AP3008_06 BCDSEMI | Alldatasheet

Document overview

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Technical content

Features

  • Inherently Uniform LED Current
  • High Efficiency up to 84%
  • Drives 2 to 3 LEDs from a 2.7V Supply
  • 1.2MHz PWM Operation Frequency
  • Requires Only 0.22µF Output Capacitor
  • Shutdown Current: < 1µA
  • Built-in Output Over-V oltage Protection
  • Under V oltage Lock Out (UVLO)

Applications

  • Digital Cameras
  • LCD modules
  • GPS Receivers
  • Cellular Phones
  • PDAs, Handheld Computers

Figure 1. Package Type of AP3008

Figure 2. Pin Configuration of AP3008 (Top View) send a low to high sequence on shutdown pin or switch off the VIN supply. 3 FB V oltage Feedback. Re ference voltage is 95mV .

4 SHDN

Connect to 0.4V or less to disable device. 5V IN Input Supply Pin. Must be locally bypassed.

Jul. 2006 Rev. 1. 3 BCD Semiconductor Manufacturing Limited Functional Block Diagram Figure 3. Functional Block Diagram of AP3008 BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.

Ordering Information

Jul. 2006 Rev. 1. 3 BCD Semiconductor Manufacturing Limited Parameter Symbol Value Unit Input V oltage V IN 15 V SW V oltage 36 V FB V oltage 10 V SHDN V oltage 15 V Thermal Resistance (Junction to Atmosphere, no Heat sink) R θJA 265 oC/W Operating Junction Temperature 150 oC Storage Temperature Range T STG -65 to 150 oC Lead Temperature (Soldering, 10sec) T LEAD 260 oC ESD (Machine Model) 250 V ESD (Human Body Model) 2000 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 indi- cated under "Recommended Operating Condi tions" is not implied. Exposure to "A bsolute Maximum Ratings" for extended periods may affect device reliability. Parameter Symbol Min Max Unit Operating Temperature Range T OP -40 85 oC Operating V oltage Range 2.5 12 V Recommended Operating Conditions Absolute Maximum Ratings (Note 1)

Jul. 2006 Rev. 1. 3 BCD Semiconductor Manufacturing Limited (VIN=3V , VSHDN=3V, TA=25oC, unless otherwise specified.) Parameter Symbol Conditions Min Typ Max Unit Feedback V oltage V FB ISW=100mA, Duty Cycle=66% 86 95 104 mV FB Pin Bias Current 45 100 nA Supply Current I CC VSHDN=VIN, VFB=VIN, No switching 1.9 2.5 mA Supply Current I Q VSHDN=0V 0.1 1.0 µA Switch Frequency f 0.8 1.2 1.6 MHz Maximum Duty Cycle D MAX 85 90 % Switch Current Limit I LIM Duty=15% 320 mA Switch VCESA T V CESAT ISW=250mA 350 mV Switch Leakage Current V SW=5V 0.01 5 µA SHDN Vo l t a g e VTH High 1.5 VVTL Low 0.4 SHDN Pin Bias Current 50 µA OVP V oltage V OVP 29 V

Electrical Characteristics

Figure 8. Efficiency vs. Junction Temperature Figure 9. Switch Current vs. Duty Cycle Figure 10. Efficiency vs. LED Current Figure 11. Efficiency vs. LED Current

3 LEDs

4 LEDs

Figure 12. Three White LEDs Driver

Jul. 2006 Rev. 1. 3 BCD Semiconductor Manufacturing Limited SOT-23-5L Unit: mm(inch) Mechanical Dimensions 2.820(0.111) 2.650(0.104) 1.500(0.059) 0.000(0.000) 1.050(0.041) 0.300(0.012) 0.950(0.037) 1.050(0.041) 0.100(0.004) 0.200(0.008) 0.300(0.012) 3.020(0.119) 1.700(0.067) 2.950(0.116) 0.400(0.016) 1.250(0.049) 0.100(0.004) 1.150(0.045) 0.200(0.008) 0.600(0.024) 1.800(0.071) 2.000(0.079) 0.700(0.028) REF TYP

BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifi- cations 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. - 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 BCD Semiconductor Manufacturing Limited MAIN SITE REGIONAL SALES OFFICE Shenzhen Office Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd. Shenzhen Office Advanced Analog Circuits (Shanghai) Corporation Shenzhen Office 27B, Tower C, 2070, Middle Shen Nan Road, Shenzhen 518031, China Tel: +86-755-8368 3987, Fax: +86-755-8368 3166 Taiwan Office BCD Semiconductor (Taiwan) Company Limited 4F, 298-1, Rui Guang Road, Nei-Hu District, Taipei, Taiwan Tel: +886-2-2656 2808, Fax: +886-2-2656 2806 USA Office BCD Semiconductor Corporation 3170 De La Cruz Blvd., Suite 105, Santa Clara, CA 95054-2411, U.S.A Tel: +1-408-988 6388, Fax: +1-408-988 6386 - 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 BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com