ON Semiconductor Introduces Highly Optimized LED Lighting Chipset

ON Semiconductor has introduced two new LED drivers to help designers optimize their solutions for automotive, industrial and general lighting applications.  ON Semiconductor’s new NCL30051 stage, power factor correction (PFC) and Resonant Half Bridge LED driver, combined with the new NCL30160, a dimmable constant current step-down (buck) LED driver, provide an ideal solution for high-brightness LED driver applications where space is limited and high efficiency is important.
The NCL30051 is a dedicated LED power supply integrated circuit (IC) capable of delivering a constant voltage to a step-down DC-DC converter/LED driver (e.g. NCL30160). The device, which combines a critical conduction mode (CrM), PFC controller and a half-bridge resonant controller with a built-in 600 volt (V) driver, is optimized for off-line power supply applications - all the features needed to implement highly efficient, small form factor designs. The NCL30051’s half-bridge stage operates at a fixed frequency. Regulation is achieved by adjusting the PFC stage output voltage. The device integrates open feedback loop protection, plus PFC overvoltage and undervoltage detection mechanisms, as well as an adjustable frequency oscillator which can be set at up to 75 kilohertz (kHz).