111, 112, 113, 114 Families Features

Different sizes drive and pulse transformers based on toroidal cores. Characteristics of these components are quite different, because several magnetic core materials can be used and different windings distribution can be chosen. Ferrite core is the cheapest choice for high frequency applications. Alternatively, more expensive magnetic materials are available, based on metallic lamination, even amorphous, or nanocrystalline materials. Those laminated materials have much higher values of saturation flux density (compared to ferrite materials), that allows to reduce dimensions especially for applications switching at low frequency values (some tens of  kHz), and a much more stable behaviour with temperature, so they are preferred in case of critical environment conditions. From the construction's point of view, there are many different ways to arrange windings, but we can consider basically two main kinds of winding layout with complementary characteristics, the multifilar style and the separated sectors style. The aim of the multifilar winding process is to achieve low leakage inductance values, in order to get very short rise times but, on the other hand, the coupling capacity gets very high values; it is used mainly for low working voltage applications as the isolation is guaranteed entirely by the isolating covering material of the wires. You can get very similar characteristics, even by placing the windings one above the other and not all together in parallel. The separated sectors winding style is preferable for high working voltage applications, as the isolation is guaranteed not only by the wires but also by other insulating materials between the windings. This style is characterized by low coupling capacity and high leakage inductance. They are tipically used in IGBTs, power MOSFETs and BJTs high frequency firing or in lower frequency applications with Thyristors and Triacs. Standard versions are available with one or two secondary windings.
Toroidal components generally have very good technical features but, on the other hand, the production process is by nature a one-by-one building style, that cannot be made automatically, and this is the reason why the final cost is much higher if compared with the components based on linear winding process.

          PREFERRED SOLUTION
 
Code n Vt [μVs] Imax [mA] tr [μs] Rc [Ω] Ck [pF] Uis [Vrms] Up [Vrms] Drawing
TI 111010 1 : 1 200 400 1 27 160 380 2000 111A
TI 111020 1 : 1 : 1 200 400 1 27 160 380 2000 111B
TI 111030 1 : 1 200 1000 1 10 110 380 2500 111A
TI 111040 1 : 1 : 1 200 1000 1 10 110 380  2500 111B
          
Code n Vt [μVs] Imax [mA] tr [μs] Rc [Ω] Ck [pF] Uis [Vrms] Up [Vrms] Drawing
TI 112010 1 : 1 300 800 1 15 210 380 2500 112A
TI 112020 1 : 1 : 1 300 800 1 15 210 380 2500 112B
TI 112045 2 : 1 : 1 400 2000 1 10 130 380 2500 112B
TI 112130 1 : 1 500 2000 1 15 70 500 4000 112A
TI 112140 1 : 1 : 1 500 2000 1 15 70 500 4000 112B
          
Code n Vt [μVs] Imax [mA] tr [μs] Rc [Ω] Ck [pF] Uis [Vrms] Up [Vrms] Drawing
TI 113115 3 : 1 : 1 350 2500 1 4,7 80 380  3100 113B
TI 113119 3 : 1 350 2500 1 4,7 80 380  3100 113A
TI 113130 1 : 1 500 2000 1 10 60 500 4000 113A
TI 113140 1 : 1 : 1 500 2000 1 10 60 500 4000 113B
TI 113145 2 : 1 : 1 500 2000 1 10 80 380 3100 113B
TI 113150 1 : 1 1000 2000 1 10 100 500 5000 113A
TI 113160 1 : 1 : 1 1000 2000 1 10 100 500 5000 113B
          
Code n Vt [μVs] Imax [mA] tr [μs] Rc [Ω] Ck [pF] Uis [Vrms] Up [Vrms] Drawing
TI 114050 1 : 1 1000 1500 1 8 250 380 3100 114A
TI 114060 1 : 1 : 1 1000 1500 1 8 250 380 3100 114B
TI 114065 2 : 1 : 1 1000 2000 1 8 150 380 3100 114B
TI 114070 1 : 1 2000 2000 1 8 230 380 3100 114A
TI 114080 1 : 1 : 1 2000 2000 1 8 230 380 3100 114B

   

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