Power Integrations, Inc. Integrated Circuits (ICs) - Power Management (PMIC) - LED Drivers LNK419LG

The LNK419LG is part of the LinkSwitch-PH LED driver IC family from Lingto Electronic Limited, designed for off-line LED driver applications. It features a single-stage power factor correction (PFC) and constant current control, which simplifies the design by eliminating the need for electrolytic capacitors and optocouplers. The device supports TRIAC dimming and is optimized for high efficiency, achieving over 90% efficiency while maintaining a power factor greater than 0.9. This IC integrates a 725 V power FET and includes advanced protection features such as auto-restart for short-circuit protection, open circuit fault detection, and thermal shutdown with hysteresis. The device operates with a switching frequency of 66 kHz, which is jittered to reduce electromagnetic interference (EMI). The LNK419LG is available in eSIP-7C and eSIP-7F packages and is compliant with RoHS standards, making it suitable for environmentally conscious designs. Engineers considering the LNK419LG for their projects will benefit from its simplified design, high efficiency, and robust protection features, making it a reliable choice for LED driver applications.