TME puts the spotlight on optoelectronic components

In addition to LEDs and LED displays by Liteon, distributor TME has announced a variety of optoelectronic components.

The components are made for galvanic isolation up to the high kV range by enclosing a transmitting LED and a phototransistor in a single package for the signal to be transmitted optically between them. For use in drivers and communication devices to protect from interference, voltage spikes or other occurrences that can occur on the mains supply, telecommunication line or inductive loads.

According to the distributor, the durability of the optocouplers and optotriacs enable the Liteon range to be used in circuits for both industrial and consumer (audio-video and white goods) devices.

Among the range available are the LTV-844S transistor output optocouplers. These four-channel optocouplers are available in a gullwing package for surface mount assembly. The current transfer ratio (CTR) ranges from 7%-600% to meet a range of applications from sensors to drivers. Isolation volage is from 0.5kV-5kV.

TME also offers two and single-channel optocouplers in DIP4, DIP6, DIP8, DIP16 – through hole and surface mount – packages.

Other optocouplers available from the distributor can withstand collector-emitter voltage (VCEO) from 20V-300V.

Darlington transistor output optocouplers are also in the company’s linecard, characterised by higher current amplification (i.e.CTR as high as 2000%), requiring as little as 1mA, although switching frequency is reduced to a rise time of 60µs. Parameters can be adjusted via the base terminal connected to the base of output transistor (VB). This base terminal can be also used as a feedback loop.

In addition to high-speed optocouplers in DIP8 packages, TME also offers Liteon’s drive optocouplers for IGBTs.The LTV-3120 (pictured) has maximum output current of 2.5A and the LTV-340, which is designed for faster components, and a reduced current of 1A, for direct control of power transistors. They are compatible with most 1200V/100A IGBTs. The LTV-3120S drive optocouplers are available in an SMD package and can withstand output currents up to 2.5A.