Optoelectronics

Wonderland’s current pwm to voltage converter mini-project is to interface a modern grblHAL cnc board with a late 1990s era thyristor-based motor control board in an milling machine. The board appears to be both sophisticated and flexible – for example, it can use armature voltage or a tachometer for speed feedback, it has several different input options to set the ...

Once more opto-isolators are to be seen in Wonderland. The aim was to see if the faster photodiode types can operate quickly in common collector mode. They consist of an infra-red led and a fast npn transistor with its base connected to a co-packaged reverse-based photodiode. And there are layers and layers of subtly in their operation. The conventional circuit ...

Optoelectronic components play a key role in circuit isolation, control modules, and communication applications. Therefore, manufacturers like Everlight rarely limit their range to just LEDs… Below we present the offer of Everlight brand optoelectronic components. This Taiwanese manufacturer boasts over 40 years of experience in its industry. Everlight, as a highly specialized supplier, targets its offer to customers seeking universal, ...

Toshiba has squeezed a photo relay with 1,500V output mosfets into an 8 x 10mm surface-mount package. TLX9161T is aimed at electric vehicle batteries, and turns on or off in a maximum of 1ms. Its characteristics are tuned for “modern automotive battery and fuel-cell control and battery management systems, which monitor voltage and detect mechanical relay sticking and ground faults”, ...

Toshiba is aiming at 800V electric vehicles with an SO16 photo-relay with 1.8kV output mosfets. “Photo-relays commonly used in battery systems must withstand a voltage of approximately twice the system voltage, therefore, an output withstand voltage of over 1,600V is required for an 800V system,” according to the company. “Toshiba’s TLX9165T meets and exceeds this requirement.” The high-voltage mosfets inside ...

Toshiba has created a ~5A opto-isolated mosfet and IGBT gate driver in a six-pad SO6L package, half the size of an 8pin DIP package, and “meets the reinforced insulation class requirements of international standards”, it said. Called TLP5795H, it has an internal LED, photodiode and a rail-to-rail output driver typically capable of -4.5 and +5.3A with a 15 – 30V supply ...

Visitor registration is open for CIOE 2025. It is the chance to connect with over 3800 industry players. The event brings together a wide array of cutting-edge technologies and industries, showcasing optoelectronic chips (lasers/optical detectors, sensors), semiconductor materials, and semiconductor manufacturing/packaging and testing equipment. Running 10 – 12 September 2025, the venue is the Shenzhen World Exhibition and Convention Center, ...

Toshiba has created a pair of highspeed photo relays for pin-switching in semiconductor test equipment. “Improved infrared LEDs and optimised photodiode arrays in these models enable switch-on times to be reduced to 150µs while maintaining signal quality,” according to distributor Rutronik, which is stocking the parts. “In addition, the S-VSON4T package saves space on the circuit board.” – it measures ...

CEA-Leti revealed GaN micro-LED displays incorporating an array of organic photodetectors. “MicroLED’s high radiance allows us to free up space on the display panel to incorporate photodetectors,” said Leti’s project leader Michaël Pelissier. “Demonstrating the integration of microLEDs with photodetectors paves the way for multi-functional displays that combine imaging, gesture recognition and even biometric scanning.” The display-sensor was described in ...

Toshiba has introduced an opto-isolated SiC gate driver, that includes an active Miller clamp to tame self-turn-on behaviour in the driven device. Named TLP5814H, it is a “gate driver photocoupler suitable for driving silicon carbide mosfets in industrial equipment like inverters, uninterruptible power supplies and photovoltaic inverters which experience harsh thermal environments”, according to the company. “The Miller clamp circuit ...