XL1682

XL1682 SOP8 Description Pin Assignments The XL1682 is a high performance AC/DC universal input Primary Side Regulation Power Factor Controller for LED driver applications. The device uses Pulse Frequency Modulation (PFM) technology to regulate output current while achieving high power factor and low THD. (Top View) The XL1682 provides accurate constant current (CC) regulation while removing the opto-coupler and secondary control circuitry. It also eliminates the need of loop compensation circuitry while maintaining stability. The XL1682 achieves excellent regulation and high efficiency, yet meets the requirement of IEC61000-3-2 harmonic standard.  Features         8 VCC VS 2 7 OUT VPK 3 6 GND CS 4 5 FB Applications The XL1682 is available in SO-8 package.    1 SO-8 The XL1682 features low start -up current, low operation current and high efficiency. It also has rich protection features including over voltage, short circuit, over current protection etc.  NC Primary Side Control for Output Current Regulation Without Opto-coupler and Secondary CV/CC Control Circuitry Low Start-up Current High Power Factor and Low THD for Universal Input Range Tight CC Regulation Performance for Universal Input Mains Voltage Range Eliminates Control Loop Compensation Circuitry Built-in Acceleration Start Open-load and Reload Detection Over Voltage and Short Circuit Protection Over Current Protection Cost Effective Total PFC LED Driver Solution Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) 1 Single Stage Power Factor Correction Power Supply for LED Lighting XL1682 SOP8 T1 L1 C6 R8 R3 R1 1 R19 D3 ZD2 R20 + D2 5 DB1 F1 AC Input R18 R4 R10 R15 D1 3 ZD1 C1 VR1 OUT C7 R9 C2 C5 R16 8 VCC R7 3 R5 FB CY1 XL1682 2 VS R6 4 VPK C4 R2 5 GND 6 C3 R17 R11 OUT 7 CS 4 Q1 R12 R13 R14 L2 Pin Descriptions Pin Number 1 Pin Name NC 2 VS 3 VPK 4 CS 5 FB 6 7 8 GND OUT VCC Function No connection The rectified input voltage sensing pin. The pin is detecting the instantaneous rectified sine waveform of input voltage The rectified input voltage peak value sensing pin. The pin is detecting the rectified sine waveform peak value of input voltage Primary current sensing This pin captures the feedback voltage from the auxiliary winding. FB voltage is used to control no load output voltage and determine acceleration stop point at start-up phase Ground. Current return for gate driver and control circuits of the IC Gate driver output Supply voltage of gate driver and control circuits of the IC Functional Block Diagram VCC 8 UVLO FB pro OVP 5 Regulator & Bias 0.1V COMP PFM 1.8 Tonsec Detector Tons Acceleration Start Control EA UVLO Q R CV_CTRL PFM Driver 7 OUT S CS VS 4 2 Peak Current Control & LEB Input Current Shaping and Constant Current Control R S 3 VPK 2 Q CC_CTRL 6 GND XL1682 SOP8 Symbol Parameter Rating Unit VCC Power Supply Voltage -0.3 to +35 V IOUT Driver Output Current 300 mA Voltage at VS, VPK, CS -0.3 to 7 V FB Input Voltage -40 to 10 V +150 °C -65 to +150 °C VVS, VPK, VCS VFB TJ Operating Junction Temperature TSTG Storage Temperature TLEAD Lead Temperature (Soldering, 10 sec) +300 °C PD Power Dissipation (TA = +50C) 0.65 W θJA Thermal Resistance (Junction to Ambient) 190 °C/W – ESD (Machine Model) 200 V – ESD (Human Body Model) 3000 V Note 4: 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 Symbol Parameter Min Max Unit VCC Power Supply Voltage 9 21 V TA Ambient Temperature -40 +105 °C 3 XL1682 SOP8 Electrical Characteristics (@ VCC = 15V, TA = +25°C, unless otherwise specified.) Symbol Parameter Conditions Min Typ Max Unit UVLO Section Start-up Threshold – 18 19 20 V Minimal Operating Voltage After turn on 7.5 8 8.5 V VCC OVP Voltage – 28 32 34 V Start-up Current VCC = VTH (ST)-0.5V, Before start up – – 20 µA Maximum Operating Current VVS = VPK = 3V – 1000 1300 µA VOH Output High Level Voltage IGD-SOURCE = 20mA VCC = 12V 10 – – V VOL Output Low Level Voltage IGD-SINK = 20mA VCC = 12V – – 1 V tR Output Voltage Rise Time CL = 1nF 100 140 190 ns tF Output Voltage Fall Time CL = 1nF 30 60 90 ns Output Clamp Voltage IGD-SOURCE = 5mA VCC = 20V 12 13.5 15 V UVLO Saturation Voltage VCC = 0 to VCC –ON ISINK = 10mA – – 1.1 V VVS/VPK (Max) Maximum Ratio VVS = VPK = 3V 0.8 1 1.2 V VVS/VPK (Min) Minimum Ratio VVS = 0V, VPK = 3V – – 0.2 V Minimum On Time – 500 750 1000 ns Short Circuit Protection Voltage – 3 4 – V FB Pin Input Leakage Current VFB = 4V – 2 8 µA Acceleration Start Threshold – 1.4 1.8 2.2 V CV Threshold – 3.8 4.1 4.4 V Over Voltage Protection – 5.6 6.25 6.9 V VTH (ST) VOPR (Min) VCC_OVP Standby Current Section IST ICC (Max) Drive Output Section VO-CLAMP VUVLO VS Input Section Current Sense Section tON (Min) VSOCP Feedback Input Section IFB VFB (ACC) VFB (CV) VFB (OVP) Over Temperature Protection Section – Shutdown Temperature – – +140 – °C – Temperature Hysteresis – – +20 – °C 4 XL1682 SOP8 Supply Current vs. Supply Voltage CV Threshold vs. Supply Voltage 1100 4.2 1000 900 CV Threshold (V) Supply Current (A) 800 700 600 500 400 4.0 3.8 300 200 100 3.6 0 8 0 5 10 15 20 25 10 12 14 18 20 22 24 26 28 30 Supply Voltage (V) Supply Voltage (V) Output Clamp Voltage vs. Supply Voltage Start-up Voltage vs. Ambient Temperature 19.4 14 13 19.2 12 Start-up Voltage (V) Output Clamp Voltage (V) 16 30 11 10 9 8 19.0 18.8 18.6 18.4 7 18.2 6 5 8 10 12 14 16 18 20 22 24 26 28 18.0 -40 30 -20 Supply Voltage (V) 0 20 40 60 80 100 120 o Ambient Temperature ( C) Minimal Operating Voltage vs. Ambient Temperature Start-up Current vs. Ambient Temperature 8.3 8.0 7.0 8.2 6.5 Start-up Current (A) Minimal Operating Voltage (V) 7.5 8.1 8.0 6.0 5.5 5.0 4.5 4.0 3.5 7.9 3.0 2.5 7.8 -40 -20 0 20 40 60 80 100 2.0 -40 120 o -20 0 20 40 60 80 o Ambient Temperature ( C) Ambient Temperature ( C) 5 100 120 XL1682 SOP8 Operating Current vs. Ambient Temperature CV Threshold vs. Ambient Temperature 4.50 1050 4.25 CV Threshold (V) Operating Current (A) 1000 950 900 3.75 3.50 850 800 -40 3.25 -20 0 20 40 60 80 100 3.00 -40 120 o Ambient Temperature ( C) 2.5 2.0 1.5 -20 0 20 40 60 0 20 40 60 80 Ambient Temperature ( C) 3.0 1.0 -40 -20 o FB Input Leakage Current vs. Ambient Temperature FB Input Leakage Current (A) 4.00 80 100 120 o Ambient Temperature ( C) 6 100 120 XL1682 SOP8 76 XL1682 SOP8 78