5 4 3 2 OUT FB1 MPZ2012S101A R6 R7 499k EN / UVLO R10 OPT C2 1uF 50V 0805 7 8 E8 9 R11 OPT R8 71.5k VIN 4 EEHZA1H330XP FB E9 23 17 CTRL R12 100k INTVCC R13 100k 1SN CTRL TG VREF PWM OPENLED 26 25 20 OFF GND C3 0.1uF R5 40.2k 2MHz GND GND GND GND VC SS SYNC C13 OPT R22 OPT C5 2.2uF 15 DIM OPTIONAL FOR BUCK MODE OR BUCK-BOOST MODE E15 R23 OPT B OUT R4 10k C4 1nF E14 VREF 29 6 28 5 SPREAD 1 4 DIM SYNC/SPRD 12 2 3 PWM 10 SHORTLED INTVCC 1 INTVCC 13 11 JP1 C R18 0 RT E12 E13 27 INTVCC 21 SYNC/SPRD B IVINCOMP 14 E11 GND ISMON 19 OPENLED E6 R2 1M 0603 16 C11 OPT 22 SHORTLED D2 ES1B VREF 18 R14 100k LED+ 330mA E5 R3 26.7k C7 0.47uF R15 OPT R16 OPT 3 OVLO ISP 24 E10 C6 4.7uF 50V 1206 D R9 25.5k C ISMON 2 0.75 1206 FB U1 LT3952EFE EN/UVLO R1 PMEG6010CEH 3 E3 M1 Si2309CDS OUT D1 SW R17 OPT 0603 C1 10uF 50V 1206 OPT 1206 0.015 1206 5 GND C8 33uF 50V IVINN + 6 E2 IVINP PVIN 8V - 28V E7 1 L1 2.2uH 74437324022 PVIN 2 C10 OPT 1206 SW C9 0.1uF E1 36V TRANSIENT D C12 SW EMI VIN 8V - 28V 1 R21 OPT R20 OPT PVIN Q1 OPT SOT23 R19 E4 OPT FB NOTE: UNLESS OTHERWISE SPECIFIED CUSTOMER NOTICE 1. ALL RESISTORS ARE 0402. ALL CAPACITORS ARE 0402. 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. A TECHNOLOGY TITLE: SCHEMATIC 2MHz 60V LED DRIVER WITH INTERNAL 4A SWITCH SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 2 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only N/A DATE: IC NO. REV. LT3952EFE DC2361A 3 SHEET Thursday, May 07, 2015 1 1 OF 1 A