FL7740MX ON Semiconductor

FL7740 Constant-Voltage Primary-Side- Regulation PWM Controller for Power Factor Correction The FL7740 provides accurate CV regulation in the steady state with differentiated dynamic function to minimize overshoot and undershoot of www.onsemi.com output voltage in line and load transient condition. Standby power is less than 0.3 W for smart lighting application and power factor is higher than 0.9 even at half load condition when enabling PF optimizer for wide output power scalability. Startup time is less than 0.2 sec with built-in high voltage startup circuit SO 10L and output voltage quickly reaches to the target CV level by loop gain transition technique during startup. NB Various protections such as over load, output diode short, sensing resistor short, output short and output over voltage protection guarantee high MARKING DIAGRAM system reliability. ZXYKK Features FL7740 MA Wide universal input range (90 V ~ 305 V ) AC AC Precise CV regulation in the steady state : < 3 % CV regulation in the load transient : < 10 % Z = Plant code Overshoot-less fast HV start up time ( < 0.2 sec ) X = 1 digit year code Low standby power Y = 1 digit week code PF higher than 0.9 at high-line and half load by PF optimizer KK = 2 digit lot traceability code M = Package code Pulse-by-pulse current limit A = Product version Output short protection Output over voltage protection PIN CONNECTIONS Output diode short protection VDD HV Sensing resistor short & open protection GND NC Over load protection GATE COMV CS BIAS VS PF Typical Applications LED Lighting System AC-DC Adapters, TVs, Monitors ORDERING INFORMATION Off Line Appliances Requiring Power Factor Correction See detailed ordering and shipping information in the package dimensions section on page 13 of this data sheet. Semiconductor Components Industries, LLC, 2016 1 Publication Order Number: February 2018 - Rev. 3 FL7740 FL7740 V OUT.MAIN Secondary V AC DC-DC Converter Dimming FL7740 Signal V OUT.BIAS VDD HV Dimming GND NC Control GATE COMV Module 0-10, DALI, CS BIAS Wireless, etc. VS PF Figure 1. Application Schematic Dynamic control GND V DYN-REF1,2,3 HV GM amp. V REF NC V JFET EAV S/H VS VDD Gain control at startup COMV Digital Duty Control Driver GATE BIAS 5V regulator Protection V IN.PK CS V open/short protection OUT Digital PF R open/short protection CS VDD PF optimizer Over current protection EAV Over load protection Thermal shutdown V DYN-REF C detector PF control Shutdown Figure 2. Simplified Block Diagram www.onsemi.com 2