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.
|Index||Product||Product & Eco Status||*Pricing||Packaging & Packing Info||**Package Marking Convention||Qualification Support||Compliance Certificates|
Green as of Mar 2012
|$1.06||SO 8L NB Details||
Line 1:$Y (Fairchild logo)
&Z (Plant Code)
&2 (2-Digit Date Code) &K
Moisture Sensitivity Level (MSL) : 1
Max Reflow Temp : 260
|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|
Single Stage PSR Controller (FL7730/FL7732) for Simplified LED Design Complexity
|Application||Document Number||Featured Products||Output
|LED Lighting||RD-L021L||FL7730||16.8W||90-140VAC||PFC PSR Flyback|
|LED Lighting||RD-L020L||FL7730||8.4W||90 ~ 140 V/AC||PFC PSR Flyback|
|LED Lighting||RD-L021H||FL7730||16.8W||180-265VAC||PFC PSR Flyback|
|LED Lighting||RD-L020H||FL7730||8.4W||180-265VAC||PFC PSR Flyback|