Electronics and Semiconductors

Vishay Intertechnology automotive grade photovoltaic MOSFET driver features integrated turn-off circuit in compact SOP-4 package

12 June 2023

Vishay Intertechnology, Inc. has introduced a new automotive grade photovoltaic metal-oxide-semiconductor field-effect transistor (MOSFET) driver as the first such device to offer an integrated turn-off circuit in the space-saving SOP-4 package. Designed to deliver high performance for automotive applications — while increasing design flexibility and lowering costs — the VOMDA1271 features the industry’s fastest switching times and highest open circuit output voltage.

The integrated turn-off circuit of the optocoupler enables a turn-off time of 0.7 ms typical, which is the fastest for a MOSFET driver in the compact SOP-4 footprint. In addition, the VOMDA1271 provides a turn-on time of 0.05 ms — twice as fast as competing devices — and is the only driver in this package size toSource: Vishay Intertechnology, Inc.Source: Vishay Intertechnology, Inc. offer an isolation voltage of 3750 V and a typical open circuit output voltage of 8.5 V, which allows it to drive a variety of MOSFETs.

The AEC-Q102 qualified device is intended for use in pre-charge circuits, wall chargers and battery management systems for electric and hybrid electric vehicles. To generate the higher voltages needed to drive insulated-gate bipolar transistors and silicon carbide MOSFETs in these applications, two VOMDA1271 optocouplers can be used in series. In addition, the driver enables designers to create custom solid-state relays to replace legacy electromechanical relays in next-generation vehicles.

The optically isolated VOMDA1271 features an aluminum gallium arsenide infrared LED (IRLED), which emits light that is absorbed by a photovoltaic gate array, generating the voltage used to turn on a MOSFET. This construction simplifies designs and lowers costs by eliminating the need for an external power supply. For even greater design flexibility, the device can be driven by a microcontroller’s GPIO pin. The optocoupler is RoHS-compliant, halogen-free and Vishay Green.

Samples and production quantities of the VOMDA1271 are available now, with lead times of eight weeks.

To contact the author of this article, email GlobalSpecEditors@globalspec.com

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