Hybrid emitter-switched transistor reduces power dissipation
31 May 2006
Power Electronics / Power Management
STMicroelectronics hybrid emitter-switched bipolar transistor (ESBT) is designed for use in welding equipment, induction heating systems and power factor correction for audio amplifiers. The STE50DE100 sustains a high collector-source voltage of 1000 V and collector currents of up to 50 A. The four-terminal device is supplied in an industrial screw-mounted Isotop package.
ST has designed this part to combine the strengths and eliminate the drawbacks of both bipolar and mosfet technologies.
Power bipolar technology to date has typically been used in power switching applications at frequencies well below 70 kHz. Its low collector-emitter saturation voltage brings the benefit of low conduction losses. Drawbacks however, include slow switching speeds, the need for high currents from driving circuitry and problems related to fine-tuning this circuitry.
In contrast, mosfet technology is widely used in high-frequency power switching applications. Mosfets' main benefits are high switching speed capability and the need for very low current from its driving circuitry. Drawbacks include higher cost compared to bipolar, and high power consumption during conduction.
By combining the benefits and removing the drawbacks of both technologies, ST says that the STE50DE100 helps reduce the conduction losses to the same level as those of a bipolar part, while offering good performance in high-speed switching at up to 150 kHz as for mosfets.
In addition, thanks to its cascode configuration and dedicated bipolar technology, the device offers a square reverse bias safe operating area, enabling it to work in hard switching topologies.v The rugged isotop allows a very high total power dissipation of 160 W at 25°C. Maximum operating junction temperature is 150°C and the insulation withstand voltage is 2500 V a.c. rms.
Further reading:
Powering Innovation eBook: Changing what’s possible
Power Electronics / Power Management
This exclusive read, entitled ‘Changing what’s Possible,’ delves into how power dense Vicor modules enable many world-changing innovations across various sectors.
Read more...
16-channel multicell battery monitor
Altron Arrow
Power Electronics / Power Management
The ADBMS6830B is a multicell battery stack monitor that measures up to 16 series-connected battery cells with a lifetime total measurement error of less than 2 mV.
Read more...
Reliable redundancy with the Mibbo M3DN Series
Conical Technologies
Power Electronics / Power Management
Designed for use with two parallel-connected power supplies, the M3DN Series allows for true redundancy, making it ideal for mission-critical applications.
Read more...
Automotive power-over-coax inductor
RS South Africa
Power Electronics / Power Management
TDK has launched the ADL8030VA, a high-performance inductor designed specifically for power-over-coaxial applications.
Read more...
Rugged PSU for challenging conditions
Conical Technologies
Power Electronics / Power Management
Built for rugged reliability, the Mibbo MFC Series delivers stable, efficient power in environments where moisture, dust, and temperature extremes are everyday challenges.
Read more...
Enhance SiC device efficiency using merged-pin Schottky diodes
NuVision Electronics
Editor's Choice Power Electronics / Power Management
Silicon carbide (SiC) has advantages over silicon (Si) that make it particularly suitable for Schottky diodes in applications such as fast battery chargers, photovoltaic (PV) battery converters, and traction inverters.
Read more...
15 W power module with wide input range
Brabek
Power Electronics / Power Management
RECOM’s miniature power modules provide 15 W output and operate over a wide input range of 18-264 V AC or 18-375 V DC.
Read more...
Industrial-grade DIN rail PSU
Conical Technologies
Power Electronics / Power Management
The Mibbo MTR960W is a reliable and cost-effective PSU option that delivers a solid 960 W of output power at 24?or 48 V DC.
Read more...
Energy harvesting and Matter for smarter homes
RF Design
Power Electronics / Power Management
Qorvo’s collaboration with e-peas on the Matter Enabled Light Switch marks another significant step in advancing Matter adoption across the IoT industry.
Read more...
3-terminal filters for automotive applications
RS South Africa
Power Electronics / Power Management
TDK has expanded its YFF series of 3-terminal filters for automotive applications to include higher voltages up to 35 V and higher capacitances up to 4,7 µF.
Read more...
printer friendly version