Upgraded preamplifier circuits for IR remote control applications

Vishay Intertechnology, Inc. has upgraded its VSOP383xx series of preamplifier circuits for IR remote control applications in consumer products with the new Cyllene 2 IC. Offered in the 2mm x 2mm x 0.76mm QFN package, the improved solutions provide drop-in, plug-and-play replacements for existing devices in the series while delivering a wider supply voltage range from 2V to 5.5V, 37% higher dark-ambient sensitivity, and enhanced performance under strong DC light and Wi-Fi noise.

With their low current consumption over a wider voltage range in a compact package, the series preamplifier circuits increase battery life and save space in mobile devices. Upgrading the components with the company's latest in-house IC technology assures its customers' long-term availability of the products, with decreased lead times. As drop-in replacements for existing solutions – with no mechanical differences and similar electrical characteristics – the devices help save costs by stopping the necessity for PCB redesigns.

The preamplifier circuits are designed to be employed with a photodiode for IR remote control in televisions, soundbars, video game systems, set-top boxes (STBs), audio equipment, and more. For the remote control function in these products, the devices supply increased robustness against disturbances from different kinds of lamps and provide high immunity against ripple noise on the supply voltage. Also, with less susceptibility to EMI from 2.4GHz and 5GHz frequencies – which can cause unwanted output pulses – the solutions can be placed near Wi-Fi antennas for improved design flexibility, while their robustness under bright sunlight allows outdoor use.

RoHS-compliant, halogen-free, and Vishay Green, the devices are available with carrier frequencies of 36kHz (VSOP38336) and 38kHz (VSOP38338).