4 3 2 2 1 * 700mA 300ms FLASH 1 2 5 C1 10uF,10V 0805 D1 PMEG2010EA PHILIPS LED1 + * D 1 2 3 C5 0.1uF,6.3V C4 0.1uF,6.3V BT1 PC MOUNT KEYSTONE 2464 OPT R5 10k C6 2.2uF,6.3V 0603 R1 1k 1 2 3 4 1 5 3 6 7 4 R2 1k RT NOTES: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS ARE IN OHMS, 0402. ALL CAPACITORS ARE 0402. 2 VREF 8 SHDN 6 5 2 1 0.01uF 3 2200pF R12 1k 10k VISHAY R4 0.150 1% 0805 R8 107k 1% R9 2.49k 1% C R10 10k 1% RA5 VSS 14 RA0 13 RA4 RA1 MCLR# RA2 RC5 RC0 RC4 RC1 RC3 RC2 VDD PIC16F630I/ST SW3 12 11 10 1 BOURNS-7914J 2 ON/OFF 9 8 EN2 B EN1 R6 10k 5% R7 10k 5% 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 CIRUIT 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. 4 Q2 Si1406DH 3 CUSTOMER NOTICE 5 R11 7 15k FBN 10 FBP 9 VIN U2 LED2 LTST-C155KGJRKT 2 A 6 VS SW1 BOURNS-7914J 1 2 Flash SW2 BOURNS-7914J 1 2 Torch B 5 C2 R3 C3 4 E2 GND + VIN SS 12 VC 11 L Q1 Si1406DH 1 2 5 6 C VIN SW 15 E1 VIN 2.7V-4.5V 4 GND 14 GND 13 SW 4 1 SUMIDA CDRH5D28-3R0 GND 1 U1 LT3479EDE L1 3.0uH 2 3 3 4 4 6 6 JP1 HD2X3-079 OPT D2 CMOZ10L 2 5 5 1 1 D AOT 3218 HPW 1502B 150mA/700mA AOT 3 APPROVALS DRAWN: CHECKED: APPROVED: ENGINEER: KEITH S. DESIGNER: TECHNOLOGY KIM T. TITLE: 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LTC Confidential-For Customer Use Only SCHEMATIC A HIGH CURRENT BOOST LED DRIVER SIZE DWG NO. A DATE: DC843A-2 * LT3479EDE Wednesday, February 09, 2005 2 SHEET 1 1 REV A OF 1