Power chip

The NCP13992 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 that require a PFC pre-stage, the NCP13992 has a dedicated output to drive the PFC controller. This feature, combined with dedicated noise-free skip mode technology, further improves the light load efficiency of the entire application. The NCP13992 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.

This combo IC will integrate the power factor correction (PFC) and quasi-resonant flyback functions required to implement a compact, energy-efficient switch-mode power supply for adapter applications. The PFC stage exhibits near unity power factor when operating in critical conduction mode (CrM) with maximum frequency clamp. This circuit combines all the necessary functions needed to build a robust and compact PFC stage while minimizing the number of external components. The quasi-resonant current mode flyback stage has a proprietary valley lockout circuit that ensures stable valley switching. The system operates down to the 4th valley and switches to frequency foldback mode for minimum frequency clamping beyond the 4th valley, eliminating noise. Skip mode operation enables excellent energy efficiency at light loads with very low standby power consumption.

Current Mode Push-Pull PWM with Programmable Slope Compensation 8-SOIC 0 to 70