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onsemi NCP12711 Current Mode PWM Controller is a fixed-frequency peak-current-mode PWM controller incorporating all of the features required for implementing single-ended power converter topologies. The NCP12711 provides a 4V to 45V wide input range without auxiliary winding and within its thermal capabilities.
The onsemi NCP12711 PWM Controller includes a programmable oscillator capable of operating from 100kHz to 1MHz and integrates slope compensation to prevent subharmonic oscillations. The device features a programmable soft-start, input voltage UVLO protection, and an over-power protection (OPP) circuit, which limits the total power capability of the circuit as the input voltage increases. The UVLO pin also offers a shutdown comparator which allows an external signal to disable switching and brings the controller into a low-quiescent state. The onboard op amp enables the implementation of primary-side regulated converters or non-isolated DC-D converters.
The NCP12711 contains protection features, including cycle-by-cycle peak-current limiting with smooth frequency expansion and timer-based overload protection. All protection features place the device into a low quiescent fault mode with a 1s auto-recovery period to permit system recovery if the fault condition is removed.
