Data Sheet WHITE LED STEP-UP CONVERTER AP3009 General Description Features The AP3009 is an inductor-based DC/DC converter designed to drive up to six white LEDs in series for backlight. Only one feedback resistor is needed to control the LED current and obtain satisfied brightness. · · · · · · · · A constant frequency 1.2MHz PWM control scheme is employed in this IC, which means the tiny external components can be used. In fact, 1mm tall inductor and 0.22µF output capacitor for the typical application is very appropriate. Additionally, the schottky diode in boost circuit is integrated in this chip. AP3009 also provide a disable port to ease its use for different systems. Inherently Uniform LED Current High Efficiency: 83% Typical No Need for Extra Schottky Diode Over Output Voltage Protection Drives 2 to 6 LEDs Fast 1.2MHz Switching Frequency Uses Tiny 1mm Tall Inductor Requires Only 0.22µF Output Capacitor Applications · · · · · The over output voltage protection is equipped in AP3009. When any LED is broken or in other abnormal conditions, the output voltage will be clamped to 30V. Cellular Phones Digital Cameras LCD modules GPS Receivers PDAs, Handheld Computers The AP3009 is available in standard SOT-23-6 package. SOT-23-6 Figure 1. Package Type of AP3009 Apr. 2007 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 1 Data Sheet WHITE LED STEP-UP CONVERTER AP3009 Pin Configuration K Package (SOT-23-6) VOUT 1 6 SW GND 2 5 VIN FB 3 4 CTRL Figure 2. Pin Configuration of AP3009 (Top View) Pin Description Pin Number Pin Name Function 1 VOUT Output Pin. Connected to the cathode of internal schottky diode 2 GND Ground Pin 3 FB 4 CTRL 5 VIN Input Supply Pin. Must be locally bypassed 6 SW Switch Pin. Connect external inductor Voltage Feedback. Reference voltage is 200mV Shutdown and Dimming Pin. Connect to 1.8V or higher to enable device; Connect to 50mV or less to disable device; Connect to a voltage between 1.8V and 50mV to achieve linear dimming Apr. 2007 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 2 Data Sheet WHITE LED STEP-UP CONVERTER AP3009 Functional Block Diagram FB SW 3 VIN 5 VREF 1.25 V 6 200 mV 1 OVP DRIVER A1 A2 Q R VOUT Q1 S COMPARATOR Σ CTRL 2 4 GND RAMP GENERATOR 1.2 MHz OSCILLATOR Figure 3. Functional Block Diagram of AP3009 Ordering Information AP3009 - Circuit Type E1: Lead Free Package TR: Tape and Reel K: SOT-23-6 Package SOT-23-6 Temperature Range o -40 to 85 C Part Number Marking ID Packing Type AP3009KTR-E1 E9T Tape & Reel BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Apr. 2007 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 3 Data Sheet WHITE LED STEP-UP CONVERTER AP3009 Absolute Maximum Ratings (Note 1) Parameter Symbol Value Unit VIN 20 V SW Voltage 30 V FB Voltage 20 V CTRL Voltage 20 V 265 oC/W 150 oC TSTG -65 to 150 oC TLEAD 260 oC ESD (Machine Model) 250 V ESD (Human Body Model) 2000 V Input Voltage Thermal Resistance (Junction to Atmosphere, no Heat sink) RθJA Operating Junction Temperature Storage Temperature Range Lead Temperature (Soldering, 10sec) 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 Operating Temperature Range TOP -40 85 oC Input Voltage VIN 2.5 16 V CTRL Voltage VCTRL 16 V Apr. 2007 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 4 Data Sheet WHITE LED STEP-UP CONVERTER AP3009 Electrical Characteristics (VIN=3V, VCTRL =3V, TA=25oC, unless otherwise specified.) Parameter Symbol Minimum Operating Voltage VIN(min) Maximum Operating Voltage VIN(max) Conditions Min Typ Max Unit 2.5 V 16 IOUT=20mA, 4 LEDs, Feedback Voltage VFB FB Pin Bias Current IFB Supply Current ICC VFB=VIN, Not Switching Supply Current IQ VCTRL=0V TA=-40oC to 85oC 188 200 212 mV 35 100 nA 1.9 2.6 3.3 mA 2.0 3.2 5.0 µA 1.6 MHz Switching Frequency f 0.8 1.2 Maximum Duty Cycle DMAX 90 93 Switch Current Limit (Note 2) ILIMIT Switch VCE Saturation Voltage VCESAT Switch Leakage Current CTRL Pin Voltage VCTRL TA=25oC, D=40% 560 TA=25oC, D=80% 465 ISW=250mA 300 VSW=5V 0.01 High Schottky Forward Drop Schottky Leakage Current ICTRL VDROP mA mV 5 1.8 µA V Low CTRL Pin Bias Current % 0.05 48 60 72 TA=85oC 40 50 60 TA=-40oC 60 75 90 ID=150mA 0.7 VR=25V V 4 VR=30V µA µA 90 Note 2: The Switch Current Limit is related to Duty Cycle. Please refer to Figure 16 for detail. Apr. 2007 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 5 Data Sheet WHITE LED STEP-UP CONVERTER AP3009 Typical Performance Characteristics 85 85 84 84 Efficiency (%) Efficiency (%) (VF of WLED is 3.45V @ IF=20mA, unless otherwise noted ) 83 82 83 82 o VIN=3.6V, IOUT=20mA, 4 LEDs CIN=1µF, COUT=0.22µF, L=22µH 81 80 -50 -25 0 25 50 75 4 LEDs, IOUT=20mA, TA=25 C CIN=1µF, COUT=0.22µF, L=22µH 81 80 2.5 100 3.0 o Figure 4. Efficiency vs. Junction Temperature 4.0 4.5 5.0 Figure 5. Efficiency vs. Input Voltage 86 Schottky Forward Current (mA) 350 84 Efficiency (%) 3.5 Input Voltage (V) Junction Temperature ( C) 82 80 o VIN=3.6V, IOUT=20mA, TA=25 C CIN=1µF, COUT=0.22µF, L=22µH 78 3 4 5 250 200 150 100 50 76 2 300 0 6 0 LEDs (pcs) 200 400 600 800 1000 Schottky Forward Drop (mV) Figure 6. Efficiency vs. LED's Number Figure 7. Schottky Forward Current vs. Schorttky Forward Drop Apr. 2007 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 6 Data Sheet WHITE LED STEP-UP CONVERTER AP3009 Typical Performance Characteristics (Continued) (VF of WLED is 3.45V @ IF=20mA, unless otherwise noted ) 3.5 3.0 25 Supply Current (mA) Shutdown Quiescent Current (µA) 30 20 15 10 5 2.5 2.0 1.5 o 1.0 25 C o 100 C o -50 C 0.5 0.0 0 4 6 8 10 12 14 0 16 2 4 Input Voltage (V) Figure 8. Shutdown Quiescent Current vs. Input Voltage 8 10 12 14 16 Figure 9. Supply Current vs. Input Voltage 5.0 Input Current in Ouput Open Circuit (mA) 32.0 31.5 Output Clamp Voltage (V) 6 Input Voltage (V) 31.0 30.5 30.0 29.5 29.0 28.5 4 6 8 10 12 14 4.6 4.4 4.2 4.0 3.8 3.6 3.4 3.2 2.5 28.0 2 4.8 16 3.0 3.5 4.0 4.5 5.0 Input Voltage (V) Input Voltage (V) Figure 10. Output Clamp Voltage vs. Input Voltage Figure 11. Input Current in Output Open Circuit vs. Input Voltage Apr. 2007 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 7 Data Sheet WHITE LED STEP-UP CONVERTER AP3009 Typical Performance Characteristics (Continued) 1.25 202 1.20 201 Feedback Voltage (mV) Switching Frequency (MHz) (VF of WLED is 3.45V @ IF=20mA, unless otherwise noted ) 1.15 1.10 1.05 1.00 0.95 -50 200 199 198 197 -25 0 25 50 75 196 -50 100 -25 o 0 25 50 Figure 13. Feedback Voltage vs. Junction Temperature vs. Junction Temperature 1.0 0.80 VR=10V VR=16V VR=25V Schottky Leakage Current (uA) Schottky Forward Drop (V) 0.78 0.76 0.74 0.72 0.70 0.68 0.66 0.64 0.60 -50 100 Junction Temperature ( C) Figure 12. Switching Frequency 0.62 75 o Junction Temperature ( C) 0.8 0.6 0.4 0.2 ID=150mA -25 0 25 50 75 0.0 -50 100 o -25 0 25 50 75 100 o Junction Temperature ( C) Junction Temperature ( C) Figure 14. Schottky Forward Drop vs. Junction Temperature Figure 15. Schottky Leackage Current vs. Junction Temperature Apr. 2007 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 8 Data Sheet WHITE LED STEP-UP CONVERTER AP3009 Typical Performance Characteristics (Continued) (VF of WLED is 3.45V @ IF=20mA, unless otherwise noted ) 400 700 o Switching Current Limit (mA) 600 Switch Saturation Voltage (mV) -50 C o 25 C o 100 C 500 400 300 200 100 30 40 50 60 70 80 90 350 300 250 200 150 100 50 50 100 100 150 200 250 300 Switch Current (mA) Duty Cycle (%) Figure 17. Switch Saturation Voltage Figure 16. Switch Current Limit vs. Duty Cycle vs. Switch Current 250 Feedback Voltage (mV) 200 150 100 50 0 0.0 0.5 1.0 1.5 2.0 CTRL Pin Voltage (V) Figure 18. Feedback Voltage vs. CTRL Pin Voltage Apr. 2007 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 9 Data Sheet WHITE LED STEP-UP CONVERTER AP3009 Typical Application VIN ≥ 3V 22µΗ VIN Control Signal SW VOUT AP3009 CTRL GND 0.22µF FB 1µF 10Ω a. Four White LEDs Driver VIN ≥ 3V 22µΗ VIN Control Signal SW VOUT AP3009 CTRL GND 0.22µF FB 1µF 10Ω b. Five White LEDs Driver Apr. 2007 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 10 Data Sheet WHITE LED STEP-UP CONVERTER AP3009 Typical Application (Continued) VIN ≥ 3V 22µΗ VIN Control Signal SW VOUT AP3009 CTRL GND 0.22µF FB 1µF 10Ω c. Six White LEDs Driver C: X5R or X7R Dielectric L: SUMIDA CDRH5D28R-220NC or Equivalent All these circuits can work in full temperature Figure 19. Typical White LED Drivers Apr. 2007 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 11 Data Sheet WHITE LED STEP-UP CONVERTER AP3009 Mechanical Dimensions SOT-23-6 Unit: mm(inch) 0° 2.820(0.111) 8° 3.020(0.119) 0.300(0.012) 0.400(0.016) 5 0.300(0.012) 0.600(0.024) 4 1.500(0.059) 1.700(0.067) 2.650(0.104) 2.950(0.116) 6 0.200(0.008) Pin 1 Dot by Marking 1 2 3 0.700(0.028)REF 0.950(0.037)TYP 0.000(0.000) 0.100(0.004) 1.800(0.071) 2.000(0.079) 0.100(0.004) 0.200(0.008) 1.050(0.041) 1.050(0.041) 1.150(0.045) 1.250(0.049) Apr. 2007 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 12 http://www.bcdsemi.com IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifications herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or other rights nor the rights of others. MAIN SITE BCD Semiconductor Manufacturing Limited BCD Semiconductor Manufacturing Limited - Wafer Fab Shanghai SIM-BCD Semiconductor Manufacturing Limited 800, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6485 1491, Fax: +86-21-5450 0008 - IC Design Group Advanced Analog Circuits (Shanghai) Corporation 8F, Zone B, 900, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6495 9539, Fax: +86-21-6485 9673 REGIONAL SALES OFFICE Shenzhen Office Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd. 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