Vishay Intertechnology, Inc. introduced five new 10 MBd high-speed optocouplers that provide low power consumption to save energy in industrial applications. Featuring a wide voltage supply range of 2.7 V to 5.5 V and an open collector output, the single-channel VOH260A, VOIH060A, and VOWH260A, and dual-channel VOH263A and VOIH063A enable usage with low voltage microcontrollers and I²C and SPI bus systems. 

Offered in DIP-8, SMD-8, and SOIC-8 packages, the Vishay Semiconductors devices released today utilize a highly efficient input LED coupled to an integrated photodetector logic gate with a strobe output. The optocouplers combine a low supply current of 5 mA maximum per channel with a low typical turn-on threshold current of 2 mA, which simplifies designs by eliminating the need for an additional driver stage for a direct microcontroller connection. 

The VOH260A, VOIH060A, VOWH260A, VOH263A, and VOIH063A are ideal for data communications, high-speed A/D and D/A conversion, level shifting, and providing high voltage safety in automation equipment, motor drives, and tools. The devices feature an internal shield that provides a guaranteed common mode transient immunity (CMTI) of 15 kV/μs minimum. Combined with their low turn-on threshold and supply current, this makes the optocouplers ideal for noise isolation and breaking up ground loops in these applications. 

The RoHS-compliant devices offer a maximum rated withstand isolation voltage up to 5000 VRMS and provide isolation distances from 5 mm to 10 mm to cover a wide range of requirements, including those of applications with working voltages exceeding 1000 V. 

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The Automotive Grade device released today consists of an AIGaAs infrared LED (IRLED) irradiating an isolated feedback diode and an output PIN photodiode in a bifurcated arrangement. The VOA300’s feedback photodiode captures a percentage of the LED’s flux and generates a control signal that is used to servo the LED drive current, while the output PIN photodiode produces an output signal that’s linearly related to the servo optical flux created by the LED. The time and temperature stability of the input-output coupler is ensured by using matched PIN photodiodes that accurately track the output flux of the LED.

The VOA300’s single-ended output can be directly connected to an amplifier stage or an analog-to-digital converter. The optocoupler is designed for galvanically isolated current and voltage measurement in electric vehicles (EV), including on-board chargers (OBC), traction inverters, and DC/DC converters. The device provides reliable and fast data transfers at the rate of 1.4 MHz for these applications, while its fast response time enables quick detection of voltage and current ripples for battery cut-off mechanisms (eFuses) that protect passengers and vehicles.

The linear optocoupler offers low input-output capacitance of 1 pF typical, high gain linearity of ± 0.25 %, and low power consumption of < 15 mW. In addition, the device features an operating temperature range up to +125 °C, making it suitable for applications in harsh industrial environments. The optocoupler is RoHS-compliant, halogen-free, and Vishay Green.

Samples and production quantities of the VOA300 are available now, with lead times of 10 weeks.

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Galvanic isolation of low power control circuits from high power circuits is an important safety aspect in many applications. Optocouplers protect against interference and overvoltage in power supplies, chargers, computers, microprocessors, sequence controllers, programmable logic controllers, measuring devices, and other applications. In designing the optocouplers, Würth Elektronik has chosen the coplanar package with a constant isolation gap. This guarantees perfect isolation up to 5000 V. High-quality silicone and polymer materials provide for 100% internal reflection and ensure a stable CTR over the entire temperature range. Würth Elektronik optocouplers feature fast switching times and high DC transmission ratios even in low current operation. The copper lead frames ensure optimal solderability and reliable assembly in the application.

Würth Elektronik optocouplers are available from stock in all package designs and CTR bindings. Free samples are available. Further information on service life and design recommendations for extending the service life of Würth Elektronik optocouplers can be found in Application Note ANO006.

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