| Title |
A Study on Characteristics Analysis of Winding Method for Common-Mode Choke |
| Authors |
Jae-Sun Won ; Hee-Seung Kim ; Jong-Hae Kim |
| Keywords |
common-mode choke; high frequency model of cm choke; parasitic capacitance; impedance characteristic; LED-TV SMPS |
| Abstract |
This paper presents the intra capacitance modeling according to the winding method and section bobbin for CM choke capable of the EMI attenuation of broad bands from lower frequency bands to higher frequency bands and high frequency type common-mode choke capable of the EMI attenuation of high frequency band used in the EMI Block of LED-TV SMPS. In case of high frequency type CM choke, it can be explained the parasitic capacitance of A type and section bobbin type winding methods among them is much smaller than the other. The first resonant frequency of the proposed CM choke tends to increase as the parasitic capacitance becomes small and its impedance characteristics also show improved performance as the first resonant frequency increases. In the future, the CM chokes of high frequency type show it can be practically used in not only LED/LCD-TV SMPS but also several applications such as LED Lighting, Adapter and so on. |