Littelfuse Multipulse SIDAC Optimizes Halogen Lamp Ignition Circuit Design

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Photocoupler

Littelfuse has introduced the Kxxx1G L-Series Multipulse SIDAC, a thyristor power control device designed for 220-240V AC line installation. Thyristors, when used in conjunction with capacitors and transformers, produce multiple high voltage pulses that are required to illuminate a metal halide bulb. These new devices offer designers of metal halide lamp circuits the advantages of higher pulse voltages with lower switching losses and higher tolerance to input voltage variations, compared to the company's previously introduced Kxxx1G devices. Longer than the pulse duration.

Compared to competing products, the Kxx01GL series offers lower switching losses and therefore higher pulse voltages for pulse-start type ignition circuits. The Kxxx1G L-Series multi-pulse SIDACs are available in three different versions for greater design flexibility, while other manufacturers offer only two versions. The Kxxx1GL series has been modified for turn-on functions and reduced switching losses to meet the latest ignition circuit design, so these new devices are capable of producing pulse voltages that are at least 20% higher than the earlier Kxxx1G series.

Typical applications for the Kxxx1GL series include trigger circuits for metal halide lamps in large and medium metal halide lamp units, such as for gyms, street lighting, and stadium lighting.

"Our latest series of multi-pulse SIDAC thyristor power control devices provide the best ignition performance for designers of halogen control circuits," said Koichiro Yoshimoto, thyristor business development manager. "They are also able to provide higher tolerance to AC power input voltage variations that are prevalent in developing countries."

The Kxxx1GL family of multi-pulse SIDACs offers the following key features and benefits:

Features and features

? Lower switching losses
? More stringent corner/trigger voltage (VBO) control
? Lower dynamic holding current (IH)
? Generate at least three pulses per AC half cycle

Features

? The generated pulse voltage is increased by at least 20%
• Provides better operating tolerances for common AC input voltage changes in developing countries
? Longer high voltage pulse duration
? Ideal for metal halide lighting applications

Availability

The Kxxx1G series of multi-pulse SIDACs are available in 1000 or 5000 packs in bulk and tube. Large orders can now be requested from authorized Littelfuse distributors around the world. For more information on the Kxxx1GL series, please visit: http://datasheet.eepw.com.cn/datasheet/show/id/3120881.