Product Brief WHITE LED DRIVER Description The AP3008 is a 1.2MHz PWM boost switching regulator designed for constant-current white LED driver applications. The AP3008 can drive a string of 2 to 3 white LEDs from a 2.7V supply in series, ensuring uniform brightness and eliminating several ballast resistors. The AP3008 implements a constant frequency 1.2MHz PWM control scheme. The high frequency PWM operation also saves board space by reducing external component sizes. To improve efficiency, the feedback voltage is set to 95 mV, which reduces the power dissipation in the current setting resistor. The AP3008 is equipped with OVP protection ability, the SW pin monitors the output voltage and will turn off the device if an overvoltage condition is present to prevent damage from an open circuit condition. AP3008 Parametric Table Feedback Voltage (Typ) (mV) 95 Supply Current (Typ) (mA) 1.9 Switch Frequency (Typ) (MHz) 1.2 Switch Current Limit (Typ) (mA) 320 Switch VCESAT (Typ) (mV) 350 OVP Voltage (Typ) (V) 29 Package SOT-23-5L Benefits · · Built-in Output Overvoltage Protection Very Competitive Price 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 Overvoltage Protection Under Voltage Lock Out (UVLO) Additional Available Materials · · · · · Samples Preliminary Datasheet Demo Board Application Note ESD Report Applications · · · · · Digital Cameras LCD modules GPS Receivers Cellular Phones PDAs, Handheld Computers Jul. 2006 BCD Semiconductor Manufacturing Limited Product Brief WHITE LED DRIVER AP3008 Pin Configuration K Package (SOT-23-5L) SW 1 GND 2 FB 3 5 VIN 4 SHDN Ordering Information Example Part Number Marking ID Package Temperature Range Tin Lead Lead Free Tin Lead Lead Free Packing Type SOT-23-5L -40 to 85oC AP3008KTR AP3008KTR-E1 K1B E1B Tape & Reel Detailed information please refer to the relevant datasheet. Sales Office: USA 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 Shanghai 8F, B Zone, 900 Yi Shan Road, Shanghai 200233, China Tel : 86-21-6495 9539 Fax : 86-21-6485 9673 Taiwan 4F, 298-1 Rui Guang Road, Nei-Hu District, Taipei, Taiwan Tel : 886-2-2656-2808 Fax : 886-2-2656-2806 Shenzhen Room 27B, Tower C, No. 2070, Shennanzhong Road, Shenzhen 518031, China Tel : 86-755-8368 3987 Fax : 86-755-8368 3166 Jul. 2006 BCD Semiconductor Manufacturing Limited