FL7733A Datasheet | onsemi

Description The FL7733A is a highly- integrated PWM controller with advanced Primary- Side Regulation (PSR) technique to minimize ponents in low- to- mid- power LED lighting converters. Using an innovative TRUECURRENT® technology to provide tight tolerance constant- current output, this LED driver enables designs with constant current (CC) tolerance of less than ±1% over the universal line voltage range to meet stringent LED brightness requirements. By minimizing turn- on time fluctuation, high power factor and low THD over the universal line range are obtained in the FL7733A. An integrated high- voltage startup circuit implements fast startup and high system efficiency. During startup, adaptive feedback loop control anticipates the steady- state condition and sets initial feedback condition close to the steady state to ensure no overshoot or undershoot of LED current. The FL7733A also provides powerful protections, such as LED short / open, output diode short, sensing resistor short / open, and over- temperature for high system reliability. The FL7733A controller is available in an 8- pin Small- Outline Package (SOP). Features Performance - <±3% Total Constant Current Tolerance Over All Conditions <±1% Over Universal Line Voltage Variation <±1% from 50% to 100% Load Voltage Variation <±1% with ±20% Magnetizing Inductance Variation - Primary- Side Regulation (PSR) Control for Cost- Effective Solution without Requiring Input Bulk Capacitor and Secondary Feedback Circuitry - Application Input Voltage Range: 80 VAC - 308 VAC - High PF of >0.9, and Low THD of <10% Over Universal Line Input Range - Fast <200 ms Start- up (at 85 VAC) Using Internal High- Voltage Startup with VDD Regulation - Adaptive Feedback Loop Control for Startup without Overshoot System Protection - LED Short / Open Protection - Output Diode Short Protection - Sensing Resistor Short / Open Protection - VDD Over- Voltage Protection (OVP) - VDD Under- Voltage Lockout (UVLO) MARKING DIAGRAM ZXYTT 7733A 7733A =...