VIN 2 OFF R7 100K R5 64.9K 1 2 R6 100K JP1 D5 BAT54LP 1 E4 C3 0.01uF 16V * FOR ASSEMBLY ASSY -A U1 LT4256-1CS8 R9 10K R11 8.06K R12 4.42K -B LT4256-2CS8 10K 8.06K 4.42K -C LT1641-1CS8 15K 2.49K 1.30K -D LT1641-2CS8 15K 2.49K 1.30K NOTES: UNLESS OTHERWISE SPECIFIED A * 0603 1 1 1 R14 909 0805 1. ALL RESISTORS ARE IN OHMS, 0402. ALL CAPACITORS ARE IN MICROFARADS, 0402. * GATE 6 UV C2 0.01uF,100V 0603 C9 OPT 0603 PWRGD 3 TIMER R10 42.2K R12 * R13 18K 1206 E5 PWRGD PWRGD LED3 LN1851C ORANGE C4 B 0.068UF 0.22uF CUSTOMER NOTICE CONTRACT NO. 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. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 R9 C 2 B C4 * FB 2 5 D GND D4 BAT46W 2 1 4 C8 OPT 0603 U1 R11 * VOUT +48V@7A VOUT LED2 LN1351C GREEN D6 CMHZ4698 C5 1.5uF 100V 1210 1 2 3 E7 1 ON C TIMER R8 10 SENSE 7 ON R4 18K 1206 68uF 100V OPT GND D2 SMAJ48A +C7 D3 CMHZ5247B 2 1 ENABLE E3 E2 VOUT 3 VIN LED1 LN1351C GREEN 2 C1 0.022uF 100V 0603 2 2 D1 SMBJ70A Q1 SUM90N10-8m2P 2512 R3 18K 1206 1 2 R2 90.9 68uF 100V OPT 2 1 +C6 E6 VCC 8 GND R1 0.007 1W 1 D E1 3 1 VIN +48V 4 2 5 4 3 APPROVALS DRAWN: TECHNOLOGY KIM T. CHECKED: APPROVED: ENGINEER: VLADIMIR O. DESIGNER: 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LTC Confidential-For Customer Use Only TITLE: SCHEMATIC A POSITIVE HIGH VOLTAGE HOT SWAP CONTROLLER SIZE A DATE: DWG NO. DC1354A REV LT4256-1/-2CS8, LT1641-1/-2CS8 Wednesday, September 24, 2008 2 SHEET 1 A-2 1 OF 1