NCP12711ADNR2G

NCP12711ADNR2G is a fixed frequency peak current mode PWM controller containing all of the features necessary for implementing single−ended power converter topologies. The device operates from 4V to 45V without auxiliary winding and within its thermal capabilities. The controller contains a programmable oscillator capable of operating from 100KHz to 1MHz and integrates slope compensation to prevent subharmonic oscillations. The controller includes a programmable soft−start, input voltage UVLO protection, and an over−power protection circuit which limits the total power capability of the circuit as the input voltage increases. The UVLO pin also features a shutdown comparator which allows for an external signal to disable switching and brings the controller into a low-quiescent state. Typical application includes single−ended flyback and forward converters for electric vehicles, 4 − 45V input DC/DC controller for auxiliary power.

• Current−mode control with adjustable slope compensation
• 0% duty ratio operation in no−load condition
• Internal over power protection
• Adjustable soft−start on peak current and frequency
• Programmable input voltage UVLO with hysteresis
• Shutdown threshold for external disable, overload protection with 30ms overload timer
• Internal operational amplifier, typical Vcc regulation level is 7.5V (ICC = −5mA)
• Fault auto−recovery mode with 1−s auto−recovery period
• ±1A source / sink gate driver
• MSOP10 package, maximum temperature is 150°C