5 4 VIN 3V-5V E1 GND 3 2 1 VIN C2 1uF 6.3V C6 (OPT) E2 D C3 0.22uF 25V LED6 1 C4 0.1uF C5 0.1uF R5 100K E7 CTRL1 3 OFF B E8 CTRL2 Q1 SI2302ADS 2 1 CUSTOMER NOTICE CONTRACT NO. LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. A 5 VIN ON 2 R4 100K JP2 VOUT2 3 ON 2 OFF C 6 1 3 JP1 LED DRIVER B R2 100k GND FB2 CTRL2 5 GND2 4 3 GND1 CTRL1 2 13 GND VIN E6 VOUT2 16V@24mA R3 2.21M LED4 LED5 E9 E3 LED2 LED3 PWM C7 2.2uF 25V VOUT2 7 SW2 9 U1 LT3498EDDB LED1 E5 10uH CAP2 8 LED1 GND L2 VIN 10 E4 C 15uH Copper Copper SD3112-150 SD3112-100 1 LED L1 R1 10 SW1 11 C1 0.47uF 50V CAP1 12 D 4 3 APPROVALS DRAWN DATE HELEN 4/03/07 Walker Bai 4/04/07 CHECKED TECHNOLOGY TITLE APPROVED ENGINEER DESIGNER Tuesday, June 26, 2007 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 A LT3498EDDB, 20mA Six White LED Driver and OLED Driver with Integrated Schottky SIZE CAGE CODE FILENAME: SCALE: 2 DWG NO REV A DC1137A SHEET 1 1 OF 1