/IATF16949
Model Number:
T22
Minimum Order Quantity:
1000
Price:
US$0.15-1.5
Packaging Details:
Carton 1: 25.5 X 21.5 X 21cm Carton 2: 43.5 x 24.5 x 21 cm
Delivery Time:
3-4 Weeks
Payment Terms:
T/T
Supply Ability:
10000000/Month
Inquiry Now
Get A Quote
Specifications
Highlight Features
High Frequency common mode inductor
,Toroidal common mode inductor
,LED Driver common mode choke toroid
Model Number:
T22-Series / CMC-T22
Inductance:
1mH - 50mH (Customizable)
Rated Current:
1A / 2A / 3A / 5A (Customizable)
Core Type:
Toroidal / Ring-type
Core Material:
Ferrite / Nanocrystalline / Mn-Zn
Winding:
100% Pure Copper Wire
Usage:
EMI Filter / EMC Suppression
Certification:
RoHS, REACH, UL Recognized
Product Description
High Frequency T22 Toroidal Common Mode Inductor EMI Filter Choke Coil for Switching Power Supply and LED Driver
T22 Common Mode Toroidal Inductor: The High-Performance Solution for EMI Suppression
Product Introduction
The T22 Common Mode Inductor is a high-precision magnetic filter designed to mitigate electromagnetic interference (EMI) and common-mode noise in power and signal lines. Utilizing a standardized T22 toroidal core (approximately 22mm outer diameter), this component is engineered to provide high impedance across a broad frequency spectrum. It serves as an essential barrier in AC/DC and DC/DC power conversion stages, ensuring that electronic systems comply with stringent global EMC standards such as CISPR and FCC.
| Parameter | Typical Value / Spec |
|---|---|
| Core size | T22 (Toroidal Ring) |
| Dimensions | Approx. OD 23.5mm x H 13.5mm (Incl. Base) |
| Mounting Type | Through-hole PCB Mount (Pin type) |
| Base Material | UL94-V0 Flame Retardant Plastic |
| Inductance Range | 1.0 mH - 50.0 mH (Customizable) |
| Inductance Tolerance | +50% / -30% (Standard for CMC) |
| Rated Current | 0.5 A - 6.0 A |
| Max DCR (Resistance) | 10 mOhm - 500 mOhm (Depends on Inductance) |
| Test Frequency | 10 KHz / 100 KHz / 0.1V |
| Hi-Pot (Isolation) | 1500V - 2500V AC / 1min |
| Core Material | Mn-Zn Ferrite / Nanocrystalline |
| Initial Permeability (ui) | 5000 - 100000 |
| Stray Leakage Inductance | < 1% - 3% of Nominal Inductance |
| Winding Wire | 2UEW / 3UEW High Temp Enameled Copper |
| Insulation Class | Class B (130°C) / Class F (155°C) |
| Operating Temp | -40°C to +125°C (Incl. Temp Rise) |
| Compliance | RoHS, REACH, UL recognized |
Product Features
- High-Permeability Magnetic Cores: Available with premium Mn-Zn (Manganese-Zinc) Ferrite or advanced Nanocrystalline cores to provide maximum inductance in a compact T22 footprint.
- Precision Symmetrical Winding: Features a dual-winding structure where both coils are wound with identical turns and tension, ensuring perfect balance and maximum noise cancellation.
- Broadband Filtering Capability: Specifically optimized to suppress common-mode noise ranging from 50kHz to several MHz, making it ideal for high-speed switching power supplies.
- Robust Insulation System: Incorporates high-grade polyester or polyimide separators between windings to ensure high dielectric strength and prevent internal arcing.
Technical FAQ 1: How does the choice between a Ferrite core and a Nanocrystalline core in a T22 footprint impact high-temperature performance?
Answer: This is a critical design consideration. Mn-Zn Ferrite cores are cost-effective and perform well up to roughly 100°C, but their permeability drops significantly as they approach the Curie temperature. In contrast, Nanocrystalline cores in a T22 size offer significantly higher initial permeability and a much higher Curie temperature (typically >500°C). This allows the T22 inductor to maintain stable inductance and filtering performance even in high-ambient environments like LED drivers or enclosed industrial power modules, often allowing for a reduction in component size without sacrificing filtering efficacy.
Product Applications
- Switch Mode Power Supplies (SMPS): The primary input filter for power adapters, server power units, and desktop PC power supplies.
- LED Drivers: Prevents high-frequency switching noise from polluting the AC grid, ensuring stable and flicker-free lighting.
- Industrial Automation: Protects sensitive PLC and sensor signals from common-mode transients in noisy factory environments.
- Smart Home & IoT: Provides compact and reliable EMI filtering for small connected devices and home appliances.
Technical FAQ 2: Can a T22 common-mode choke provide any differential-mode filtering, and how is "stray leakage inductance" managed?
Answer: Yes. While the primary function is common-mode suppression, every toroidal inductor has a small amount of stray leakage inductance (typically 1% to 3% of the common-mode inductance). This leakage inductance acts as a "bonus" differential-mode filter, which helps reduce ripple current and high-frequency differential noise. In T22 designs, we can intentionally adjust the winding gap or use specialized winding techniques to "tune" this leakage inductance, potentially eliminating the need for a separate differential-mode inductor and saving valuable PCB real estate.
Product Advantages
- Superior Thermal Efficiency: The toroidal ring structure facilitates excellent natural convection. Combined with high-purity copper wire, the T22 ensures a low DC Resistance (DCR) and minimal temperature rise under load.
- Extreme Space Savings: The T22 geometry offers one of the best "inductance-per-volume" ratios in the industry, providing heavy-duty filtering in a profile that fits easily into slim-line enclosures.
- Minimal Magnetic Leakage: Unlike E-core or drum-core inductors, the toroidal shape contains the magnetic flux within the ring, drastically reducing electromagnetic radiation to adjacent sensitive traces.
- High Manufacturing Consistency: Every T22 inductor is tested for inductance balance and dielectric strength, ensuring perfect repeatability for high-volume automated assembly.
Company Strengths
Chipsen Electronics Technology Co., Ltd., established in 2000, is a specialized manufacturer of high frequency transformer, low frequency transformer, toroidal inductor, SMD power inductor, super high current inductor, choke coil and switch. Chipsen has got a good reputation in domestic and oversea markets which include North & South America, Europe and Southeast Asia.
Chipsen possesses a professional management team, as an ISO9001, ISO14001 & IATF16949 audited company, which always commits to producing environmental protection and qualified products. Our products are certified by UL Class B/Class F/Class H, CQC and RoHS, and obtained 21 patents. These achievements mainly come from our strong R&D team, providing various solutions for temperature decreasing, noise cancellation and coupled radiation conductivity.
Our products widely used in various fields of new energy, PV, UPS, Robotics, smart home, security systems, health care and communication.
Vision: To Be Global Transformer Brand Supplier
Mission: Create Values for Customers and Society, Grow with Customers and Staffs
Values: Customer First, Team Cooperation, Embrace Changes, Integrity, Creative & Happy
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