Example of CHT-THEMIS + CHT-ATLAS utilization in a half-bridge isolated gate driver (HADES® Reference Design).

THEMIS and ATLAS, are meant for high efficiency motor drives and power converters. THEMIS and ATLAS are especially designed to drive seamlessly the most advanced power switches, including Silicon Carbide (SiC) MOSFETs and JFETs as well as Silicon IGBTs and MOSFETs. The chipset is the cornerstone of energy-saving, reliable power converters and motor drives. They are part of HADES™, an integrated Gate Driver sustaining high temperature. Therefore, they can be located next to the SiC power switches, reducing the parasitic inductance to a few nH and hence reducing switching losses because of faster transitions. Lower switching losses allow increased switching frequency of power converters, which in turn reduces the size of passive components.
ATLAS features 2 distinct channels capable of sourcing (or sinking) 2A each to the gate of the power transistor, hence 4A total. For applications that require higher power, the solution is scalable and can control up to 5 ATLAS circuits per THEMIS, with a current of up to 20A to drive the gate of the power transistors, which can typically turn on/off SiC transistors in less than 50 ns. A complete set of built-in protection features such as under-voltage lockout, de-saturation detection, soft-shutdown and active miller clamping are included, facilitating the electrical design and reducing the bill of material.
The new chipset THEMIS/ATLAS from CISSOID will find immediate applications in aeronautics, where reduction of weight and size is a must, without compromising the reliability: new generation of electric actuators in replacement of traditional hydraulic actuators, as well as electrical power conversion and generation systems, can immediately benefit from THEMIS-ATLAS. Similarly, in defence, railway, renewable energy and generic industrial applications, the high power density solution enabled by CISSOID is a disruptive technology that will change the way engineers design their power converters and motor drives.

Typical performances:

• Temperature range: -55°C to 225°C
• Scalable sink/source current from 2A to 20A
• Supply Voltage: 5V to 30V
• Capable to drive normally-On and normally-Off power devices
• Available Package: Ceramic SOIC28