The NCP1294 fixed frequency feed forward voltage mode PWM controller contains all of the features necessary to be configured in a Flyback, Boost or Forward topology. This PWM controller has been optimized for high frequency primary side control operation. In addition, this device includes such features as: Soft−Start, accurate duty cycle limit control, less than 50μA startup current, over and undervoltage protection, and bidirectional synchronization. The NCP1294 is available in a 16 lead SOIC narrow surface mount package.
●Features
●• 1.0 MHz Frequency Capability
●• Fixed Frequency Voltage Mode Operation, with Feed Forward
●• Thermal Shutdown
●• Undervoltage Lock−Out
●• Accurate Programmable Max Duty Cycle Limit
●• 1.0 A Sink/Source Gate Drive
●• Programmable Pulse−By−Pulse Overcurrent Protection
●• Leading Edge Current Sense Blanking
●• 75 ns Shutdown Propagation Delay
●• Programmable Soft−Start
●• Undervoltage Protection
●• Overvoltage Protection with Programmable Hysteresis
●• Bidirectional Synchronization
●• 25 ns GATE Rise and Fall Time (1.0 nF Load)
●• 3.3 V 3% Reference Voltage Output
●• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant
