PFC and Half-Bridge Resonant Combo Controller for LED Lighting

The NCL30051 is a combination of PFC and half−bridge resonant controllers optimized for off−line LED lighting solutions. This device integrates all the features needed to implement a highly efficient and small form factor LED Driver/Power Supply. It contains a critical conduction mode (CrM) power factor correction (PFC) boost controller and a half−bridge resonant controller with a built−in 600 V driver. The half−bridge stage operates at a fixed frequency, greatly simplifying the control implementations. The output (current or voltage) regulation is achieved by adjusting the PFC stage output voltage −based on a control signal generated external to the NCL30051.

FEATUREs
•Voltage Mode CrM Power Factor Correction Controller
•PFC Open Feedback Loop Protection
•PFC Undervoltage Detector
•PFC Overvoltage Detector
•Half−Bridge Stage with 600 V High Side Gate Drive
•State Machine Ensures Proper Turn−on and Turn−off of Half−Bridge Stage
•Controllers are Properly Sequenced for Fault Free Operation
•Non−Latching Fault Management
•Internal 600 V Startup Circuit
•Wide Temperature Range of −40°C to +125°C
•This is a Pb−Free Device

Typical Applications
•High Efficiency LED Drivers and Power Supplies
•Electronic Control Gear
•Lighting Ballasts