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| Preliminary Datasheet WHITE LED STEP-UP CONVERTER General Description The AP3030 is an inductor-based DC/DC converter designed to drive up to eight white LEDs in series or 2 rows of LEDs with 5 for each in parallel for backlight. Only one feedback resistor is needed to control the LED current and obtain required brightness. A constant frequency 1.2MHz PWM control scheme is employed in this IC, which means tiny external components can be used. Specifically, 1mm tall inductor and 0.22F output capacitor for a typical application are sufficient. Additionally, the schottky diode in boost circuit is integrated on this chip. AP3030 also provides a disable pin to ease its use for different systems. The output over-voltage protection is implemented in AP3030. When any LED is broken or in other abnormal conditions, the output voltage will be clamped to 30V. The AP3030 is available in standard SOT-23-6 and TSOT-23-6 packages. AP3030 Features * * * * * * * * Inherently Uniform LED Current High Efficiency up to 84% No Need for External Schottky Diode Output Over-Voltage Protection (OVP) Drives up to 8 LEDs in Series or 2 Rows of LEDs with 5 for Each in Parallel Fixed 1.2MHz Switching Frequency Uses Tiny 1mm Tall Inductor Requires Only 0.22F Output Capacitor Applications * * * * * Cellular Phones Digital Cameras LCD modules GPS Receivers PDAs, Handheld Computers SOT-23-6 TSOT-23-6 Figure 1. Package Types of AP3030 Aug. 2008 Rev. 1. 1 1 BCD Semiconductor Manufacturing Limited Preliminary Datasheet WHITE LED STEP-UP CONVERTER Pin Configuration K/KT Package (SOT-23-6/TSOT-23-6) Pin 1 Dot by Marking AP3030 SW GND FB 1 2 3 6 5 4 VIN VOUT CTRL Figure 2. Pin Configuration of AP3030 (Top View) Pin Description Pin Number 1 2 3 4 5 6 Pin Name SW GND FB CTRL VOUT VIN Switch Pin. Connect external inductor Ground 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 Output Pin. Connected to the cathode of internal schottky diode Input Supply Pin. Must be locally bypassed Function Aug. 2008 Rev. 1. 1 2 BCD Semiconductor Manufacturing Limited Preliminary Datasheet WHITE LED STEP-UP CONVERTER Functional Block Diagram FB 3 SOFT START AP3030 SW 1 5 VOUT VIN 6 VREF 1.25 V 200 mV A1 A2 COMPARATOR R S Q DRIVER Q1 OVP 2 CTRL 4 RAMP GENERATOR GND 1.2 MHz OSCILLATOR Figure 3. Functional Block Diagram of AP3030 Ordering Information AP3030 Circuit Type Package K: SOT-23-6 KT: TSOT-23-6 E1: Lead Free G1: Green TR: Tape and Reel Package SOT-23-6 TSOT-23-6 Temperature Range -40 to 85oC -40 to 85 C o Part Number Lead Free AP3030KTR-E1 AP3030KTTR-E1 Green AP3030KTR-G1 Marking ID Lead Free EEB GEB L9G Green Packing Type Tape & Reel Tape & Reel AP3030KTTR-G1 S9G BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with "G1" suffix are available in green packages. Aug. 2008 Rev. 1. 1 3 BCD Semiconductor Manufacturing Limited Preliminary Datasheet WHITE LED STEP-UP CONVERTER Absolute Maximum Ratings (Note 1) Parameter Input Voltage SW Voltage FB Voltage CTRL Voltage Thermal Resistance (Junction to Atmosphere, No Heat Sink) Operating Junction Temperature Storage Temperature Range Lead Temperature (Soldering, 10sec) ESD (Machine Model) ESD (Human Body Model) Symbol VIN VSW VFB VCTRL RJA TJ TSTG TLEAD Value 20 30 20 20 265 150 -65 to 150 260 250 2000 Unit V V V V oC/W o o o AP3030 C C C V V 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 Operating Temperature Range Input Voltage CTRL Voltage Symbol TOP VIN VCTRL Min -40 2.5 Max 85 16 16 Unit o C V V Aug. 2008 Rev. 1. 1 4 BCD Semiconductor Manufacturing Limited Preliminary Datasheet WHITE LED STEP-UP CONVERTER Electrical Characteristics (VIN=3V, VCTRL =3V, TA=25oC, unless otherwise specified.) Parameter Minimum Operating Voltage Maximum Operating Voltage Feedback Voltage FB Pin Bias Current Quiescent Current Shutdown Quiescent Current Switch Frequency Maximum Duty Cycle Switch Current Limit (Note 2) Switch VCE Saturation Voltage Switch Leakage Current CTRL Pin Voltage VCTRL Symbol VIN(min) VIN(max) VFB IFB IQ ISHDN f DMAX ILIMIT VCESAT D=40% D=80% ISW=250mA VSW=5V High Low 40 CTRL Pin Bias Current ICTRL TA=85oC TA=-40oC Schottky Forward Drop Schottky Leakage Current Soft Start Time t VDROP ID=150mA VR=23V VR=27V 300 55 50 75 0.7 0.1 4 150 S V A 1.8 0.05 72 A VFB=VIN, no switching VCTRL=0V 1.5 2.0 0.9 90 IOUT=20mA, 4 LEDs, TA=-40oC to 85oC 188 200 35 2.5 3.2 1.2 93 550 550 360 0.01 5 mV A V Conditions Min 2.5 V 16 212 100 3.2 5.0 1.5 mV nA mA A MHz % mA Typ Max Unit AP3030 Note 2: The switch current limit is related to duty cycle. Please refer to Figure 16 for detail. Aug. 2008 Rev. 1. 1 5 BCD Semiconductor Manufacturing Limited Preliminary Datasheet WHITE LED STEP-UP CONVERTER Typical Performance Characteristics (VF(forward voltage) of WLED is 3.45V @ IF=20mA, unless otherwise noted ) AP3030 83 82 81 86 84 82 80 Efficiency (%) Efficiency (%) 79 78 77 76 75 74 73 -50 80 78 76 74 72 70 3.0 VIN=3.6V, IOUT=20mA, 8LEDs CIN=1F, COUT=0.22F, L=22H IOUT=20mA, 8LEDs,TA=25 C CIN=1F, COUT=0.22F, L=22H O -25 0 25 50 o 75 100 3.5 4.0 4.5 5.0 Junction Temperature ( C) Input Voltage (V) Figure 4. Efficiency vs. Junction Temperature Figure 5. Efficiency vs. Input Voltage 350 86 85 84 83 300 Schottky Forward Current (mA) 250 Efficiency (%) 82 81 80 79 78 77 76 2 3 4 5 6 7 8 O 200 150 100 VIN=3.6V, IOUT=20mA,TA=25 C CIN=1F, COUT=0.22F, L=22H 50 0 0 200 400 600 800 1000 LED's Number Schottky Forward Drop (mV) Figure 6. Efficiency vs. LED's Number Figure 7. Schottky Forward Current vs. Schottky Forward Drop Aug. 2008 Rev. 1. 1 6 BCD Semiconductor Manufacturing Limited Preliminary Datasheet WHITE LED STEP-UP CONVERTER Typical Performance Characteristics (Continued) (VF(forward voltage) of WLED is 3.45V @ IF=20mA, unless otherwise noted ) AP3030 30 3.0 Shutdown Quiescent Current (A) 25 2.5 Quiescent Current (mA) 20 2.0 15 1.5 10 1.0 5 0.5 -50 C O 25 C O 100 C O 0 2 4 6 8 10 12 14 16 0.0 0 2 4 6 8 10 12 14 16 Input Voltage (V) Input Voltage (V) Figure 8. Shutdown Quiescent Current vs. Input Voltage Figure 9. Quiescent Current vs. Input Voltage 36 6.0 5.5 34 Output Clamp Voltage (V) 5.0 Input Current (mA) 32 4.5 4.0 3.5 3.0 30 28 2.5 26 2 4 6 8 10 12 14 16 2.0 2.5 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 Aug. 2008 Rev. 1. 1 7 BCD Semiconductor Manufacturing Limited Preliminary Datasheet WHITE LED STEP-UP CONVERTER Typical Performance Characteristics (Continued) (VF(forward voltage) of WLED is 3.45V @ IF=20mA, unless otherwise noted ) AP3030 1.40 1.35 1.30 210 208 206 Feedback Voltage (mV) 1.25 204 202 200 198 196 194 192 190 -50 Frequency (MHz) 1.20 1.15 1.10 1.05 1.00 0.95 0.90 -50 -25 0 25 50 o 75 100 -25 0 25 50 o 75 100 Junction Temperature ( C) Junction Temperature ( C) Figure 12. Switch Frequency vs. Junction Temperature Figure 13. Feedback Voltage vs. Junction Temperature 0.80 0.78 0.50 0.45 Schottky Leakage Current (A) VR=10V VR=16V VR=23V 0.76 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0.00 -50 Schottky Forward Drop (V) 0.74 0.72 0.70 0.68 0.66 0.64 0.62 0.60 -50 -25 0 25 50 o 75 100 -25 0 25 50 o 75 100 Junction Temperature ( C) Junction Temperature ( C) Figure 14. Schottky Forward Drop vs. Junction Temperature Figure 15. Schottky Leakage Current vs. Junction Temperature Aug. 2008 Rev. 1. 1 8 BCD Semiconductor Manufacturing Limited Preliminary Datasheet WHITE LED STEP-UP CONVERTER Typical Performance Characteristics (Continued) (VF(forward voltage) of WLED is 3.45V @ IF=20mA, unless otherwise noted ) AP3030 700 450 400 350 300 250 200 150 100 50 50 600 500 400 300 200 -50 C O 25 C O 100 C 40 50 60 70 80 90 O 100 30 Saturation Voltage (mV) Current Limit (mA) 100 150 200 250 300 Switch Current (mA) Duty Cycle (%) Figure 16. Switch Current Limit vs. Duty Cycle Figure 17. Switch Saturation Voltage vs. Switch Current 250 Feedback Voltage VFB (mV) 200 150 100 50 0 0.0 0.5 1.0 1.5 2.0 2.5 CTRL Voltage (V) Figure 18. Feedback Voltage vs. CTRL Pin Voltage Aug. 2008 Rev. 1. 1 9 BCD Semiconductor Manufacturing Limited Preliminary Datasheet WHITE LED STEP-UP CONVERTER Typical Application VIN 3V L AP3030 22 Control Signal CIN VIN CTRL SW VOUT COUT AP3030 GND FB 0.22F 10 1F C: X5R or X7R Dielectric L: SUMIDA CDRH5D28R-220NC or Equivalent This circuit can work in full temperature Figure 19. Typical Application of Eight LED Drivers VIN 3V L 22 Control Signal CIN VIN CTRL SW VOUT COUT AP3030 GND FB 0.22F 1F 10 10 C: X5R or X7R Dielectric L: SUMIDA CDRH5D28R-220NC or Equivalent Two transistors are recommended to use Dual Matched transistor pairs This circuit can work in full temperature Figure 20. Typical Application of Ten LED Drivers Aug. 2008 Rev. 1. 1 10 BCD Semiconductor Manufacturing Limited Preliminary Datasheet WHITE LED STEP-UP CONVERTER Mechanical Dimensions SOT-23-6 Unit: mm(inch) AP3030 2.820(0.111) 3.020(0.119) 0.300(0.012) 0.400(0.016) 0.300(0.012) 0.600(0.024) 0 8 0.200(0.008) 6 2.650(0.104) 2.950(0.116) 5 4 Pin 1 Dot by Marking 1 2 3 0.700(0.028)REF 0.950(0.037)TYP 1.800(0.071) 2.000(0.079) 0.000(0.000) 0.100(0.004) 0.100(0.004) 0.200(0.008) 1.050(0.041) 1.050(0.041) 1.150(0.045) 1.250(0.049) Aug. 2008 Rev. 1. 1 11 1.500(0.059) 1.700(0.067) BCD Semiconductor Manufacturing Limited Preliminary Datasheet WHITE LED STEP-UP CONVERTER Mechanical Dimensions TSOT-23-6 Unit: mm(inch) AP3030 2.800(0.110) 3.000(0.118) R0.100(0.004) MIN 0 8 1.500(0.059) 1.700(0.067) Pin 1 Dot by Marking 2.600(0.102) 3.000(0.118) 0.370(0.015) MIN 0.950(0.037) BSC 1.900(0.075) BSC GAUGE PLANE 0.100(0.004) 0.250(0.010) 0.250(0.010) BSC 0.700(0.028) 0.800(0.031) 0.700(0.030) 0.900(0.035) 0.000(0.000) 0.100(0.004) 0.350(0.014) 0.510(0.020) Aug. 2008 Rev. 1. 1 12 BCD Semiconductor Manufacturing Limited BCD Semiconductor Manufacturing Limited 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 - Headquarters BCD Semiconductor Manufacturing Limited BCD Semiconductor Manufacturing Limited - Wafer Fab No. 1600, Zi Xing Road, Shanghai ZiZhu Science-based Industrial Park, 200241, China Shanghai SIM-BCD Semiconductor Manufacturing Limited Tel: +86-21-24162266, Fax: +86-21-24162277 800, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6485 1491, Fax: +86-21-5450 0008 REGIONAL SALES OFFICE Shenzhen Office REGIONAL SALES OFFICE - Wafer Fab BCD Semiconductor Manufacturing Limited Shanghai Design Group - IC SIM-BCD Semiconductor Manufacturing Co., Ltd. 800 Yi Shan Road, Shanghai 200233, China Corporation Advanced Analog Circuits (Shanghai) Tel: +86-21-6485 900, Yi Shan Road, Shanghai 200233, China 8F, Zone B, 1491, Fax: +86-21-5450 0008 Tel: +86-21-6495 9539, Fax: +86-21-6485 9673 USA Office BCD Semiconductor Corp. USA Office 30920 Huntwood Ave. Hayward, BCD Semiconductor Corporation CA 94544, USA 30920 Huntwood Ave. Hayward, Tel 94544, U.S.A CA : +1-510-324-2988 Fax: +1-510-324-2788 Tel : +1-510-324-2988 Fax: +1-510-324-2788 Taiwan Office Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd., Shenzhen Office BCD Taiwan Office (Taiwan) Company Limited Semiconductor Shenzhen Office Room E, SIM-BCD Semiconductor 3rd Fuzhong Road, Futian District, Shenzhen, 4F, 298-1, Rui Guang Road,(Taiwan) Company Limited Shanghai 5F, Noble Center, No.1006,Manufacturing Co., Ltd. Shenzhen Office BCD Semiconductor Nei-Hu District, Taipei, 518026, China Taiwan 298-1, Rui Guang Road, Nei-Hu District, Taipei, Advanced Analog Circuits (Shanghai) Corporation Shenzhen Office 4F, Tel: +86-755-8826 Center, Tel: Taiwan Room E, 5F, Noble 7951 No.1006, 3rd Fuzhong Road, Futian District, Shenzhen 518026, China +886-2-2656 2808 Fax:+86-755-8826 7951 +86-755-8826 7865 Fax: +886-2-2656 28062808 Tel: Tel: +886-2-2656 Fax: +86-755-8826 7865 Fax: +886-2-2656 2806 |
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