Power controller simplifies the circuit in half-bridge resonant converter designs

The NCP13994 is a high-performance current-mode controller for half-bridge resonant converters in offline power supplies. 

The controller incorporates a 700 V-rated start-up current source and X2 capacitor discharge function as well as gate drivers for external MOSFETs. This simplifies the layout of power-supply circuits, and reduces the application component count. 

The NCP13994 provides a dedicated output to interface with an external power factor correction (PFC) controller, a convenient feature for applications in which a PFC front end is needed. A quiet skip-mode technique also ensures excellent no-load and light-load efficiency. 

The NCP13994 provides a suite of protection features that enable safe operation. These include: 

• Overload protection
• Over-current protection 
• Brown-out detection
• Open optocoupler detection
• Over-voltage protection 
• Over-temperature protection