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Document overview
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Technical content
Features
Digitally Implemented Active PFC Function (No Additional Circuit Necessary for High PF) Built-in HV Supplying Circuit: Self Biasing Application Input Range: 80 VAC ~ 308 VAC AOCP Function with Auto-Restart Mode Built-in Over-Temperature Protection Function Cycle-by-Cycle Current Limit Current-Sense Pin Open Protection Low Operating Current: 0.85 mA (Typical) Under-Voltage Lockout with 5 V Hysteresis Programmable Oscillation Frequency Programmable LED Current Analog Dimming Function Soft-Start Function Precise Internal Reference: ±3%
Applications
LED Lamp for Decorative Lighting LED Lamp for Low-Power Lighting
Description
The FL770 1 LED lamp driver is a simple IC with PFC function. The special “adopted digital” technique of the IC can automatically detect input voltage condition and send a n internal reference signal for achieving high power factor. When AC input is applied to the IC , PFC function is automatically enabled. Otherwise, when DC input is applied to the IC , PFC function is automatically disabled. The F L7701 does not need a bulk capacitor (electrolytic capacitor) for supply rail stability, which can significantly affect to LED lamp system. Related Resources Evaluation Board: FEBFL7701_L30U003A
Ordering Information
Temperature Range Package Packing Method FL7701MX -40°C to +125°C 8-Lead, Small Outline Integrated Circuit (SOIC), JEDEC MS-012, .150-inch Narrow Body Tape & Reel
Figure 3. Pin Configuration 2 OUT OUT. Connects to the MOSFET gate. 3 VCC VCC. Supply pin for stable IC operation ZCD signal detection used for accurate PFC function. frequency when this pin is open or floating.
5 ADIM
capacitor between the ADIM and GND. 6 GND GROUND. Ground for the IC.
7 NC No Connection
© 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FL7701 • Rev. 1.0.4 4 FL7701 — Smart LED Lamp Driver IC with PFC Function Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recomme nded 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 VCC IC Supply Voltage 20 V HV High Voltage Sensing 500 V IO+/IO- Peak Drive Output Current (Sourcing / Sinking) 250 mA VADIM Analog Dimming 5 V VRT RT Pin Voltage 5 V VCS Allowable Current Sensing Detection Voltage 5 V TA Operating Ambient Temperature Range -40 +125 C TJ Operating Junction Temperature -40 +150 C TSTG Storage Temperature Range -65 +150 C θJA Thermal Resistance Junction-Air(1,2) 135 C/W PD Power Dissipation 660 mW ESD Electrostatic Discharge Capability Human Body Model, JESD22-A114 2000 V Charged Device Model, JESD22-C101 1000 Notes: 2. Assume no ambient airflow.
© 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FL7701 • Rev. 1.0.4 5 FL7701 — Smart LED Lamp Driver IC with PFC Function
Electrical Characteristics
Typical values are at TA = +25°C. Specifications to -40°C ~ 125°C are guaranteed by design based on final characterization results. Symbol Parameter Conditions Min. Typ. Max. Unit VCC Bias Section VCC VCC Regulator Output Voltage VHV=100 VDC 14.0 15.5 17.0 V VCCST+ UVLO Positive Going Threshold VCC Increasing 12 13 14 V VCCST- UVLO Negative Going Threshold VCC Decreasing 7 8 9 V VCCHY UVLO Hysteresis 4 5 6 V IHV HV Pin Current VHV=100 VDC, CL=150 pF, RT=Open 0.85 1.10 mA IST Startup Current 120 150 μA Switching Section fOSC Operating Frequency RT=5.95 kΩ 200 250 300 kHz RT=87 kΩ 16 20 24 kHz RT Open 40.5 45.0 49.5 kHz tMIN Minimum On Time 400 ns DMAX Maximum Duty Cycle 50 % tLEB Leading Edge Blanking Time(3) 350 ns VRT Voltage Reference of RT pin 1.5 V Soft-Start Section tss Soft-Start Time(3) DC Mode 48 60 72 ms AC Mode 7 Periods Reference Section VCS1 Internal Reference Voltage of CS Pin DC Mode 0.354 0.365 0.376 V VCS2 AC Mode(3) 0.485 0.500 0.515 Protection Section OVPVCC Over-Voltage Protection on VCC Pin 17.7 18.7 19.7 V VAOCP Abnormal OCP Level at CS Pin(3) 2.5 V tAOCP Abnormal Detection Time(3) 70 ns tTSDH Thermal Shutdown Threshold(3) 140 150 °C tTSDHY Thermal Shutdown Threshold Hysteresis(3) 50 °C Dimming Section VADIM(ST+) Analog Dimming Positive Going Threshold(3) 3.15 3.50 3.85 V VADIM(ST-) Analog Dimming Negative Going Threshold(3) 0.50 0.75 V IAD Internal Current Source for ADIM Pin 9 12 15 μA Note: 3. These parameters, although guaranteed, are not 100% tested in production.
B) ALL DIMENSIONS ARE IN MILLIMETERS. D) LANDPATTERN STANDARD: SOIC127P600X175-8M.
1.75 MAX
0.25 C B A
Figure 26. 8-Lead, Small-Outline Integrated Circuit (SOIC), JEDEC MS-012, .150-Inch Narrow Body the warranty therein, which covers Fairchild products. http://www.fairchildsemi.com/packaging/.
© 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FL7701 • Rev. 1.0.4 13 FL7701 — Smart LED Lamp Driver IC with PFC Function