5 4 3 2 1 REVISION HISTORY ECO REV __ DESCRIPTION 3 E6 2 1 D1 BAV3004W 1 2 R4 270k RIN 392k D Q2 MMBT3904 D2 BAV3004W 2 R5 470k 1 1 D3 BAV3004W DATE 6-5-12 D 3 2 E21 Mitchell L. 1 INPUT 18V - 41V G D M2 S FDB33N25 APPROVED PRODUCTION -100V REVERSE VOLTAGE 2 PROTECTION CIRCUIT 1 SHUTDOWN LEVEL SHIFTER R1 470k R9 270k 3 R3 470k E8 R8 4.7k 1 GND Q1 MMBT3904 2 1 SHUTDOWN R2 470k 3 SD OUT 10 TIMER FB 6 C1 470nF 25V VSS BASE RX OPT 100k 5 CSNUB 10nF 500V + RFB1 12.4k R7 9.1k RFB2 422k D5 GREEN OUTPUT CLOAD 100uF 50V E3 OUTPUT 1.5A MAXIMUM CLAMPED AT 43.1V C E18 CX 10nF 100V OPT Q4 PZTA42 3 1 M1 FDB33N25 G 7 CT 10nF 100V 4 4 RG 8 CG 10nF 100V 2 2 E1 GATE CF 1nF 100V C D7 BAV3004W U1* VDD S R6 270k RSNUB 100 D D4 BAV3004W D6 GREEN INPUT 3 B B RSS 34k R10 200 2 MMBT3904 Q3 1 INPUT RANGE GND DC OPERATING WIDE VOLTAGE RANGE CONSTANT CURRENT LED DRIVER E5 E19 E20 E4 18V - 41V DC SURVIVAL +/- 100V 1ms TRANSIENT * ASSY U1 PART NUMBER DC1850A-A LTC4366HTS8-1 A DC1850A-B LTC4366HTS8-2 PART MARKING BEHAVIOR LTFMC LATCH OFF LTFMF AUTO RETRY CUSTOMER NOTICE 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. APPROVALS PCB DES. APP ENG. TECHNOLOGY HZ Mitchell L. 5 4 3 43.1V SURGE TIMER 2.8ms MAXIMUM LOAD 1.5A 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only TITLE: SCHEMATIC VERY HIGH VOLTAGE SURGE STOPPER SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 250V OUTPUT CLAMP N/A SCALE = NONE DATE: 2 IC NO. REV. LTC4366HTS8 FAMILY DEMO CIRCUIT 1850A 3 Wednesday, June 20, 2012 SHEET 1 1 OF 1 A