ON Semiconductor Introduces Highly Optimized LED Lighting Chipset
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).