Power chip

The NCP1399 is a high-performance current-mode controller for half-bridge resonant converters. The controller implements 600 V gate drivers, which simplifies layout and reduces external parts count. The built-in undervoltage input function simplifies the implementation of this controller in all applications. In applications requiring a PFC pre-stage, the NCP1399 has a dedicated output to drive the PFC controller. This feature combined with dedicated skip mode technology further improves the light load efficiency of the entire application. The NCP1399 provides a set of protection features for safe operation in any application. These include: overload protection, overcurrent protection to place hard switching cycles, undervoltage detection, open optocoupler detection, automatic dead time adjustment, overvoltage (OVP) and overtemperature (OTP) protection.

The NCP1060 integrates a fixed frequency current mode controller and 700 V MOSFETs. Utilizing PDIP™7 and SOIC-10 encapsulation, the NCP1060 offers a high level of integration including soft-start, frequency dithering, short-circuit protection, cycle skipping, adjustable peak current set point, slope compensation, and dynamic self-power supply (no auxiliary winding required). Unlike other monolithic solutions, the NCP1060 is noiseless: it switches at a usable frequency (65 or 100 kHz) during normal load operation. When the output power demand disappears, the IC will automatically enter frequency foldback mode, providing excellent energy efficiency at light loads. When power demand decreases further, it enters skip mode, reducing standby power consumption to no-load conditions. Protection features include: timers to detect overload or short circuit events, overvoltage protection with automatic recovery, and AC input line voltage detection (A version). ON Semiconductor's proprietary integrated Over Power Protection (OPP) allows you to take full advantage of the highest power available with only an external resistor, without compromising standby performance. The NCP1060/NCP1063 family can be used seamlessly in both non-isolated and isolated topologies.