AP3030

Data Sheet 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 0.22µF 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. 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. 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) Fixed 1.2MHz Switching Frequency Uses Tiny 1mm Tall Inductor Requires Only 0.22µF 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 Oct. 2009 Rev. 1. 6 1 BCD Semiconductor Manufacturing Limited Data Sheet 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 Oct. 2009 Rev. 1. 6 2 BCD Semiconductor Manufacturing Limited Data Sheet WHITE LED STEP-UP CONVERTER Functional Block Diagram FB 3 SOFT START AP3030 SW 1 5 OVP Q1 VOUT VIN 6 VREF 1.25 V 200 mV A1 A2 COMPARATOR DRIVER R S Q Σ 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: RoHS TR: Tape and Reel Package SOT-23-6 TSOT-23-6 Temperature Range -40 to 85 C -40 to 85oC o Part Number AP3030KTR-E1 AP3030KTTR-E1 EEB S9G Marking ID Packing Type Tape & Reel Tape & Reel BCD Semiconductor's products as designated with "E1" suffix in the part number are RoHS compliant. Oct. 2009 Rev. 1. 6 3 BCD Semiconductor Manufacturing Limited Data Sheet 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 RθJA TJ TSTG TLEAD Value 20 38 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 Oct. 2009 Rev. 1. 6 4 BCD Semiconductor Manufacturing Limited Data Sheet 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 OVP Voltage Schottky Forward Drop Schottky Leakage Current Soft Start Time Thermal Resistance (Junction to Case) t θJC SOT-23-6 TSOT-23-6 VOV VDROP ID=150mA VR=23V VR=27V 300 60 60 55 50 75 30 0.7 0.1 4 150 µS oC/W AP3030 Conditions Min 2.5 Typ Max Unit V 16 IOUT=20mA, 4 LEDs, TA=-40oC to 85oC 188 200 35 VFB=VIN, no switching VCTRL=0V 1.5 2.0 0.9 90 2.5 3.2 1.2 93 550 550 360 0.01 1.8 0.05 72 µA 5 mV µA V 212 100 3.2 5.0 1.5 mV nA mA µA MHz % mA V V µA Note 2: The switch current limit is related to duty cycle. Please refer to Figure 15 for detail. Oct. 2009 Rev. 1. 6 5 BCD Semiconductor Manufacturing Limited Data Sheet 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 80 86 84 82 Efficiency (%) 79 78 77 76 75 74 73 -50 -25 0 Efficiency (%) 80 78 76 74 72 70 3.0 VIN=3.6V, IOUT=20mA, 8LEDs CIN=1µF, COUT=0.22µF, L=22µH IOUT=20mA, 8LEDs,TA=25 C CIN=1µF, COUT=0.22µF, L=22µH O 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 86 85 84 83 350 300 Schottky Forward Current (mA) 250 Efficiency (%) 82 81 80 79 78 77 76 2 3 4 5 6 7 8 200 150 VIN=3.6V, IOUT=20mA,TA=25 C CIN=1µF, COUT=0.22µF, L=22µH O 100 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 Oct. 2009 Rev. 1. 6 6 BCD Semiconductor Manufacturing Limited Data Sheet 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 (µA) 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 6.0 5.5 5.0 1.40 1.35 1.30 Input Current (mA) 1.25 4.5 4.0 3.5 3.0 2.5 2.0 2.5 Frequency (MHz) 3.0 3.5 4.0 4.5 5.0 1.20 1.15 1.10 1.05 1.00 0.95 0.90 -50 Input Voltage (V) -25 0 25 50 o 75 100 Junction Temperature ( C) Figure 10. Input Current in Output Open Circuit vs. Input Voltage Figure 11. Switch Frequency vs. Junction Temperature Oct. 2009 Rev. 1. 6 7 BCD Semiconductor Manufacturing Limited Data Sheet WHITE LED STEP-UP CONVERTER Typical Performance Characteristics (Continued) (VF(forward voltage) of WLED is 3.45V @ IF=20mA, unless otherwise noted ) AP3030 210 208 206 204 202 200 198 196 194 192 190 -50 -25 0 25 50 o 0.80 0.78 0.76 Schottky Forward Drop (V) 75 100 Feedback Voltage (mV) 0.74 0.72 0.70 0.68 0.66 0.64 0.62 0.60 -50 -25 0 25 50 o 75 100 Junction Temperature ( C) Junction Temperature ( C) Figure 12. Feedback Voltage vs. Junction Temperature Figure 13. Schottky Forward Drop vs. Junction Temperature 0.50 0.45 700 Schottky Leakage Current (µA) VR=10V VR=16V VR=23V Current Limit (mA) 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0.00 -50 -25 0 25 50 o 600 500 400 300 200 -50 C O 25 C O 100 C 40 50 60 70 80 90 O 75 100 100 30 Junction Temperature ( C) Duty Cycle (%) Figure 14. Schottky Leakage Current vs. Junction Temperature Figure 15. Switch Current Limit vs. Duty Cycle Oct. 2009 Rev. 1. 6 8 BCD Semiconductor Manufacturing Limited Data Sheet WHITE LED STEP-UP CONVERTER Typical Performance Characteristics (Continued) (VF(forward voltage) of WLED is 3.45V @ IF=20mA, unless otherwise noted ) AP3030 450 400 350 300 250 200 150 100 50 50 250 Feedback Voltage VFB (mV) 100 150 200 250 300 200 Saturation Voltage (mV) 150 100 50 0 0.0 0.5 1.0 1.5 2.0 2.5 Switch Current (mA) CTRL Voltage (V) Figure 16. Switch Saturation Voltage vs. Switch Current Figure 17. Feedback Voltage vs. CTRL Pin Voltage Oct. 2009 Rev. 1. 6 9 BCD Semiconductor Manufacturing Limited Data Sheet WHITE LED STEP-UP CONVERTER Typical Application VIN ≥ 3V L AP3030 22µΗ Control Signal CIN VIN CTRL SW VOUT COUT AP3030 GND FB 0.22µF 10Ω 1µF C: X5R or X7R Dielectric L: SUMIDA CDRH5D28R-220NC or Equivalent This circuit can work in full temperature Figure 18. Typical Application of Eight LED Drivers VIN ≥ 3V L 22µΗ Control Signal CIN VIN CTRL SW VOUT AP3030 GND FB COUT 0.22µF 10Ω 10Ω 1µF 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 19. Typical Application of Ten LED Drivers Oct. 2009 Rev. 1. 6 10 BCD Semiconductor Manufacturing Limited Data Sheet 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° 8° 0.200(0.008) 6 2.650(0.104) 2.950(0.116) 5 4 0.300(0.012) 0.600(0.024) 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) 1.500(0.059) 1.700(0.067) 0.000(0.000) 0.100(0.004) 0.100(0.004) 0.200(0.008) 0.900(0.035) 1.450(0.057) MAX 1.300(0.051) Oct. 2009 Rev. 1. 6 11 BCD Semiconductor Manufacturing Limited Data Sheet WHITE LED STEP-UP CONVERTER Mechanical Dimensions (Continued) 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) 0.900(0.035) 1.000(0.039) MAX 0.000(0.000) 0.100(0.004) 0.350(0.014) 0.510(0.020) Oct. 2009 Rev. 1. 6 12 BCD Semiconductor Manufacturing Limited BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com IMPORTANT NOTICE IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifiBCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifications herein. 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