FL7730 − Dimmable Single-Stage PFC PSR Offline LED Driver

This highly integrated PWM controller, FL7730, provides several features to enhance the performance of single-stage flyback converters. The proprietary TRUECURRENT® technology enables the simplified circuit design for LED lighting applications.

TRIAC dimming is smoothly managed by dimming brightness control without flicker. By using single-stage topology with primary-side regulation, an LED lighting board can be implemented with few external components and minimized cost. It does not require an input bulk capacitor or feedback circuitry. To implement good power factor and low total harmonic distortion, constant on-time control is utilized with an external capacitor connected to the COMI pin.

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 Discontinuous Conduction Mode (DCM) operation with higher efficiency and simpler design. The FL7730 provides protections such as open-LED, short-LED, and over-temperature protections. Current-limit level is automatically reduced to minimize output current and protect external components in a short-LED condition.

The FL7730 controller is available in an 8-pin SOP package.

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Product Status/Pricing/Packaging

Index	Product	Product & Eco Status	*Pricing	Packaging & Packing Info	**Package Marking Convention	Qualification Support	Compliance Certificates
0	FL7730MY_F116	Full Production Green as of Mar 2012	$1.06	SO 8L NB Details SO 8L NB Drawing TAPE REEL	Line 1:$Y (Fairchild logo) &Z (Plant Code) &2 (2-Digit Date Code) &K Line 2:7730 Line 3:MYD	FIT : 1 Moisture Sensitivity Level (MSL) : 1 Max Reflow Temp : 260	RoHS IPC1752 RoHS/REACH/JIG RoHS/REACH/JIG

Fairchild 1,000 piece Budgetary Pricing. *
If there is no sample button displayed at the top of the page, please contact one of the Fairchild distributors or your local sales office to obtain samples.
Top mark packaging information for product FL7730 is available. **

Features

Compatible with Traditional TRIAC Control (No need to change existing lamp infrastructure: wall switch & wire)
Compatible with Non-Dimming Lamp Designs
Cost-Effective Solution without Input Bulk Capacitor and Feedback Circuitry
Power Factor Correction (PFC)
Accurate Constant-Current (CC) Control, Independent Online Voltage, Output Voltage, Magnetizing Inductance Variation
Line Voltage Compensation for CC Control
Linear Frequency Control for Better Efficiency and Simple Design
Open-LED Protection
Short-LED Protection
Cycle-by-Cycle Current Limiting
Over-Temperature Protection with Auto Restart
Low Startup Current: 20µA
Low Operating Current: 5mA
SOP-8 Package Available
Application Voltage Range: 80V_AC ~ 308V_AC
Retrofit E17/E26/E27 and PAR Lamps
Replacement of Incandescent, CFL, and Linear Lamps

Applications

Lighting

Application Notes

Application Note	Description
AN-7730	FL7730 Design Tool Flow(741 K) 20-Apr-2012
AN-FEBL021H	User Guide for FEBFL7730_L21H017A Evaluation Board High Line 17W LED Driver (PFC PSR Flyback)(1,592 K) 13-Sep-2012
AN-9745	Design Guide for TRIAC Dimmable LED Driver Using FL7730(1,484 K) 10-Apr-2013
AN-FEBL021L	User Guide for FEBFL7730_L21L017A Evaluation Board Low Line 17W LED Driver (PFC PSR Flyback)(2,395 K) 12-Sep-2012
AN-FEB020H	User Guide for FEBFL7730_L20H008B Evaluation Board High Line 7.8W LED Driver (PFC PSR Flyback)(1,369 K) 20-Aug-2012
AN-9745SC	Design Guide for TRIAC Dimmable LED Driver Using FL7730(898 K) 20-Feb-2012
AN-FEB020L	User Guide for FEBFL7730_L20L008B Evaluation Board Low Line 7.8W LED Driver (PFC PSR Flyback)(1,200 K) 20-Aug-2012

Videos

Single Stage PSR Controller (FL7730/FL7732) for Simplified LED Design Complexity

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Reference Designs

Application	Document Number	Featured Products	Output Power	Input Voltage	Topology
LED Lighting	RD-L021L	FL7730	16.8W	90-140V_AC	PFC PSR Flyback
LED Lighting	RD-L020L	FL7730	8.4W	90 ~ 140 V/AC	PFC PSR Flyback
LED Lighting	RD-L021H	FL7730	16.8W	180-265V_AC	PFC PSR Flyback
LED Lighting	RD-L020H	FL7730	8.4W	180-265V_AC	PFC PSR Flyback

Additional Resources

Design Tools Knowledgebase – Ask a Question Find a local sales office Product change notices (PCN) How to Buy Products or Order Samples


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