Electronic Design

Optocouplers Accept Low Input Current

Featuring low-input drive currents of 1 mA and 5 mA, the company’s latest optocouplers with phototransistor output in DIP-4, SSOP-4 half-pitch miniflat, and SOP-4L long miniflat packages provide reliable isolation for human and equipment safety. The VO617A and VO618A devices, available in the DIP-4 package, offer an isolation voltage of 5 kVRMS for switch mode power supply applications. A current transfer ratio (CTR) of 40% to 320% is achieved for the VO617A at input drive current of 5 mA and at 1 mA for the VO618A. Option 6 offers a creepage distance of ≥ 8 mm. The VOL617A and VOL618A optocouplers come in a 2-mm high SOP-4L package with ≥ 8 mm creepage distance and an isolation voltage of 5 kVRMS. Optimized for AC adapter applications, the VOL617A and VOL618A have a CTR range of 40% to 320% at an input drive current of 5 mA and 1 mA respectively. The VOS618A and VOS628A, in SSOP-4 packages with an isolation voltage of 3,750 kVRMS, are suited for programmable logic controller and industrial automation applications. These devices have a CTR range of 63% to 320% at a low input drive current of 1 mA. Prices start at $0.072 each/10,000 for the VO617A and VO618A. VISHAY INTERTECHNOLOGY, INC., Malvern, PA. (619) 336-0860.

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