Hybrid emitter switched bipolar transistor is ISOTOP
27 August 2003Analogue, Mixed Signal, LSI
Products & Solutions
L. Difalco, bipolar technical and new development marketing, ST MicroElectronics
ST MicroElectronic's new family of emitter switched bipolar transistors is being launched with the introduction of the high power STE50DE100 housed in the screw-mounted ISOTOP package. It is aimed primarily at induction heating, welding equipment and high-end PFCs for audio amplifiers. With this device the power level has been substantially shifted to as high as 2,5 kW. Enlarging ST's power actuator product range means customers will be able to convert existing problems into cost-effective, high performance solutions.
Figure 1. STE50DE100’s RBSOA shows the switch-off with a cross point of up to 35 A/1000 V
Bipolar transistors have historically been, a power actuator for switching applications, working at low frequencies (<70 kHz). Their benefits are low VCesat (low conduction losses). However, drawbacks include: slow switching speed, high current (power) output needed from the driver (PWM); and difficult fine tuning driving circuit is required.
ST has long been producing state-of-the-art devices with both these technologies. Many patents have been released in the past years. With the emitter switching technology/topology, a new family of devices combining all the strengths and eliminating the drawbacks of both bipolar and MOSFET technologies, will be on the market.
Table 1 shows a summary of the most meaningful parameters in the STE50DE100 datasheet.
Table 1
Safe switching square RBSOA
Some of the tested application topologies could make the power switch operate in hard switching conditions, with possible critical cross points. This requirement does not match with the classical bipolar RBSOA (reverse bias safe operating area). Thanks to the topology itself and the way in which the device is realised, it has surprisingly been possible to achieve a square RBSOA, which greatly improves the device's performance in terms of safe switching.
As an example of an application, the very strict electrical requirements of induction heating are easily met by the STE50DE100. The basic induction heating block schematic, together with a single switch common topology is pictured in Figure 2.
Figure 2. Induction heating block schematic
As further proof of the exceptional performance of the STE50DE100, refer to the waveforms in Figure 3, showing the device working in all the critical conditions (turn-on, turn-off and conduction).
Figure 3. STE50DE100 turn-on waveform (above), and turn-off waveform (below)
For more information contact Electrocomp, 011 458 9000, (Value Added Distributor).
Check Point launches open, vendor-neutral MDR services
Information Security News & Events Products & Solutions
New Check Point MDR 360° and MXDR 360° offerings deliver 24/7 managed continuous threat monitoring protection across endpoints, cloud and network environments with built-in identity threat detection and 160+ integrations across hybrid, multi-vendor environments.
Read more...High-performance IMU RS South Africa
Analogue, Mixed Signal, LSI
TDK Corporation has announced availability of the new InvenSense SmartMotion ICM-536xx family of high-performance 6-axis IMUs.
Read more...Secure, modernise and optimise CCTV
Surveillance Products & Solutions
Industrial and commercial organisations are navigating complex digital transformation processes. With SecuVue, companies can bridge the gap between operational technology and information technology for safer, smarter operations.
Read more...Water mist for optimal fire suppression Fire & Instrument Services
Fire & Safety Products & Solutions
Building owners, facility managers and other professionals are seeking fire suppression solutions that can meet the demands of modern buildings and facilities, including reduced water usage and environmental impact, while providing the necessary protection for assets and business operations.
Read more...Smoke 'em out
Fire & Safety Products & Solutions
The moment an intrusion is detected, Smoke Screen’s high-powered fog cannons activate, flooding the area with a dense, harmless fog that reduces visibility to near zero within seconds.
Read more...IoT innovation in water mist fire protection
Fire & Safety Products & Solutions IoT & Automation
Marioff, a provider of water mist fire protection, has introduced an Internet of Things (IoT) solution designed for high-pressure water mist systems, enabling real-time monitoring, smart alerts, and centralised control.
Read more...Advanced fire safety solutions
Fire & Safety Products & Solutions
With fire incidents on the rise, it is crucial to choose fire safety solutions that are proven, reliable, and capable of providing early detection and efficient response.
Read more...New 3dB hybrid couplers Electrocomp
Telecoms, Datacoms, Wireless, IoT
Designed to facilitate the continued evolution of high-frequency wireless systems in various market segments, the new DB0402 3dB 90° hybrid couplers provide repeatable high-frequency performance compatible with automated assembly.
Read more...High-temperature closed-loop MEMS accelerometer RS South Africa
Analogue, Mixed Signal, LSI
This sensor from TDK is a high-temperature MEMS accelerometer with ±14 g input range and a digital interface for measurement while drilling applications.
Read more...Robust series of vertical-mating battery connectors Electrocomp
Interconnection
KYOCERA AVX has further expanded its industry-leading selection of standard battery connectors with the introduction of the new 9155-900 Series 2,5 mm-pitch vertical-mate battery connectors.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version