The NCL2801 is a current mode CRM Boost PFC control IC which can provide the best class THD performance over extended operating range utilizing ON Semiconductor’s THD enhancer technique. Efficiency and standby power are enhanced with Valley Count Frequency Fold-back (VCFF) method. Valley Count Frequency Foldback
Dynamic Response Enhancer
Soft/Fast OVP
THD Enhancer
Line level feed-forward
Protections - Brown Out - Thermal Shutdown - OVP - Over Current limitation - Pin open/short protection
Wide Vcc (10.5∼28 V) range/ 3 Vcc startup level
OTA Error Amp
Maximize efficiency over wide load range
Lower output undershoot
Lower output overshoot
Improve THD performance
Optimal loop gain in universal input
High System Reliability
Design Flexibility
Easy loop design and lower power loss by higher RFB
Applications
All Off Line Appliances Requiring Power Factor Correction
End Products
Lighting Ballasts (LED, Fluorescent)
Flat TV
PC Power Supplies