FLS3217M Datasheet | Fairchild Semiconductor

Features - Cost-Effective Solution without Input Bulk Capacitor and Feedback Circuitry - Power-Factor Correction (PFC) - Integrated Power MOSFET - Accurate Constant-Current (CC) Control Independent Online Voltage, Output Voltage, and Magnetizing Inductance Variation - Linear Frequency Control for Increased Efficiency - Open / Short-LED Protection - Cycle-by-Cycle Current Limiting - Over-Temperature Protection with Auto Restart - Low Startup Current: 20μA - Low Operating Current: 5m A - VDD Over-Voltage Protection (OVP) - VDD Under-Voltage Lockout (UVLO) - Application Voltage Range: 80 VAC ~ 308 VAC Applications - LED Lighting System Description This highly integrated PWM controller with power MOSFET, FLS3217 / FLS3247, provides several features to enhance the performance of low-power flyback converters. The proprietary topology enables simplified circuit design for LED lighting applications. By using the single-stage topology with primary-side regulation, an LED lighting board can be implemented with the few external ponents and minimized cost; requiring no input bulk capacitor or feedback circuitry. To implement good power factor and low THD, constant on-time control is utilized with an external capacitor connected to I. Precise constant-current control regulates accurate output current versus changes in input voltage and output voltage. The operating frequency is proportionally changed by the output voltage to guarantee DCM operation with higher efficiency and simple design. FLS3217 and FLS3247 provide protection features such as open-LED, short-LED, and over-temperature protection. The current-limit level is automatically reduced to minimize the output current and protect external ponents in short-LED condition. Ordering Information Part Number Operating Temperature Range FLS3217N -40°C to +125°C FLS3247N . Package Packing Method 7-Lead, Small Outline Package (SOIC) Tape & Reel 7-Lead, Small Outline Package (DIP) Tube © 2012 Fairchild...