AP3008 1.2MHz boost switching regulator designed constant-current whit
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Preliminary Datasheet WHITE DRIVER General Description
AP3008 1.2MHz boost switching regulator designed constant-current white driver applications. AP3008 drive string white LEDs from 2.7V supply series, ensuring uniform brightness eliminating several ballast resistors. AP3008 implements constant frequency 1.2MHz control scheme. high frequency operation also saves board space reducing external component sizes. improve efficiency, feedback voltage which reduces power dissipation current setting resistor. AP3008 equipped with protection ability, monitors output voltage will turn device over-voltage condition present prevent damage from open circuit condition. AP3008 available SOT-23-5L package.
AP3008 Features
Inherently Uniform Current High Efficiency Drives LEDs from 2.7V Supply 1.2MHz Operation Frequency Requires Only 0.22µF Output Capacitor Shutdown Current: Built-in Output Over-Voltage Protection Under Voltage Lock (UVLO)
Applications
Digital Cameras modules Receivers Cellular Phones PDAs, Handheld Computers
SOT-23-5L
Figure Package Type AP3008
Jul. 2006 Rev.
Semiconductor Manufacturing Limited
Preliminary Datasheet WHITE DRIVER Configuration
Package (SOT-23-5L)
AP3008
SHDN
Figure Configuration AP3008 (Top View)
Description
Number Name Function Switch Pin. Connect inductor/diode here. output voltage range extend this limit. voltage this higher than overvoltage protection threshold (OVP), device comes back shutdown mode. restart chip, must then send high sequence shutdown switch supply. Ground Pin. Voltage Feedback. Reference voltage 95mV. Shutdown Pin. Connect 1.5V higher enable device; Connect 0.4V less disable device. Input Supply Pin. Must locally bypassed.
SHDN
Jul. 2006 Rev.
Semiconductor Manufacturing Limited
Preliminary Datasheet WHITE DRIVER Functional Block Diagram AP3008
DRIVER
VREF 1.25V
95mV
COMPARATOR
SHDN
SHUTDOWN
RAMP GENERATOR
1.2MHz OSCILLATOR
Figure Functional Block Diagram AP3008
Ordering Information
AP3008 Circuit Type Package SOT-23-5L Lead Free Blank: Lead Tape Reel Blank: Tube
Package
SOT-23-5L
Temperature Range
85oC
Part Number Lead
AP3008KTR
Marking Lead
Lead Free
AP3008KTR-E1
Lead Free
Packing Type
Tape Reel
Semiconductor's Pb-free products, designated with "E1" suffix part number, RoHS compliant.
Jul. 2006 Rev.
Semiconductor Manufacturing Limited
Preliminary Datasheet WHITE DRIVER Absolute Maximum Ratings (Note
Parameter Input Voltage Voltage Voltage SHDN Voltage Thermal Resistance (Junction Atmosphere, Heat sink) Operating Junction Temperature Storage Temperature Range Lead Temperature (Soldering, 10sec) (Machine Model) (Human Body Model) TSTG TLEAD Symbol Value 2000 Unit
oC/W
AP3008
Note Stresses greater than those listed under "Absolute Maximum Ratings" cause permanent damage device. These stress ratings only, functional operation device these other conditions beyond those indicated under "Recommended Operating Conditions" implied. Exposure "Absolute Maximum Ratings" extended periods affect device reliability.
Recommended Operating Conditions
Parameter Operating Temperature Range Operating Voltage Range Symbol Unit
Jul. 2006 Rev.
Semiconductor Manufacturing Limited
Preliminary Datasheet WHITE DRIVER Electrical Characteristics
(VIN=3V, VSHDN=3V, TA=25oC, unless otherwise specified.)
Parameter Feedback Voltage Bias Current Supply Current Supply Current Switch Frequency Maximum Duty Cycle Switch Current Limit Switch VCESAT Switch Leakage Current SHDN Voltage SHDN Bias Current Voltage VOVP DMAX ILIM VCESAT Duty=15% ISW=250mA VSW=5V High VSHDN=VIN, VFB=VIN, switching VSHDN=0V Symbol Conditions ISW=100mA, Duty Cycle=66% 0.01 Unit
AP3008
Jul. 2006 Rev.
Semiconductor Manufacturing Limited
Preliminary Datasheet WHITE DRIVER Typical Performance Characteristics AP3008
(mA)
SHDN Bias Current (µA)
VSHDN=10V VSHDN=3.6V VSHDN=3V VSHDN=2.7V
Junction Temperature
Figure Quiescent Current
Figure SHDN Bias Current Junction Temperature
Feedback Bias Current (nA)
Switch Frequency (MHz)
Junction Temperature
Junction Temperature
Figure Switch Frequency Junction Temperature
Figure Feedback Bias Current Junction Temperature
Jul. 2006 Rev.
Semiconductor Manufacturing Limited
Preliminary Datasheet WHITE DRIVER Typical Performance Characteristics (Continued) AP3008
ILED=20mA
Current Limit (mA)
Efficiency
ILED=15mA
ILED=10mA VIN=3.6V LEDs
Junction Temperature
Duty Cycle
Figure Efficiency Junction Temperature
Figure Switch Current Duty Cycle
LEDs VLED=3.35V, TA=25
LEDs VLED=3.35V, TA=25
Efficiency
Efficiency
VIN=3V VIN=3.6V
VIN=3V VIN=3.6V
Current (mA)
Current (mA)
Figure Efficiency Current
Figure Efficiency Current
Jul. 2006 Rev.
Semiconductor Manufacturing Limited
Preliminary Datasheet WHITE DRIVER Typical Application AP3008
SHDN 6.34 0.22µF
AP3008
Dielectric SUMIDA CDRH5D28R-220NC Equivalent
Figure Three White LEDs Driver
Jul. 2006 Rev.
Semiconductor Manufacturing Limited
Preliminary Datasheet WHITE DRIVER Mechanical Dimensions SOT-23-5L Unit: mm(inch) AP3008
2.820(0.111) 3.020(0.119)
0.100(0.004) 0.200(0.008)
2.650(0.104)
2.950(0.116)
1.500(0.059) 1.700(0.067)
0.200(0.008)
0.700(0.028)
0.950(0.037)
0.300(0.012) 0.400(0.016) 1.800(0.071) 2.000(0.079)
0.300(0.012) 0.600(0.024)
1.050(0.041)
1.250(0.049)
0.000(0.000) 0.100(0.004)
1.050(0.041) 1.150(0.045)
Jul. 2006 Rev.
Semiconductor Manufacturing Limited
http://www.bcdsemi.com
IMPORTANT NOTICE Semiconductor Manufacturing Limited reserves right make changes without further notice products specifications herein. Semiconductor Manufacturing Limited does assume responsibility products particular purpose, does Semiconductor Manufacturing Limited assume liability arising application products circuits. Semiconductor Manufacturing Limited does convey license under patent rights other rights rights others.
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REGIONAL SALES OFFICE
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