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FL7732 Dataheets PDF



Part Number FL7732
Manufacturers Fairchild Semiconductor
Logo Fairchild Semiconductor
Description Single-Stage PFC Primary-Side-Regulation Offline LED Driver
Datasheet FL7732 DatasheetFL7732 Datasheet (PDF)

FL7732 — Single-Stage PFC Primary-Side-Regulation Offline LED Driver October 2012 FL7732 Single-Stage PFC Primary-Side-Regulation Offline LED Driver 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  C.

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FL7732 — Single-Stage PFC Primary-Side-Regulation Offline LED Driver October 2012 FL7732 Single-Stage PFC Primary-Side-Regulation Offline LED Driver 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: 20 μA  Low Operating Current: 5 mA  VDD Under-Voltage Lockout (UVLO)  Gate Output Maximum Voltage Clamped at 18 V  SOP-8 Package  Application Voltage Range: 80 VAC ~ 308 VAC Applications  LED Lighting System Description This highly integrated PWM controller provides several features to enhance the performance of low-power flyback converters. The proprietary topology, TRUECURRENT® 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 overtemperature 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 SmallOutline Package (SOP). Ordering Information Part Number FL7732M_F116 Operating Temperature Range Package -40°C to +125°C 8-Lead, Small Outline Integrated Circuit Package (SOIC) Packing Method Tape & Reel © 2011 Fairchild Semiconductor Corporation FL7732 • Rev. 1.0.6 www.fairchildsemi.com FL7732 — Single-Stage PFC Primary-Side-Regulation Offline LED Driver Application Diagram Internal Block Diagram Figure 1. Typical Application © 2011 Fairchild Semiconductor Corporation FL7732 • Rev. 1.0.6 Figure 2. Functional Block Diagram 2 www.fairchildsemi.com FL7732 — Single-Stage PFC Primary-Side-Regulation Offline LED Driver Marking Information Pin Configuration F: Fairchild Logo Z: Plant Code X: 1-Digit Year Code Y: 1-Digit Week Code TT: 2-Digit Die Run Code T: Package Type (M=SOP) M: Manufacture Flow Code Figure 3. Top Mark Figure 4. Pin Configuration Pin Definitions Pin # 1 2 3 4 5 6 7 8 Name CS GATE GND VDD NC VS COMI GND Description Current Sense. This pin connects a current-sense resistor to detect the MOSFET current for the output-current regulation in constant-current regulation. PWM Signal Output. This pin uses the internal totem-pole output driver to drive the power MOSFET. Ground Power Supply. IC operating current and MOSFET driving current are supplied using this pin. No Connect Voltage Sense. This pin detects the output voltage information and discharge time for maximum frequency control and constant current regulation. This pin is connected to an auxiliary winding of the transformer via resistors of the divider. Constant Current Loop Compensation. This pin is connected to a capacitor between the COMI and GND pin for compensation current loop gain. Ground © 2011 Fairchild Semiconductor Corporation FL7732 • Rev. 1.0.6 3 www.fairchildsemi.com FL7732 — Single-Stage PFC Primary-Side-Regulation Offline LED Driver Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Symbol Parameter Min. Max. Unit VVDD DC Supply Voltage(1,2) 30 V VVS VS Pin Voltage -0.3 7 V VCS CS Pin Input Voltage -0.3 7 V VCOMI COMI Pin Input Voltage -0.3 7 V VGATE GATE Pin Input Voltage -0.3 30 V PD Power Dissipation (TA<50°C) 633 mW ΘJA Thermal Resistance (Junction-to-Air) 158 °C /W ΘJC Thermal Resistance (Junction-to-Case) 39 °C /W TJ Maximum Junction Temperature 150 °C TSTG Storage Temperature Range -55 150 °C TL Lead Temperature (Soldering 10 s) 260 °C Notes: 1. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. 2. All voltage values, except differential voltages, are given with respect to the GND pin. © 2011 Fairchild Semiconductor Corporation FL7732 • Rev. 1.0.6 4 www.fairchildsemi.


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