Product Overview CS51221: Enhanced Voltage Mode PWM Controller for Forward or Flyback For complete documentation, see the data sheet Product Description The CS51221 Enhanced Voltage Mode PWM Controller contains all of the features necessary for basic voltage mode operation. 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 50uA startup current, over and under voltage protection and bidirectional synchronization. The CS51221 is available in a SOIC-16 and TSSOP-16 surface mount packages. Features • • • • • • • • • • 1MHz Frequency Capability Fixed Frequency Voltage Mode Operation, with Feed Forward Thermal Shutdown Under Voltage Lock-out Accurate Programmable Max Duty Cycle Limit 1A Sink/Source Gate Drive Programmable Pulse-by-Pulse Overcurrent Protection Leading Edge Current Sense Blanking 75ns Shutdown Propagation Delay Programmable Soft Start For more features, see the data sheet Applications • Hot Swap - DC-DC Conversion Part Electrical Specifications Product Compliance Status Topolog y Control Mode fsw Typ (kHz) StandUVLO by Mode (V) Short Circuit Protecti on Latch Soft Start VCC Max Drive (V) Cap. (mA) Packag e Type CS51221EDR16G AEC Qualified Active Forward Voltage Mode Up to 1000 No No Yes Yes 15 SOIC16 Yes PPAP Capable Pb-free Halide free For more information please contact your local sales support at www.onsemi.com Created on: 6/30/2016 1000