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Technical content
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 Frequency Hopping for Better EMI Performance SOP-8 Package Available Application Voltage Range: 80VAC ~ 308VAC
Applications
LED Lighting System
Description
This highly integrated PWM controller, FL7730MY, provides several features to enhance the performance of single-stage 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 FL7730MY 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 FL7730MY frequency-hopping function in the oscillator improves EM I performance. The FL7730MY controller is available in an 8-pin SOP package.
Ordering Information
Part Number Operating Temperature Range Package Packing Method FL7730MY -40°C to +125°C 8-Lead, Small Outline Package (SOP-8) Tape & Reel
Figure 3. Top Mark Figure 4. Pin Configuration the output-current regulation in constant current regulation.
3 GND Ground
4 VDD Power Supply. IC operating current and MOSFET driving current are supplied using this pin. 5 DIM Dimming. This pin controls the dimming operation of LED lighting.
8 GND Ground
© 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FL7730MY • Rev. 1.0.3 4 FL7730MY — Single-Stage Primary-Side-Regulation PWM Controller for PFC and LED Dimmable Driving 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 stressi ng 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 (1,22) 30 V VVS VS Pin Input Voltage -0.3 7.0 V VCS CS Pin Input Voltage -0.3 7.0 V VDIM DIM Pin Input Voltage -0.3 7.0 V VCOMI COMI Pin Input Voltage -0.3 7.0 V VGATE GATE Pin Input Voltage -0.3 30.0 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 Seconds) 260 °C ESD Electrostatic Discharge Capability Human Body Model, JESD22-A114 6 KV Charged Device Model, JESD22-C101 2 Notes: 1. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. 2. All voltage values, except differential voltag es, are given with respect to the GND pin. Recommended Operating Conditions The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensur e optimal performance to the datasheet specificati ons. Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings. Symbol Parameter Min. Max. Unit TA Operating Ambient Te mperature -40 125 °C
© 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FL7730MY • Rev. 1.0.3 5 FL7730MY — Single-Stage Primary-Side-Regulation PWM Controller for PFC and LED Dimmable Driving
Electrical Characteristics
VDD=20V and TA=25°C unless otherwise specified. Symbol Parameter Conditions Min. Typ. Max. Units VDD Section VDD-ON Turn-On Threshold Voltage 14.5 16.0 17.5 V VDD-OFF Turn-Off Threshold Voltag e 6.75 7.75 8.75 V IDD-OP Operating Current Maximum Frequency, CLOAD = 1nF 3 4 5 mA IDD-ST Startup Current V DD = VDD-ON – 0.16V 2 20 μA VOVP V DD Over-Voltage-Protection 22.0 23.5 25.0 V Gate Section VOL Output Voltage Low V DD=20V,IGATE=-1mA 1.5 V VOH Output Voltage High V DD=10V,IGATE=+1mA 5 V Isource Peak Sourcing Current V DD = 10 ~ 20V 60 mA Isink Peak Sinking Current V DD = 10 ~ 20V 180 mA tr Rising Time C LOAD = 1nF 100 150 200 ns tf Falling Time C LOAD = 1nF 20 60 100 ns VCLAMP Output Clamp Voltage 12 15 18 V Oscillator Section fMAX-CC Maximum Frequency in CC 60 65 70 kHz fMIN-CC Minimum Frequency in CC 21.0 23.5 26.0 kHz VSMAX-CC V S for Maximum Frequency in CC f = f MAX -2kHz 2.25 2.35 2.45 V VSMIN-CC V S for Minimum Frequency in CC f = f MIN +2kHz 0.55 0.85 1.15 V fHOPPING Frequency Hopping Range ±1.8 ±2.9 ±4.0 kHz fHOPPING Frequency Hopping Period 2 ms tON(MAX) Maximum Turn-On Time 12 14 16 s Current Sense Section VRV Reference Voltage 2.475 2.500 2.525 V VCCR EAI Voltage for Constant Current Regulation VCS = 0.44V 2.38 2.43 2.48 V tLEB Leading-Edge Blanking Time 300 ns tMIN Minimum On Time in CC V COMI = 0V 600 ns tPD Propagation Delay to GATE 50 100 150 ns ttdis-BNK t DIS Blanking Time of VS 1.5 s ICOMI-BNK VS Current for COMI Blanking 100 A Current-Error Amplifier Section Gm Transconductance 85 mho ICOMI-SINK COMI Sink Current V EAI=3V, VCOMI=5V 28 38 A ICOMI-SOURCE COMI Source Current V EAI=2V, VCOMI=0V 28 38 A VCOMI-HGH COMI High Voltage V EAI=2V 4.9 V VCOMI-LOW COMI Low Voltage V EAI=3V 0.1 V Continued on the following page…
© 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FL7730MY • Rev. 1.0.3 6 FL7730MY — Single-Stage Primary-Side-Regulation PWM Controller for PFC and LED Dimmable Driving VDD=15V and TA=25°C unless otherwise specified. Symbol Parameter Conditions Min. Typ. Max. Units Over-Current Protection Section VOCP V CS Threshold Voltage for OCP 0.60 0.67 0.74 V VLowOCP V CS Threshold Voltage for Low OCP 0.13 0.18 0.23 V tstartup Startup Time 13 ms VLowOCP-EN VS Threshold Voltage to Enable Low OCP level 0.40 V VLowOCP-DIS VS Threshold Voltage to Disable Low OCP level 0.60 V Over-Temperature Protection Section TOTP Threshold Temperature for OTP (3) 140 150 160 oC TOTP-HYS Restart Junction Temperature Hysteresis 10 oC Dimming Section VDIM-LOW Maximum VDIM at Low Dimming Angle Range 2.45 2.50 2.55 V VDIM-HIGH Maximum VDIM at High Dimming Angle Range 3.43 3.50 3.57 V DSLOW VDIM vs. Vcs,offset Slope at Low Dimming Angle Range 0.19 V/V DSHIGH VDIM vs. Vcs,offset Slope at High Dimming Angle Range 0.58 V/V Note: 3. If over-temperature protection is activated, the power system enters Auto Recovery Mode and output is disabled. Device operation above the maximum junction temperature is NOT guaranteed.
Figure 26. 8-Lead, SOIC, JEDEC MS-012, .150" Narrow Body warranty therein, which covers Fairchild products. B) ALL DIMENSIONS ARE IN MILLIMETERS. D) LANDPATTERN STANDARD: SOIC127P600X175-8M.
1.75 MAX
© 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FL7730MY • Rev. 1.0.3 13 FL7730MY — Single-Stage Primary-Side-Regulation PWM Controller for PFC and LED Dimmable Driving