CS51023A

Enhanced Current Mode PWM Controller CS51021A The CS51021A Fixed Frequency PWM Current Mode Controller provides all necessary features required for AC−DC or DC−DC primary side control. Several features are included eliminating the additional components needed to implement them externally. In addition to low startup current (75 mA) and high frequency operation capability, the CS51021A includes overvoltage and undervoltage monitoring, externally programmable dual threshold overcurrent protection, current sense leading edge blanking, current slope compensation, accurate duty cycle control and an externally available 5.0 V reference. The CS51021A features bidirectional synchronization capability. The CS51021A is available in a 16 lead narrow body SOIC package. Device CS51021A Sleep/Synch Synch VCC Start/Stop 8.25 V/7.7 V Features 75 mA Max. Startup Current Fixed Frequency Current Mode Control 1.0 MHz Switching Frequency Undervoltage Protection Monitor Overvoltage Protection Monitor with Programmable Hysteresis Programmable Dual Threshold Overcurrent Protection with Delayed Restart Programmable Soft Start Accurate Maximum Duty Cycle Limit Programmable Slope Compensation Leading Edge Current Sense Blanking 1.0 A Sink/Source Gate Drive Bidirectional Synchronization 50 ns PWM Propagation Delay These Devices are Pb−Free and are RoHS Compliant DATA SHEET www.onsemi.com 16 1 SOIC−16 D SUFFIX CASE 751B−05 PIN CONNECTIONS AND MARKING DIAGRAM 1 GATE ISEN...