MINA INC.

A PLANAR MAGNETIC COMPANY

Mina has been designing, developing, manufacturing and marketing custom planar magnetic since 1992 for companies manufacturing commercial, industrial and military grade switch mode power supply and Uninterruptable Power Planar Magnetic Transformer Supply. Mina planar transformers are intended for aerospace, military, industrial and commercial applications. Mina process for planar magnetic products development meets or exceeds military standards. Our application engineers are highly skilled in all switch mode power conversion topology; hence, they will provide technical assistance free to our customers in their switch mode power conversion development effort.

Very low leakage inductance
Excellent repeatability of performance
Excellent and very high mechanical integrity
Efficient and very easy mechanical assembly of transformers and inductors that translate to a very low cost to customers
Optional retrofit of any existing transformer or inductor planar or conventional
Very high power and current density

No gluing of two separate cores to achieve high power and current density
High current density is achieved by a new process that reduces
winding area resistance
Superior thermal characteristics
Very high efficiency
Very high reliability
Very low profile
Vertical mounting that saves space
Very high power density
Very high mass/volume efficiency
Very high power efficiency
Easy to assemble unto a substrate without the need for additional mounting component
All Mina planar transformers are provided with mounting pins/studs that provide easy mounting unto a substrate

Mina planar transformers are shielded hence radiated EMI is drastically minimized. Mina utilizes a process in the synthesis and fabrication of planar magnetic that is either lower or comparable in cost to conventional wound transformers and inductors but definitely lower than any competitor’s planar magnetic.

Planar Transformer, Planar Inductor, Current Sense Transformer, Gate Drive Transformer, and Pulse Transformer.

CONSTRUCTION DESIGN

Planar transformer design unlike conventional wire wound transformer design begins with overall desired size, total output power, and the operational frequency drive, turn ratio, primary and secondary winding temperature rise and resistance.
All planar transformers including: planar transformer - flyback converter (either single ended, double ended or active clamp) topology, planar transformer - forward converter (either single ended, double ended or active clamp) topology, planar transformer - push-pull converter topology, planar transformer - half-bridge converter topology, and planar transformer - full-bridge converter topology are with minimal leakage inductance and excellent coupling between primary and secondary side. Further Flux strap is added to minimize radiated EMI. Using flat conductors as against round conductors also reduces EMI.
Planar transformer - gate drive also designed and constructed as the power planar transformers, they transmit signal across the isolation boundary without attenuating the voltage, current, duty cycle or frequency of either high side or low side. The planar gate drive transformers are extremely rugged, extremely reliable and very easy to integrate into any circuit compared to any integrated circuit gate driver. It never fails.
Planar transformer - current sense also designed and constructed as the power planar transformer and they all accurately measure and transmit the primary current.
Planar inductors – Power Factor Correction (PFC) and power supply output filter inductors are designed and constructed as the power planar transformers.

QUALTY TESTING

Mina test 100% all planar transformers. We use several Voltech 3600 to do all testing required. The Voltech 3600 gives us the flexibility to measure inductance, turns ratio's, resistance of coils, leakage, and hi-pot.

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