Power

Common mode chokes enable streamlined electronic designs

29th November 2016
Alice Matthews

With increasing power densities needing to be supported in modern electronics hardware, ensuring adequate EMI suppression is of greater importance than ever. As well as being fully operationally effective, common mode chokes must also exhibit compact form factors in order to address increasingly acute space constraints. 

Solid State Supplies offers engineers new chokes from Pulse Electronics with reduced volumetric dimensions.

Measuring 32.0x12.6x10.0mm and 42x27x46mm respectively, the PH9455xNL and PA441xNL series can both deliver high levels of performance while being significantly smaller than competing devices on the market, according to the company. This capability stems from the use of nanocrystalline cores, which results in a quadrupling of the impedance over conventional ferrite core chokes of the same dimensions and winding arrangements. Engineers are thus given plenty of scope for scaling down to lower profile, smaller footprint components without any compromises needing to be made.

The PA441xNL series’ inductance range covers 14mH (at 8A) to 35mH (at 5A), while the PH9455xNL series has an inductance range that spans 1.00mH (at 22.0A) to 82.0mH (at 3.0A). Both series exhibit a 1500Vrms dielectric strength. The common mode noise rejection of these components means they are optimised for EMI filtering tasks in AC/DC, DC/DC and DC/AC power sources where limited available space is available, as well as in solar inverters and motor drives. They also offer temperature stability.

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