LYT4315E is a high-performance primary side controller from Power Integrations for offline LED drivers. It offers improved power factor correction and LED dimming control. The IC uses peak current control for improved efficiency compared to traditional voltage-mode LEDs. Through its peak current control method, power factor correction (PFC) is improved to greater than 0.9, enabling compliance with international SELV specifications including UL8750, EN61347-1 and EN61347-2-13. In addition, other features such as auto-restart, soft start, auto-dim, open circuit detection, current limit and brown-out protection are all included in the device.