Troidal Coil Inductors are made from the iron powder core with either one or two coils. As small magnetic leakage, a low wastage and Low profile, high power factor correction, they are widely applied in electronic ballast or other switch power supply.
Active PFC offers better THD and is significantly smaller and lighter than a passive PFC circuit. To reduce the size and cost of passive filter elements, an active PFC operates at a higher switching frequency than the 50Hz/60Hz line frequency.
Active PFC functions include:
-Active wave shaping of the input current
-Filtering of the high frequency switching
-Feedback sensing of the source current for waveform control
-Feedback control to regulate output voltage
Buck, boost, flyback and other converter topologies are used in active PFC circuits.
Key Specifications/Special Features:
-Selection of materials: amorphous magnetic, Nan crystalline ring, Kool toroid
-High current, horizontal or vertical mount
-High saturation flux density
-High power factor correction
-Low profile and low weight
-Less flux leakage and beat
-Low radiation and core loss
-Precise inductance
-Operating temperature: -55 to 105°C
-Power: 200, 250, 300 and 500W
-100V/230 50Hz
-Inductance Range: 1 to 1000 uH
-PF value: greater than 98%
-Tested at 100 kHz, 0.1Vrms inductance of uH 10%
-DC current at which the inductance drops 10% (type) from its value without current
-Electrical characteristics at 25 degrees Celsius
-Insulation: Class B (130°C), Class F (155°C), Class H (180°C), Class N (200°C) and Class R (220°C)
-Certifications: UL, CQC and CE
-Excellent utilization of electricity, good for environmental protection
-Customized specifications are accepted
Applications:
-Frequency Power
-UPS
-EMI/RFI filters
-Switching power output and smoothing circuits
-Used as choke coil for high frequency SMPs
-Countermeasure against spike ripples
-DC/DC converters
-IP and OP devices
-Notebook computer
-Air conditioning
-Digital TV
-Battery power equipment
-Power supply of all types of household appliances
-Switching power supplies
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