DATA SHEET www.onsemi.com Primary-Side-Regulated LED Driver with Power SOIC8 Factor Correction CASE 751EB FL7733A MARKING DIAGRAM Description ZXYTT The FL7733A is a highlyintegrated PWM controller with advanced 7733A PrimarySide Regulation (PSR) technique to minimize components in TM lowtomidpower LED lighting converters. Using an innovative TRUECURRENT technology to provide tight tolerance constantcurrent output, this LED driver enables designs with 7733A = Device Code constant current (CC) tolerance of less than 1% over the universal line Z = Plant Code X= 1Digit Year Code voltage range to meet stringent LED brightness requirements. Y= 1Digit Week Code By minimizing turnon time fluctuation, high power factor and low TT = 2Digit Die Run Code THD over the universal line range are obtained in the FL7733A. An T = Package Type (M = SOP) integrated highvoltage startup circuit implements fast startup and high M = Manufacture Flow Code system efficiency. During startup, adaptive feedback loop control anticipates the steadystate condition and sets initial feedback condition close to the steady state to ensure no overshoot or undershoot of LED current. PIN CONFIGURATION The FL7733A also provides powerful protections, such as LED CS 1 8 HV short / open, output diode short, sensing resistor short / open, and overtemperature for high system reliability. GATE 2 7 NC The FL7733A controller is available in an 8pin SmallOutline Package (SOP). 3 3 GND 3 6 COMI Features VDD 4 5 VS Performance Top View <3% Total Constant Current Tolerance Over All Conditions <1% Over Universal Line Voltage Variation <1% from 50% to 100% Load Voltage Variation ORDERING INFORMATION <1% with 20% Magnetizing Inductance Variation See detailed ordering and shipping information on page 12 of PrimarySide Regulation (PSR) Control for CostEffective Solution this data sheet. without Requiring Input Bulk Capacitor and Secondary Feedback Circuitry Application Input Voltage Range: 80 V 308 V AC AC System Protection (continued) High PF of >0.9, and Low THD of <10% Over Universal Line Input All Protections are Auto Restart (AR) Range CyclebyCycle Current Limit Fast <200 ms Startup (at 85 V ) Using Internal HighVoltage AC OverTemperature Protection (OTP) Startup with V Regulation DD All Protections are Auto Restart (AR) Adaptive Feedback Loop Control for Startup without Overshoot CyclebyCycle Current Limit System Protection Applications LED Short / Open Protection Low to Mid Power LED Lighting Systems Output Diode Short Protection of 5 W to Greater than 60 W Compatible Sensing Resistor Short / Open Protection with Analog Dimming Function V OverVoltage Protection (OVP) DD Related Product Resources V UnderVoltage Lockout (UVLO) DD FL7733A Product Folder Semiconductor Components Industries, LLC, 2014 1 Publication Order Number: November, 2021 Rev. 2 FL7733A/D+ + FL7733A APPLICATION DIAGRAM + DC Output AC Input 2 GATE 8 HV CS 1 6 COMI VDD 4 3 GND VS 5 NC 7 Figure 1. Typical Application BLOCK DIAGRAM Shutdown Max. Duty 8 HV Gate Driver 2 Controller GATE 250 ms EAV + Timer S Q OCP 1.35 V Current Limit R V DD Control SRSP 4 Good VDD + SRSP Monitor VCSCL + V OVP 0.1 V LEB 1CS Sawtooth Generator VDD Internal OVP Bias OSC 6 COMI EAI S Q 3 GND Error V REF Amp. R Line SLP Compensator OCP DCM V Good OTP DD t Controller DIS TRUECURRENT SRSP Detector Calculation VS OVP 3 V VS OVP 7 N.C EAV Sample & Hold 5 VS SLP SLP Monitor 0.3 V Figure 2. Functional Block Diagram www.onsemi.com 2 + + + +