LYT4227E

The product features

• Constant current (CC) regulation is better than + / - 5%
• Suitable for low input voltage application of power factor correction (PFC) technology
• Silicon controlled dimmer and dimmer option

instructions

High performance, internal integrated drive circuit, control circuit and switch tube

LYTSwitch - 4 series of products can be designed with high power factor of an off-line LED drive, make it easy to meet the international standard of THD and harmonic requirements.Output current pass strict adjustment precision can achieve better than + / - 5% of the constant current¹.In a typical applications, the efficiency can be easily reached more than 92%.

Support various types of SCR dimmers

LYTSwitch - 4 series of products can be for the front and back porch thyristor dimmer application provides excellent conductivity (electrical) performance.That would make the driver with dimming range is wider and faster startup, even under low conduction Angle on electricity as well as well.In addition, it also has a major light ratio and low starting current "light".

Low project cost and long service life

LYTSwitch - 4 IC has a high level of integration, the use of the primary side of the control technology, optical isolator and reduce quantity of yuan.So you can use low cost single printed circuit board.To also integrated into the single-stage PFC and CC function also helps to reduce cost and improve efficiency.Switching frequency of 132 kHz allows the use of smaller, low-cost core.

The LYTSwitch - 4 series LED drive device without using the primary side of large capacity aluminum electrolytic capacitor.This means that the service life of the drive can be greatly extended, especially for the light bulbs and other high temperature applications.

Other features

• Quick start
  • Maximum brightness < 250 milliseconds
  • Up to 10% brightness time < 1 second
• High power factor (0.9) >
• Easily meet EN61000-3-2 requirements
  • THD can be less than 10% after optimization design
• Efficiency up to 92%
• The 132 kHz frequency switch design can use smaller core