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FL7732 − Single-Stage PFC Primary-Side-Regulation Offline LED Driver
This highly integrated PWM controller 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 single-stage topology with primary-side regulation, a LED lighting board can be implemented with few external components and minimized cost. No input bulk capacitor or feedback circuitry is required. To implement good power factor and low THD, 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 adjusted by the output voltage to guarantee DCM operation with higher efficiency and simpler design.
FL7732 provides open-LED, short-LED, and over-temperature protection features. The current limit level is automatically reduced to minimize output current and protect external components in a short-LED condition.
The FL7732 controller is available in an 8-pin SOP package.
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Product Status/Pricing/Packaging
| Product | Product & Eco Status | *Pricing | Packaging & Packing Info | **Package Marking Convention | Qualification Support | Compliance Certificates |
|---|---|---|---|---|---|---|
| FL7732M_F116 |
Full Production Green as of Mar 2012 |
$0.99 | SO 8L NB Details TAPE REEL |
Line 1:$Y (Fairchild logo) &Z (Plant Code) &2 (2-Digit Date Code) &K
Line 2:7732
Line 3:MC |
FIT :
1
Moisture Sensitivity Level (MSL) : 1 Max Reflow Temp : 260 |
- 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 FL7732 is available. **
Features
- Cost-Effective Solution: No Input Bulk Capacitor or Feedback Circuitry
- Power Factor Correction
- Accurate Constant-Current (CC) Control, Independent Online Voltage, Output Voltage, and Magnetizing Inductance Variation
- Linear Frequency Control Improves Efficiency and Simplifies 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
- VDD Under-Voltage Lockout (UVLO)
- Gate Output Maximum Voltage Clamped at 18V
- SOP-8 Package
- Application Voltage Range: 80VAC ~ 308VAC
- Retrofit E17/E26/E27 and PAR Lamps
- Replacement of Incandescent, CFL, and Linear Lamps
Applications
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Application Notes
| Application Note | Description |
|---|---|
| AN-9750 | High-Power Factor Flyback Converter for LED Driver with FL7732 PSR Controller(693 K) 17-Apr-2013 |
| AN-FEBL026 | User Guide for FEBFL7732_L26U017B Evaluation Board Universal Input 16.8W LED Driver (PFC PSR Flyback)(3,173 K) 15-Apr-2013 |
| AN-FEBL029 | User Guide for FEBFL7732_L29U021A(1,747 K) 30-Nov-2012 |
| AN-7732 | FL7732 Design Tool Flow (Flyback)(378 K) 20-Apr-2012 |
| AN-FEBL025 | User Guide for FEBFL7732_L25U008B Evaluation Board Universal Input 8.4W LED Driver (PFC PSR Flyback)(2,182 K) 21-Sep-2012 |
| AN-FEBL028 | User Guide for FEBFL7732_L28U008A Evaluation Board Universal Input 8.4W LED Driver (PFC Buck-Boost)(2,992 K) 13-Nov-2012 |
| AN-7733 | FL7732 Design Tool Flow (Buck Boost)(154 K) 20-Mar-2012 |
Reference Designs
| Application | Document Number | Featured Products | Output Power |
Input Voltage |
Topology |
|---|---|---|---|---|---|
| LED Lighting | RD-L025 | FL7732 | 8.4W | 90-265VAC | PFC PSR Flyback |
| LED Lighting | RD-L028 | FL7732 | 8.4W | 90-265VAC | PFC Buck-Boost |
| LED Lighting | RD-L026 | FL7732 | 16.8W | 90-265VAC | PFC PSR Flyback |
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