5 4 3 2 1 VIN E14 OUT OPTIONAL EMI FILTER FB1 MPZ2012S101A C9 2.2uF 50V 1206 E4 7 22 E17 21 E18 23 E10 24 IVINCOMP 15 OUT R24 R25 OPT OPT 10 18 C11 OPT DIM E19 INTVCC B PVIN R18 OPT C5 2.2uF R16 1M 1% 17 19 EN/UVLO TG OVLO R5 22.6k 27 26 R26 OPT 25 DIM PWM INTVCC 20 PWM E12 C12 OPT VREF CTRL SS C3 0.22uF 11 OUT R10 OPT 0402 16 OUT E15 R2 287k R17 249K 0603 R21 OPT R20 OPT PVIN R3 3.0k Q1 OPT SOT23 R19 OPT C4 4.7nF SYNC/SPRD E16 B OPTIONAL FOR BUCK MODE OR BUCK-BOOST MODE GND 9 GND E6 C17 OPT GND 8 D2 ES1B R4 1M FB ISMON 1SN R8 196K R9 24.3K 4 ISP GND R13 OPT LED+ 330mA E5 C GND R14 OPT C16 OPT 1206 3 SHORTLED PVIN R15 OPT SW IVINN 3 5 2 FB C7 0.47uF E13 CTRL U1 LT3952EFE OPENLED C2 4.7uF 100V 1206 2 0.75 1206 29 E11 VIN 28 EN / UVLO C6 1uF 50V 0805 1 ISMON R12 100k VC IVINCOMP R11 100k 13 SHORTLED R7 499k RT C C1 10uF 50V 1206 14 OPENLED C15 OPT 50V 1206 SYNC/SPRD E3 C8 33uF 50V EEHZA1H330XP R22 OPT 0805 R1 DFLS260-7 6 + INTVCC OUT D1 0.015 1206 IVINP E2 M1 Si2307DS 1 R6 GND OUT L1 15uH 7447798151 PVIN PVIN 5V - 36V D OPT 1206 SW C18 OPT 0805 SW C10 0.1uF 50V 0402 E1 C13 C14 R23 OPT 0805 12 D EMI VIN 5V - 36V OPTIONAL FOR BUCK MODE OR BUCK-BOOST MODE L2 4.7uH IHLP2020BZER4R7M11 FB 350kHz JP1 GND E9 A GND E8 1 2 3 4 5 6 LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A Phone: (408)432-1900 www.linear.com CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; TECHNOLOGY Fax: (408)434-0507 HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO LTC Confidential-For Customer Use Only VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED TITLE: SCHEMATIC CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT 60V LED DRIVER PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. WITH INTERNAL 4A SWITCH SYNC OFF GND E7 NOTE: UNLESS OTHERWISE SPECIFIED SIZE 1. ALL RESISTORS ARE 0603. ALL CAPACITORS ARE 0603. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 1630 McCarthy Blvd. Milpitas, CA 95035 CUSTOMER NOTICE SPREAD 4 3 2 N/A DATE: IC NO. REV. LT3952EFE DC2013A 5 SHEET Tuesday, April 14, 2015 1 1 OF 1 A