Preliminary Datasheet WHITE LED STEP-UP CONVERTER AP3030 General Description Features 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 0.22µF 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. · · · 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 0.22µF Output Capacitor Applications 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. Cellular Phones Digital Cameras LCD modules GPS Receivers PDAs, Handheld Computers TSOT-23-6 SOT-23-6 Figure 1. Package Types of AP3030 Aug. 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 1 Preliminary Datasheet WHITE LED STEP-UP CONVERTER AP3030 Pin Configuration K/KT Package (SOT-23-6/TSOT-23-6) Pin 1 Dot by Marking SW 1 6 VIN GND 2 5 VOUT FB 3 4 CTRL Figure 2. Pin Configuration of AP3030 (Top View) Pin Description Pin Number Pin Name Function 1 SW 2 GND 3 FB 4 CTRL 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 5 VOUT Output Pin. Connected to the cathode of internal schottky diode 6 VIN Switch Pin. Connect external inductor Ground Voltage Feedback. Reference voltage is 200mV Input Supply Pin. Must be locally bypassed Aug. 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 2 Preliminary Datasheet WHITE LED STEP-UP CONVERTER AP3030 Functional Block Diagram FB SW 3 1 5 SOFT START VIN 6 VREF 1.25 V 200 mV OVP DRIVER A1 Q R A2 VOUT Q1 S COMPARATOR Σ CTRL 2 4 GND RAMP GENERATOR 1.2 MHz OSCILLATOR Figure 3. Functional Block Diagram of AP3030 Ordering Information AP3030 - Circuit Type E1: Lead Free G1: Green Package TR: Tape and Reel K: SOT-23-6 KT: TSOT-23-6 Package Temperature Range SOT-23-6 -40 to 85oC TSOT-23-6 o -40 to 85 C Part Number Lead Free Marking ID Green Lead Free Green Packing Type AP3030KTR-E1 AP3030KTR-G1 EEB GEB Tape & Reel AP3030KTTR-E1 AP3030KTTR-G1 S9G L9G Tape & Reel 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 BCD Semiconductor Manufacturing Limited 3 Preliminary Datasheet WHITE LED STEP-UP CONVERTER AP3030 Absolute Maximum Ratings (Note 1) Parameter Symbol Value Unit Input Voltage VIN 20 V SW Voltage VSW 30 V FB Voltage VFB 20 V VCTRL 20 V RθJA 265 oC/W TJ 150 o C TSTG -65 to 150 o C TLEAD 260 o C ESD (Machine Model) 250 V ESD (Human Body Model) 2000 V CTRL Voltage Thermal Resistance (Junction to Atmosphere, No Heat Sink) 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 Operating Temperature Range TOP -40 85 o Input Voltage VIN 2.5 16 V CTRL Voltage VCTRL 16 V Aug. 2008 Rev. 1. 1 Unit C BCD Semiconductor Manufacturing Limited 4 Preliminary Datasheet WHITE LED STEP-UP CONVERTER AP3030 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 Feedback Voltage VFB FB Pin Bias Current IFB Quiescent Current IQ 16 IOUT=20mA, 4 LEDs, TA=-40oC to 85oC 188 200 212 mV 35 100 nA VFB=VIN, no switching 1.5 2.5 3.2 mA VCTRL=0V 2.0 3.2 5.0 µA f 0.9 1.2 1.5 MHz Maximum Duty Cycle DMAX 90 93 Switch Current Limit (Note 2) ILIMIT Shutdown Quiescent Current Switch Frequency Switch VCE Saturation Voltage ISHDN VCESAT Switch Leakage Current CTRL Pin Voltage VCTRL D=40% 550 D=80% 550 ISW=250mA 360 VSW=5V 0.01 High Schottky Forward Drop VDROP Schottky Leakage Current 5 µA V 55 TA=85oC 50 TA=-40oC 75 ID=150mA 0.7 VR=23V 0.1 VR=27V Soft Start Time mV 0.05 40 ICTRL mA 1.8 Low CTRL Pin Bias Current % 72 µA V 4 µA 150 t 300 µS Note 2: The switch current limit is related to duty cycle. Please refer to Figure 16 for detail. Aug. 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 5 Preliminary Datasheet WHITE LED STEP-UP CONVERTER AP3030 Typical Performance Characteristics (VF(forward voltage) of WLED is 3.45V @ IF=20mA, unless otherwise noted ) 83 86 82 84 81 82 Efficiency (%) Efficiency (%) 80 79 78 77 80 78 76 76 CIN=1µF, COUT=0.22µF, L=22µH -25 0 25 50 75 CIN=1µF, COUT=0.22µF, L=22µH 72 74 73 -50 O IOUT=20mA, 8LEDs,TA=25 C 74 VIN=3.6V, IOUT=20mA, 8LEDs 75 70 3.0 100 3.5 o Junction Temperature ( C) 4.0 4.5 5.0 Input Voltage (V) Figure 4. Efficiency vs. Junction Temperature Figure 5. Efficiency vs. Input Voltage 350 86 85 Schottky Forward Current (mA) 300 84 Efficiency (%) 83 82 81 80 79 O VIN=3.6V, IOUT=20mA,TA=25 C 78 CIN=1µF, COUT=0.22µF, L=22µH 250 200 150 100 50 77 0 76 2 3 4 5 6 7 0 8 200 400 600 800 1000 Schottky Forward Drop (mV) LED's Number Figure 6. Efficiency vs. LED's Number Figure 7. Schottky Forward Current vs. Schottky Forward Drop Aug. 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 6 Preliminary Datasheet WHITE LED STEP-UP CONVERTER AP3030 Typical Performance Characteristics (Continued) (VF(forward voltage) of WLED is 3.45V @ IF=20mA, unless otherwise noted ) 3.0 2.5 25 Quiescent Current (mA) Shutdown Quiescent Current (µA) 30 20 15 10 5 2.0 1.5 1.0 O -50 C O 25 C O 100 C 0.5 0 2 4 6 8 10 12 14 0.0 16 0 2 4 Input Voltage (V) 6 8 10 12 14 16 Input Voltage (V) Figure 8. Shutdown Quiescent Current vs. Input Voltage Figure 9. Quiescent Current vs. Input Voltage 36 6.0 5.5 5.0 Input Current (mA) Output Clamp Voltage (V) 34 32 30 4.5 4.0 3.5 3.0 28 2.5 2.0 2.5 26 2 4 6 8 10 12 14 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 Aug. 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 7 Preliminary Datasheet WHITE LED STEP-UP CONVERTER AP3030 Typical Performance Characteristics (Continued) (VF(forward voltage) of WLED is 3.45V @ IF=20mA, unless otherwise noted ) 210 1.35 208 1.30 206 Feedback Voltage (mV) 1.40 Frequency (MHz) 1.25 1.20 1.15 1.10 1.05 204 202 200 198 196 1.00 194 0.95 192 0.90 -50 -25 0 25 50 75 190 -50 100 -25 0 25 50 75 100 o o Junction Temperature ( C) Junction Temperature ( C) Figure 12. Switch Frequency vs. Junction Temperature Figure 13. Feedback Voltage vs. Junction Temperature 0.50 0.78 0.45 VR=10V 0.40 VR=16V 0.35 VR=23V Schottky Leakage Current (µA) 0.80 Schottky Forward Drop (V) 0.76 0.74 0.72 0.70 0.68 0.66 0.64 0.25 0.20 0.15 0.10 0.05 0.62 0.60 -50 0.30 -25 0 25 50 75 0.00 -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 Leakage Current vs. Junction Temperature Aug. 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 8 Preliminary Datasheet WHITE LED STEP-UP CONVERTER AP3030 Typical Performance Characteristics (Continued) (VF(forward voltage) of WLED is 3.45V @ IF=20mA, unless otherwise noted ) 700 450 400 Saturation Voltage (mV) Current Limit (mA) 600 500 400 300 O -50 C O 25 C O 100 C 200 100 30 40 50 60 70 80 350 300 250 200 150 100 50 50 90 100 150 200 250 300 Switch Current (mA) Duty Cycle (%) Figure 17. Switch Saturation Voltage Figure 16. Switch Current Limit vs. Duty Cycle vs. Switch Current Feedback Voltage VFB (mV) 250 200 150 100 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 BCD Semiconductor Manufacturing Limited 9 Preliminary Datasheet WHITE LED STEP-UP CONVERTER AP3030 Typical Application VIN ≥ 3V L 22µΗ SW VIN Control Signal VOUT COUT AP3030 CTRL GND CIN 0.22µF FB 10Ω 1µF 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 22µΗ VIN Control Signal SW VOUT COUT AP3030 CTRL CIN 0.22µF FB GND 10Ω 1µF 10Ω 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 BCD Semiconductor Manufacturing Limited 10 Preliminary Datasheet WHITE LED STEP-UP CONVERTER AP3030 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) Aug. 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 11 Preliminary Datasheet WHITE LED STEP-UP CONVERTER AP3030 Mechanical Dimensions TSOT-23-6 2.800(0.110) 3.000(0.118) 1.500(0.059) 1.700(0.067) Unit: mm(inch) R0.100(0.004) MIN 0° 8° 2.600(0.102) 3.000(0.118) Pin 1 Dot by Marking 0.370(0.015) MIN 0.950(0.037) BSC 0.100(0.004) 0.250(0.010) 1.900(0.075) BSC 0.250(0.010) BSC GAUGE PLANE 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 BCD Semiconductor Manufacturing Limited 12 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. 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