NCP1212

NCP1212 Current Mode PWM Controller for Both Forward and Flyback Converters NCP1212 is a high performance current mode PWM controller specifically designed for off--line and DC--to--DC converter applications. The device requires very few external components and offers designer additional protection for better system reliability. The device features a trimmed oscillator for precise Duty Cycle control, accurate bandgap voltage reference, high gain error amplifier, current sensing comparator and a high current totem pole output gate driver that ideally drives the external power MOSFET. Additionally, the device has built--in programmable Brownout Detect and Soft--Start features to enhance system reliability. Also, the 48%/82% selectable maximum turn on Duty Cycle control and external programmable switching frequency capabilities make this device an ideal controller for both forward and flyback configurations. This device is available in both PDIP--8 and space saving SOIC--8 packages. Features  Trimmed Oscillator Charge and Discharge Current for Precise Duty Cycle Control  Internal High Accuracy Bandgap Voltage Reference  Current Mode Operation up to 200 kHz  Inherent Feed Forward Compensation  Latching PWM for Cycle--by--Cycle Current Limiting  High Current Totem Pole Output Gate Driver  Low Startup and Operating Current  Internal Undervoltage Lockout with Hysteresis  Internal Leading Edge Blanking for Current Feedback  Direct Interface with Optocoupler for Secondary S...