Preliminary Datasheet Off-line Primary Side Regulation Controller for Dimmable LED Driver General Description Features The AP1681 is a powerful high performance AC/DC power supply controller for dimmable LED lighting applications. The device uses Pulse Frequency Modulation (PFM) technology to regulate output current according to the wall dimmer conduct angle. The AP1681 achieves wide dimming range without visible flicker and is compatible with diverse dimmers. • The AP1681 features low start-up current, low operation current and high efficiency. It also has rich protection functions including over voltage, short circuit, over current and over temperature protections. • • • • • • • • • • • • The AP1681 is available in SOIC-8 package. AP1681 Primary Side Control for Output Current Regulation Without Opto-coupler and Secondary CV/CC Control Circuitry Adjustable Full Brightness and Full Dimming Setting Wide Dimming Range From 100% to 1%, Down to Full Darkness Adjustable Dimming Curve for Human Eye Sensitivity No Visible Flicker Connectivity with Analog / Digital / Hybrid Dimming Mode Built-in Acceleration Start Adjustable Soft-start Timing CV Open-load Regulation and Reload Detection Over Voltage and Short Circuit Protection Over Temperature Protection Over Current Protection Maximum Switch On-time Protection Applications • Dimmable LED Driver Suit for Leading-edge Dimmer, Trailing-edge Dimmer, R Type, R-C Type or R-L Type Dimmer SOIC-8 Figure 1. Package Type of AP1681 Jul. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 1 Preliminary Datasheet Off-line Primary Side Regulation Controller for Dimmable LED Driver AP1681 Pin Configuration M Package (SOIC-8) DIM 1 8 VCC RD 2 7 OUT RI 3 6 GND FB 4 5 CS Figure 2. Pin Configuration of AP1681 (Top View) Pin Description Pin Number Pin Name 1 DIM Dimming control signal input 2 RD Full brightness level setting 3 RI Full dimming level setting 4 FB The feedback voltage sensing from the auxiliary winding 5 CS Primary current sensing 6 GND Ground. Current return for gate driver and control circuits of the IC 7 OUT Gate driver output 8 VCC Supply voltage of gate driver and control circuits of the IC Jul. 2011 Function Rev. 1. 2 BCD Semiconductor Manufacturing Limited 2 Preliminary Datasheet Off-line Primary Side Regulation Controller for Dimmable LED Driver AP1681 Functional Block Diagram VCC 8 8V FB_OVP COMP 1.75V FB 4 COMP SHORT_OCP VCC_OVP FB_OVP OTP 0.1V Reference VCC_OVP Tonsec Detector CC_CTRL CS pro Demag COMP COMP 4V Protection & Latch FB_ACC Tons Constant Current Control CC_CTRL CV_CTRL 5 Regulator & Bias UVLO CC_ON pro COMP SHORT_OCP 4V pfm R CC_ON Driver 7 OUT Q S 0.5V COMP PEAK_CTRL 6 S DIM 1 Dimming Control 2 RD Q GND CC_CTRL R 3 RI Figure 3. Functional Block Diagram of AP1681 Jul. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 3 Preliminary Datasheet Off-line Primary Side Regulation Controller for Dimmable LED Driver AP1681 Ordering Information AP1681 - Circuit Type G1: Green Package M: SOIC-8 Package Temperature Range SOIC-8 -40 to 105°C TR: Tape & Reel Blank: Tube Part Number Marking ID Packing Type AP1681M-G1 1681M-G1 Tube AP1681MTR-G1 1681M-G1 Tape & Reel BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant and green. Jul. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 4 Preliminary Datasheet Off-line Primary Side Regulation Controller for Dimmable LED Driver AP1681 Absolute Maximum Ratings (Note 1) Parameter Symbol Value Unit Power Supply Voltage VCC -0.3 to 30 V Driver Output Current IOUT ±300 mA VRD, VRI, VDIM, VCS -0.3 to 7 V VFB -40 to 10 V TJ 150 ºC Storage Temperature TSTG -65 to 150 ºC Lead Temperature (Soldering, 10 sec) TLEAD 300 ºC Power Dissipation at TA=50°C PD 0.65 W Thermal Resistance (Junction-to-Ambient) θJA 150 °C/W ESD (Machine Model) 200 V ESD (Human Body Model) 4000 V Voltage at RD, RI, DIM, CS FB Input Voltage Operating Junction Temperature Note 1: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability. Recommended Operating Conditions Parameter Symbol Min Max Unit Power Supply Voltage VCC 10.8 21.5 V Ambient Temperature TA -40 105 ºC Jul. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 5 Preliminary Datasheet Off-line Primary Side Regulation Controller for Dimmable LED Driver AP1681 Electrical Characteristics VCC =15V, TA=25°C, unless otherwise specified. Parameter Symbol Conditions Min Typ Max 16.5 19 21.5 7.2 9 10.8 1.7 10 900 1100 Unit UVLO Section Start-up Threshold Minimal Operating Voltage VTH (ST) VOPR (Min) After turn on V Standby Current Section Start-up Current IST VCC=VTH (ST)-0.5V, Before start up Operating Current ICC Static 700 µA Drive Output Section IGD-SOURCE=20mA VCC=12V IGD-SINK=20mA VCC=12V Output High Level Voltage VOH Output Low Level Voltage VOL Output Voltage Rise Time tR CL=1nF 120 Output Voltage Fall Time tF CL=1nF Output Clamp Voltage VO-CLAMP UVLO Saturation Voltage VUVLO Maximum Switch On-time tONP_MAX IGD-SOURCE=5mA VCC=20V VCC=0 to VCC–ON ISINK=10mA 8 V 1 V 220 320 ns 30 50 90 ns 11 13 15 V 1 V µs 16.5 DIM Input Section ∆VRI/∆VDIM Voltage Gain to RI -1.2 -1.1 -1.0 Internal Source Current 11 20 35 µA Reload Threshold 0.8 1 1.25 V 1.3 1.5 1.75 V RD and RI Section RD Pin Voltage VRD Maximum RD Current 150 µA Maximum RI Current 250 µA Current Sense Section Current Sense Voltage Maximum CS Current VCS 450 VDIM=0 Leading Edge Blanking Jul. 2011 Rev. 1. 2 500 560 mV 120 µA 600 ns BCD Semiconductor Manufacturing Limited 6 Preliminary Datasheet Off-line Primary Side Regulation Controller for Dimmable LED Driver AP1681 Electrical Characteristics (Continued) VCC =15V, TA=25°C, unless otherwise specified. Parameter Symbol Conditions Min Typ Max Unit 3.0 4.0 5.0 V 1.0 2 3.0 µA 1.35 1.75 2.15 V 6.5 8 9.5 V Feedback Input Section CV Feedback Threshold VFB-CV FB Pin Input Leakage Current Acceleration Start Threshold VFB=4V IFB Over Voltage Protection VFB-OVP Over Temperature Protection Section Shutdown Temperature Temperature Hysteresis 140 o 20 o C C Typical Performance Characteristics 10.0 Minimal Operating Voltage (V) 19.0 Start-up Voltage (V) 18.8 18.6 18.4 18.2 18.0 -40 -20 0 20 40 60 80 100 9.0 8.5 -40 120 o -20 0 20 40 60 80 100 120 o Ambient Temperature ( C) Ambient Temperature ( C) Figure 4. Start-up Voltage vs. Ambient Temperature Jul. 2011 9.5 Figure 5. Minimal Operating Voltage vs. Ambient Temperature Rev. 1. 2 BCD Semiconductor Manufacturing Limited 7 Preliminary Datasheet Off-line Primary Side Regulation Controller for Dimmable LED Driver AP1681 Typical Performance Characteristics (Continued) 2.2 940 920 Operating Current (µA) Start-up Current (µA) 2.0 1.8 1.6 900 880 860 840 820 1.4 -40 -20 0 20 40 60 80 100 800 -40 120 -20 0 20 40 60 80 100 120 o o Ambient Temperature ( C) Ambient Temperature ( C) Figure 7. Operating Current vs. Ambient Temperature Figure 6. Start-up Current vs. Ambient Temperature 540 1000 Current Sense Voltage (mV) 900 Operating Current (µA) 800 700 600 500 400 300 200 520 500 480 100 0 460 0 5 10 15 20 25 30 22 24 26 28 30 Supply Voltage (V) Supply Voltage (V) Figure 8. Operating Current vs. Supply Voltage Jul. 2011 20 Figure 9. Current Sense Voltage vs. Supply Voltage Rev. 1. 2 BCD Semiconductor Manufacturing Limited 8 Preliminary Datasheet Off-line Primary Side Regulation Controller for Dimmable LED Driver AP1681 Typical Performance Characteristics (Continued) 4.4 530 4.3 CV Feedback Threshold (V) Current Sense Voltage (mV) 520 510 500 490 4.1 4.0 3.9 480 470 -40 4.2 -20 0 20 40 60 80 100 3.8 -40 120 -20 0 20 40 60 80 100 120 o Ambient Temperature ( C) Ambient Temperature ( C) Figure 10. Current Sense Voltage vs. Ambient Temperature Figure 11. CV Feedback Threshold vs. Ambient Temperature o 9.0 4.3 8.9 Over Voltage Protection (V) CV Feedback Threshold (V) 4.2 4.1 4.0 3.9 3.8 3.7 3.6 20 8.7 8.6 8.5 8.4 8.3 8.2 8.1 22 24 26 28 8.0 -40 30 -20 0 20 40 60 80 100 120 o Supply Voltage (V) Ambient Temperature ( C) Figure 12. CV Feedback Threshold vs. Supply Voltage Jul. 2011 8.8 Figure 13. Over Voltage Protection vs. Ambient Temperature Rev. 1. 2 BCD Semiconductor Manufacturing Limited 9 Preliminary Datasheet Off-line Primary Side Regulation Controller for Dimmable LED Driver AP1681 Typical Performance Characteristics (Continued) 15 14 Output Clamp Voltage (V) FB Input Leakage Current (µA) 3.0 2.5 2.0 1.5 13 12 11 1.0 -40 -20 0 20 40 60 80 100 10 20 120 22 24 26 28 30 Supply Voltage (V) o Ambient Temperature ( C) Figure 14. FB Input Leakage Current vs. Ambient Temperature Figure 15. Output Clamp Voltage vs. Supply Voltage 1.70 RD Pin Voltage (V) 1.65 1.60 1.55 1.50 1.45 -40 -20 0 20 40 60 80 100 120 o Ambient Temperature ( C) Figure 16. RD Pin Voltage vs. Ambient Temperature Jul. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 10 Preliminary Datasheet Off-line Primary Side Regulation Controller for Dimmable LED Driver AP1681 Typical Application EE16 L=1.43mH VREC 120Vac 60Hz 47nF Dimmer EE16 L=4.5mH ~ + ~ 115T VBUS 47k 22nF 11T 470k 1A/600V GND ZCD 560k 3N60 100pF 630V GD 47 MULT 3.3k + 6.8 F 350V CS 1nF VCC COMP INV 680k 330nF 0.47 F 2R AP1661 560k 680k 680k 16k BAV20 SR 3A/150V 220 F 35V AP1681 LED Application: 330k Dimmable LED Driver Input: 120Vac/60Hz 18W Power Output: 8 LEDs, 26VLOAD 5.0mA to 550mA 32 VOPEN 330k VOUT BAV20 220k 47k 14T 2.2nF 630V φ=0.3 68k 95T 0.16×3 19T + φ=0.4 27k TIW 270k 10k 0.47 F VCC FR105 EF20 L=2.54mH FB 100 OUT 100k 4N60 Y2 1.5nF 3kV DIM 1 F 16k CS 0.47 F 3.0k RD RI GND 1.3R AP1681 51k 100k Figure 17. Typical Application of AP1681 Jul. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 11 Preliminary Datasheet Off-line Primary Side Regulation Controller for Dimmable LED Driver AP1681 Mechanical Dimensions Unit: mm(inch) R0.150(0.006) SOIC-8 Jul. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 12 BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com IMPORTANT NOTICE IMPORTANT NOTICE BCD Semiconductor BCD Semiconductor Manufacturing Manufacturing Limited Limited reserves reserves the the right right to to make make changes changes without without further further notice notice to to any any products products or or specifispecifications herein. cations herein. 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