5 4 3 2 1 REVISION HISTORY ECO REV __ 2 DESCRIPTION APPROVED DATE PRODUCTION DB 09-29-15 E1 D D VIN1 VIN J1 VIN1 7V - 100V + CIN1 15uF 100V 8x12 100SXV15M J3 GND CIN3 CIN2 2.2uF 100V 1210 + C1 OPT 8X12 CIN5 CIN4 2.2uF 100V 1210 D2 OPT R3 100K 0805 R5 35.7K E3 D3 OPT C7 OPT 100 R8 1K R13 100K 0805 R12 OPT 0805 OPT C10 22uF 1206 D5 OPT R11 1 0 FREQ 2 C12 0.1uF 6 VIN R18 OPT VFB FREQ 4 5 D6 OPT R14 0 3 R19 10K R17 10K C15 47pF C17 3.3nF TMR R28 OPT GATE FREQ VIN GND SENSE SS CAP VFB RUN ITH C16 OPT GND Q2 SFT1345 U1 LTC7860EMSE VFBN 12 11 10 9 8 7 Q3 ZXGD3005E6TA 1 C11 2 6 4 100pF 5 3 C9 1uF 50V 0805 E4 SW Q4 SUM90P10-19L C E5 VOUT VOUT CAP C13 0.47uF 16V L1 10uH C14 0.1uF 50V 0805 J4 XAL1010-103 R15 13 R10 C 100 R9 C8 OPT 1210 D1 SZMMSZ5242B R7 6m 1225 3W R6 GND OPT D7 NRVTS10100MFST 10A 100V R16 10 0805 VOUT COUT3 COUT2 COUT1 10uF 50V 1210 + COUT4 150uF 50V 10X10 MAX 35V / 10A J5 GND 50CE150AX R20 E6 GND OPT SMMDL914 D8 R21 0 B Q6C Q6 SMMBTA42L R25 205K B R24 31.6K CAP C18 1.5nF Feedback Notes Max Vout = ( ( R24 + R26 ) / R26) * ( ( ( 0.8V / R19 ) * R25 ) + ( Q6Vbe)) V Max Vout = 2 * ( ( 0.08 * R25) + 0.7 ) V where R25 is in"K" R26 31.6K CAUTION, SHOCK HAZARD: CONTACT WITH HIGH VOLTAGE CAN RESULT IN A DANGEROUS ELECTRIC SHOCK. CUSTOMER NOTICE 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 APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. A NOTE: UNLESS OTHERWISE SPECIFIED TECHNOLOGY LT TITLE: SCHEMATIC DB HIGH VOLTAGE SWITCHING SURGE STOPPER SIZE 1. ALL RESISTORS AND CAPACITORS ARE 0603. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 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 SCALE = NONE 2 DATE: IC NO. LTC7860EMSE DC2392A REV. 2 Tuesday, September 29, 2015 SHEET 1 1 OF 2 A 5 4 3 2 1 VIN D OPTIONAL INPUT FILTER VIN R1 L3 R2 0.6uH OPT Q1 SUM90P10-19L OPT 2512 R29 OPT 2512 L2 1uH C2 C3 OPT 100V 1210 D4 OPT R27 OPT Q6C OPTIONAL INPUT FILTER OPT 2512 3 5 2 6 C R23 OPT 4 Q5 BC857BS 1 R22 OPT D OPTIONAL REV. POL. PROTECT CAP VFB ( REVERSE POLARITY PROTECTED ) J2 VIN2 OPT C4 C5 C6 OPT 100V 1210 R4 1m 2512 7V - 100V C VIN2 E2 OPTIONAL FEEDBACK CIRCUIT FOR VOUT < 12V B B CUSTOMER NOTICE 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 APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. A TECHNOLOGY LT DB TITLE: SCHEMATIC HIGH VOLTAGE SWITCHING SURGE STOPPER SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only LTC7860EMSE IC NO. N/A SCALE = NONE 3 DATE: REV. 2 DC2392A Tuesday, September 29, 2015 2 SHEET 2 1 OF 2 A