A B C D E 75% 84%** 96% 3 4 ON JP4 DMAX + OFF D5 2 1 CIN4 33uF 63V HVH PDZ6.8B 4 ROSC CC1 15nF RC1 13.7k 3 43.2k CSS 5 6 10nF 7 R1 12.4k CC2 100pF 8 9 P10 R9 110k 11 RF 0 P11 12 SENSE1+ SENSE1- PHASEMODE RUN FREQ VIN SS INTVCC ITH G1 FB PGND SGND G2 CLKOUT NC SYNC SENSE2- PLLFLTR SENSE2+ R3 20 C2 2.2uF 19 845k CU1 4.7uF CIN1 CIN2 CIN3 4.7uF 100V 18 E2 COUT1 COUT2 COUT3 COUT4 47uF 16V R7 OPT R8 .005 1W C4 10nF R4 10 E4 E5 * GND * See Demo Manual +VOUT * 12V / 6A GND 3 CS4 4.7uF 100V CS3 4.7uF 100V 14 13 E3 VOUT D2 V8P10 Q3 OPT Q4 BSC060N10NS3G 15 +VIN 6V-60V 220uF 16V APXE 17 16 E1 4.7uF 100V D1 V8P10 COUT5 COUT6 R11 249k 21 4.7uF 100V 1 2 3 4 E6 Vu1 1 GND E7 GND E8 GND T1 7448709060 6.8uH +VIN Q5 1 2 3 PBSS9110T 1 2 2 5-23-12 R18 OPT R17 0 2 D3 PBZ6.8B 2 R19 100k 1 3 BC847T DATE +VIN 22 2 Vu1 Goran P. 1 CS1 R6 .005 1W C3 10nF D4 BAS516 R20 180k Q7 APPROVED 4 R5 OPT 1nF 23 SLOPE VOUT C5 10nF C1 24 25 CF 0.01uF 10 DMAX BLANK DESCRIPTION PRODUCTION T2 7448709060 6.8uH 3 2 R10 10 3V8 GND 3 2 + 2 REV __ Q1 OPT CS2 Q2 BSC060N10NS3G U1 LTC3862EFE-2 1 ECO 2 1 JP3 SLOPE 3 2 1 JP2 BLANK 3 2 1 3 2 1 JP1 PHASE +VIN RUN SW1 3 2 1 4 1.66 1.0** 0.625 325ns 250ns** 175ns 180° 120° REVISION HISTORY R15 10k R13 220k R12 33k Q8 PMST5550 3 PMST5550 1 Q6 3 R14 56k 2 2 1 CUSTOMER NOTICE R16 10k Optional Bias Circuit 1 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. TECHNOLOGY HZ GORAN P. TITLE: SCHEMATIC LOW NOISE POLYPHASE SEPIC POWER CONVERTER SIZE IC NO. N/A THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. A B C SCALE = NONE 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only DATE: D REV. LTC3862EFE-2 DEMO CIRCUIT 1891A 2 SHEET 1 Wednesday, August 01, 2012 E OF 1 1