ON Semiconductor Is Now To learn more about onsemi, please visit our website at www.onsemi.com onsemi andand other names, marks, and brands are registered and/or common law trademarks of Semiconductor Components Industries, LLC dba onsemi or its affiliates and/or subsidiaries in the United States and/or other countries. onsemi owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of onsemi product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. onsemi reserves the right to make changes at any time to any products or information herein, without notice. The information herein is provided as-is and onsemi makes no warranty, representation or guarantee regarding the accuracy of the information, product features, availability, functionality, or suitability of its products for any particular purpose, nor does onsemi assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using onsemi products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information provided by onsemi. Typical parameters which may be provided in onsemi data sheets and/ or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including Typicals must be validated for each customer application by customers technical experts. onsemi does not convey any license under any of its intellectual property rights nor the rights of others. onsemi products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use onsemi products for any such unintended or unauthorized application, Buyer shall indemnify and holdo nsemi and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that onsemi was negligent regarding the design or manufacture of the part. onsemi is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. Other names and brands may be claimed as the property of others. FAN7930B Critical Conduction Mode PFC Controller FAN7930B Critical Conduction Mode PFC Controller Description Features The FA N7930B is an active pow er factor correction Additional OVP Detection Pin ( PFC) controller for boost PFC applications that operate in critical conduction mode (CRM). It uses a V -Absent Detection IN voltage-mode PWM that compares an internal ramp Maximum Sw itching Frequency Limitation signal w ith the error amplifier output to generate a Internal Soft-Start and Startup w ithout Overshoot MOSFET turn-off signal. Because the voltage- mode Internal Total Harmonic Distortion (THD) Optimizer CRM PFC controller does not need rectified A C line voltage infor mation, it saves the pow er loss of an input Precise Adjustable Output Over-Voltage Protection voltage sensing netw ork necessary for a current- mode Open-Feedback Protection and Disable Function CRM PFC controller. Zero Current Detector (ZCD) FA N7930B provides over-voltage protection (OV P), 150 s Internal Startup Timer open-feedback protection, over-current protection MOSFET Over-Current Protection (OCP) (OCP), input-voltage-absent detection, and under- voltage lockout protection ( UVLO). The additional OV Under-Voltage Lockout w ith 3.5 V Hysteresis P pin can be used to shut dow n the boost pow er Low Startup and Operating Current stage when output voltage exceeds OV P level due Totem-Pole Output w ith High State Clamp to the resistors that are connected at INV pin are +500/-800 mA Peak Gate Drive Current damaged. The FAN7930B can be disabled if the INV pin voltage is low er than 0.45 V and the operating 8-Pin, Small-Outline Package (SOP) current decreases to a very low level. Using a new variable on-time control method, total harmonic Applications distortion (THD) is low er than in conventional CRM Adapter boost PFC ICs. Ballast LCD TV, CRT TV Related Resources SMPS