5 4 J1 C16 0.1uF 100V 0402 E1 2 1 L2 3.2uH 7443550320 FB1 OPT EMI VIN 4V - 60V 3 C14 4.7uF 100V 1206 C15 4.7uF 100V 1206 VIN J2 C2 4.7uF 100V 1206 C6 1uF 100V 0805 VIN EN/UVLO E3 9 VOUT EN/UVLO BST2 BST1 R8 221k CTRL2 C VIN CTRL1 SW1 BG1 U1 LT8391EFE CTRL1 R11 100k 5% VREF R15 100k 5% LSP 12 17 E6 RP 10 1 LSN VREF BG2 FAULT SW2 TG2 RP FB R16 200k 2 ISP 3 EXT/ON JP1 GND EXT SYNC 6 NO SPREAD/SYNC E8 R4 2.2k INTVCC GND RT R3 100k 400kHz PWM 2 4 3 C20 OPT 0 M1 BSC067N06LS3 R2 0.004 2010 C10 4.7uF 10V R21 0 R23 OPT C21 OPT C17 10nF C3 10uF 50V 1206 C4 10uF 50V 1206 0.05 2010 M5 SI7611DN R5 1M J4 E11 R6 34.8k 10 C LED+ 2A, 25V J3 R9 5.1 5% R27 10 LED- GND E10 28 26 25 19 14 15 B R17 C19 OPT OPT R18 OPT 23 11 C18 OPT PWM EXT 1 2 3 4 5 INTVCC 6 JP3 PWM E9 VREF 1 3 VR1 100K 3314J-1-104E C9 10nF R22 91k 5% CUSTOMER NOTICE A LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; TECHNOLOGY HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED TITLE: SCHEMATIC CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. NOTE: UNLESS OTHERWISE SPECIFIED 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only 60V SYNCHRONOUS 4-SWITCH BUCK-BOOST LED CONTROLLER WITH SPREAD SPECTRUM ALL CAPACITORS ARE 0603. ALL RESISTORS ARE 0603. SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 D1 PMEG6010CEJ M3 BSC093N04LS R26 5 INT INTVCC M4 BSC093N04LS L1 4.8uH Wurth 7443550480 1 6 R1 C11 0.1uF C12 0.1uF R20 OPT R24 ON 8 4 5 PWMTG VC SS C8 100nF 3 JP2 18 29 E7 SYNC/SPRD SPREAD ON OPT 21 SYNC/SPRD 2 INTVCC 1 R19 ISN SYNC/SPRD 20 22 VREF OUT E12 27 M2 BSC100N06LS3 C7 0.47uF INT 50V 0603 24 R25 0 R10 100k 5% INTVCC B CTRL2 R14 OPT 13 R13 OPT D2 OPT CMDZ5231B FAULT TG1 R12 OPT E5 GND E13 VIN 16 E4 D C5 1uF 7 R7 499k C13 33uF 63V 63CE33BS + 1 2 3 C1 4.7uF 100V 1206 E2 5 GND 2 D 4 3 2 N/A DATE: IC NO. LT8391EFE DC2345A REV. 5 SHEET Tuesday, May 03, 2016 1 1 OF 1 A