FLS3217 Datasheet, PDF (1/14 Pages) Fairchild Semiconductor – Single-Stage PFC Primary-Side-Regulation Offline LED Driver with Integrated Power MOSFET

May 2012
FLS3217 / FLS3247
Single-Stage PFC Primary-Side-Regulation Offline
LED Driver with Integrated Power MOSFET
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: 5mA
 V_DD Over-Voltage Protection (OVP)
 V_DD Under-Voltage Lockout (UVLO)
 Application Voltage Range: 80V_AC ~ 308V_AC
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 components 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 COMI.
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 components in short-LED condition.
Ordering Information
Part Number
Operating
Temperature Range
FLS3217M
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 Semiconductor Corporation
FLS3217 / FLS3247 • Rev. 1.0.0
www.fairchildsemi.com