5 4 3 2 1 REVISION HISTORY ECO REV __ VOUT VIN VIN E6 6V - 55V D + C9 4.7uF 63V DESCRIPTION APPROVED PRODUCTION 2 DATE WALKER B. 05-12-10 VOUT C3 2.2uF 100V 1210 L1 100uH C7 2.2uF 100V 1210 CDRH8D43HP-101NC GND C2 4.7uF 50V 1206 R7 270K 0603 E5 E1 R1 93.1K C1 4.7uF 50V 1206 D LED1- VOUT E2 R4 3.01K LED2E3 D4 OPT LED3- EN/UVLO 1 ON 2 OFF 3 R9 91K E4 D1 bias DFLS160 1 E14 C8 4.7uF 25V 0805 2 C4 0.22uF 0603 fault JP1 C 50 VREF R11 100K 30 R12 100K 29 R13 100K 28 33 CTRL3 E11 E12 37 FAULT BIAS 24 LED3 21 LED2 20 LED1 VOUT FB 2 19 44 48 25 6 R19 49.9K 13 R21 100K 0603 PWM2 PWM3 CTRL1 CTRL2 GND 31 C CTRL3 R17 100K t 9 53 NC NC NC NC NC NC NC NC NC NC NC E10 CTRLM GND 32 R14 100K PWM1 ISET3 CTRL2 TSET R16 82.5K EN/UVLO ISET2 CTRL1 VIN ISET1 PWM3 E9 7 R15 8.87K RT PWM2 E8 4 E7 FAULT VREF VREF VIN SYNC PWM1 51 DA BOOST E16 SW 46 E15 EN/UVLO BIAS R10 100K R22 33.2K R23 20K R24 20K 11 12 18 22 23 26 34 35 39 41 43 16 15 14 R18 100K 17 B 27 B R25 20K U1 LT3596EUHG SYNC E13 R20 10K NOTE: UNLESS OTHERWISE SPECIFIED CUSTOMER NOTICE 1. ALL RESISTORS ARE 0402 A THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 APPROVALS LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APP ENG. APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. 4 3 TECHNOLOGY AK 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only WALKER B TITLE: SCHEMATIC 60V STEP-DOWN 3-CHANNEL LED DRIVER SIZE N/A SCALE = NONE 2 DATE: IC NO. LT3596EUHG REV. 2 DEMO CIRCUIT 1542A Friday, June 25, 2010 SHEET 1 1 OF 1 A