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FL7730 Dataheets PDF



Part Number FL7730
Manufacturers Fairchild Semiconductor
Logo Fairchild Semiconductor
Description Single-Stage Primary-Side-Regulation PWM Controller
Datasheet FL7730 DatasheetFL7730 Datasheet (PDF)

FL7730 — Single-Stage Primary-Side-Regulation PWM Controller for PFC and LED Dimmable Driving FL7730 Single-Stage Primary-Side-Regulation PWM Controller for PFC and LED Dimmable Driving 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) Cont.

  FL7730   FL7730



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FL7730 — Single-Stage Primary-Side-Regulation PWM Controller for PFC and LED Dimmable Driving FL7730 Single-Stage Primary-Side-Regulation PWM Controller for PFC and LED Dimmable Driving 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: 20 μA  Low Operating Current: 5 mA  SOP-8 Package Available  Application Voltage Range: 80 VAC ~ 308 VAC Applications  LED Lighting System Description This highly integrated PWM controller, FL7730, provides several features to enhance the performance of singlestage flyback converters. The proprietary topology, TRUECURRENT® 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 Small Outline Package (SOP). Related Resources Evaluation Board: FEBFL7730_L20L008A Evaluation Board: FEBFL7730_L20H008A Ordering Information Part Number Operating Temperature Range Package FL7730MY_F116 -40°C to +125°C 8-Lead, Small Outline Package (SOP-8) Packing Method Tape & Reel © 2011 Fairchild Semiconductor Corporation FL7730 • Rev. 2, Feb-2020 www.fairchildsemi.com FL7730 — Single-Stage Primary-Side-Regulation PWM Controller for PFC and LED Dimmable Driving Application Diagram Internal Block Diagram Figure 1. Typical Application © 2011 Fairchild Semiconductor Corporation FL7730 • Rev. 2, Feb-2020 Figure 2. Functional Block Diagram 2 www.fairchildsemi.com FL7730 — Single-Stage Primary-Side-Regulation PWM .


FLS3247N FL7730 FL7730MY


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