Galvanic isolated optocoupler provides current transfer ratio up to 600%
Providing low-power signal isolation for battery management and 48V power domains, the Vishay Intertechnology VOMA618A optocoupler offers benefits for automotive and high-reliability industrial systems.
The VOMA618A series of optocouplers brings power solutions for noisy supplies and mixed-voltage domains. The optocoupler supports galvanic and noise isolation for signal transmission between electrically separated circuits. The VOMA618A features a high collector emitter voltage of 80V, which offers current transfer ratio up to 600% at just 1mA input current, alongside low coupling capacitance of 1.2pF to help minimize noise coupling across the isolation barrier.
The optocoupler combines a gallium aluminum arsenide (GaAlAs) infrared emitting diode optically coupled with a silicon planar phototransistor detector. The high current transfer ratio at low input current helps to reduce LED drive requirements, supporting power-sensitive monitoring and control circuits that still need robust isolation.
The VOMA618A provides a maximum withstanding isolation voltage of 3750Vrms according to UL 1577, with creepage and clearance distance at least 5mm. It also supports safety insulation requirements with specified maximum transient isolation voltage of 6000V and maximum repetitive peak isolation voltage of 707V, helping designers to meet isolation targets in compact power control layouts.