5 VIN 6V-20V GND DONE E1 VIN C6 10UF,25V CHARGE 1 U1 LT3750EMS DONE R8 100K CHARGE JP1 CHARGE STOP GO 1 2 3 4 C9 0.1UF R5 2.49K 5 VTRANS RBG 10 DONE RVOUT 9 CHARGE RDCM 8 VCC GATE 7 C1 22UF 25V 1812 C3 22UF 25V 1812 +C4 150UF 35V 6 8 12 5 R6 60.4K 9 R9 40.2K 1 D1 MURS160T3 VOUT C7 0.1UF 630V 1812 E3 VOUT 300V +C8 400UF 330V GND 4 E5 GND 10 C SOURCE 6 GND C2 22UF 25V 1812 D WARNING, HIGH VOLTAGE! OPERATION BY TRAINED PERSONNEL ONLY Q1 PH20100S 4 3 1 2 3 C C5 51PF R1 0 1210 R7 100K E6 2 T1 DCT20EFD 7 E2 E4 3 5 6 7 8 9 D 4 JP2 OUTPUT BLEEDER NORMAL OPERATION 1 Q2 KSH50 3 DISCHARGE R11 100K 1206 R2 R3 R4 33K 33K 33K 1206 1206 1206 2 R10 0.01 1% 0805 B B SAFETY CIRCUIT-NOT NORMALLY USED IN PRODUCTION PRODUCTS NOTES: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE 0603. A 2. INSTALL SHUNTS ON JP1-JP2 PIN 2 AND 3. 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 CIRUIT 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 4 3 APPROVALS DRAWN: CHECKED: APPROVED: ENGINEER: DAVID NG DESIGNER: TECHNOLOGY KIM T. TITLE: 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LTC Confidential-For Customer Use Only SCHEMATIC A HIGH CURRENT CAPACITIVE CHARGING CIRCUIT SIZE DWG NO. A DATE: DC891A-1 * LT3750EMS Wednesday, June 22, 2005 2 SHEET 1 1 REV A OF 1