5 4 3 2 1 REVISION HISTORY S11 17 1 1 R6 100 1% C6 18 CELL3 6 CELL2 5 CELL1 4 CELL0 3 2 R30 475 R42 33 2512 1% 19 C6 100nF Q6 LED6 R18 3.3k 1 7 20 21 S6 RQJ0303PGDQALT 3 22 R5 100 1% C9 A0 S9 GP102 C8 GP101 S8 WDTB C7 TOS S7 VREG C6 VREF S6 VTEMP2 C5 VTEMP1 S5 NC C4 V- S4 C0 C3 S1 S3 C1 C2 S2 +5V A3 39 A2 38 A1 37 A0 36 GPI02 GP102 35 GPI01 GP101 K1 WDTB L2 WDTB 33 TOS R50 1M 3 L1 R52 1M VREG VREF 30 VTHEMP2 C15 R41 33 2512 1% 29 VTEMP1 C17 4.7uF 10V 0805 27 R40 33 2512 1% 26 25 A3 R55 110k 1206 1% 24 23 Q13 1 2N7002 A3 +12V C4 100nF A1 1 0 A0 C3 1 1 B8 A7 VL ON A8 B7 VCC 3 13 JP2 5 EEGND NC 14 3 VREG GND1 VIN GND3 VCC CS MISO SCK MOSI 1 GND2 3 11 JP1 10 R62 4.99K R63 4.99K 1% 6 3 2 C2 100nF 1 SCL 1% C19 9 12 100nF 1 B 2 6 4 8 EESCL EEVCC EESDA EEGND NC 14 WP A2 A1 A0 SDA S2 RQJ0303PGDQALT 5 U3 24LC025-I/ST C1 2 C1 100nF 1 Q1 R13 3.3k 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 APP ENG. APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. S1 RQJ0303PGDQALT R56 0 C0 R61 0 TECHNOLOGY MI JON M. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. ISOLATED 12-CELL BATTERY MONITOR 4 3 2 N/A 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 TITLE: SCHEMATIC SIZE 5 EESDA H1 3 7 100 1% EEVCC SPI BUS IN C2 R14 3.3k 4 8 EESCL HOSTGND 3 S3 100 1% 6 JP3 I 0 2 EXT HOST 7 TOS SCK MOSI 1 E2 VREG S4 R15 3.3k Q2 3 1% I 2 A LED1 R37 33 2512 JP4 C3 100nF R1 R25 475 0 CS MISO C 1 +5V SOURCE JP6 E3 EXT +5V 3 RQJ0303PGDQALT LED2 R38 33 2512 JP5 I 1 R2 1% 1 VCC 3 VREG A0 Q3 3 R26 475 I 4 1% 0 A2 TOS R39 33 2512 1 VIN GND3 VREG VREG A2 A1 R54 10K 1% C4 R3 100 1% R27 475 0 GND1 GND2 12 2 LED3 7 CELL12 RQJ0303PGDQALT 3 5 9 S5 R16 3.3k 1 LED4 R28 475 AV- 13 10 2 Q4 K6 AVCC2 VTEMP2 28 C5 100nF R4 100 1% 3 3 11 RQJ0303PGDQALT B I2 1uF C5 R17 3.3k 1 R29 475 E1 LTC6803 V- A4 I1 C14 1uF H2 SPI BUS OUT A2 DO2 SDI K7 32 31 A5 A6 SDOEB SCK2 MBR0540 A3 CSB LTM2883Y-5S SDI2 L3 VREG U2 D3 A1 SCK SDO2 L4 2 Q5 LED5 CS2B R60 OPT B1 DO1 SDO 2 1 AV+ L5 R51 1M VCC K8 40 34 L6 A1 L8 S10 V+ A2 VCC2 A3 C10 CK 2 16 RQJ0303PGDQALT S11 41 C22 1uF 8 1% S7 SCKI DI VCC CELL4 15 R19 3.3k C11 42 GND CELL5 8 R43 33 2512 14 SDI +12V +5V GND 9 R31 475 C7 100nF SD0 S12 DO B5 CELL6 13 2 Q7 C12 4.3k 43 GND 10 3 LED7 CSBI B4 CELL7 12 C7 V+ CS GND CELL8 11 11 100 1% R53 44 GND CELL9 12 9 10 S8 RQJ0303PGDQALT R7 CK B3 13 1% R20 3.3k D1 B2 CELL10 8 C8 100nF Q8 R44 33 2512 DO GND2 CELL11 14 R32 475 C20 1uF 100V 1206 C21 1uF 100V 1210 3.24M 1% GND2 6 2 LED8 CELL12 15 6 FB K5 C D +54V R59 GND2 5 C8 7 3 CELL VOLTAGES 53V MAX J1 16 SHDN MBR0540 GND2 4 S9 100 1% 1 8 7 VOUT 11 3 RQJ0303PGDQALT R8 CNTRL 9 K4 1% C9 100nF R21 3.3k CAP 2 R45 33 2512 CS LTC6803IG-4 1 2 Q9 1 R33 475 C13 100nF 0805 C9 2 LED9 VCC 10 V- 3 100 1% CAP JON M. 3 +5V VU1 S10 RQJ0303PGDQALT R9 SW GND APPROVED D1 BAT54S L7 R22 3.3k GND 2 1% R49 100 1% C10 100nF Q10 1 R46 33 2512 C10 2 LED10 5 R58 1M 1% +54V R10 100 1% R34 475 3 4 R23 3.3k RQJ0303PGDQALT 3 1 2 25V 0805 2 1% R57 1M 1% C11 100nF 2 R47 33 2512 1 LED11 R35 475 C11 2 Q11 DATE 07/12/11 04/18/14 D2 K3 3 C16 2.2uF PRODUCTION CORRECT L1 VALUE 1 50V 0805 LT3495EDDB-1 K2 R11 100 1% D +12V C18 220nF 1210 U4 S12 RQJ0303PGDQALT DESCRIPTION 2 10uH GND R24 3.3k 1 R48 33 2512 1% REV 1 L1 C12 100nF Q12 LED12 R36 475 C12 2 2 3 ECO +54V GND CELL12 +12V B6 R12 100 1% IC NO. REV. LTC6803IG-4 DEMO CIRCUIT 1835A DATE: Friday, April 18, 2014 SHEET 1 1 1 OF 1 A 5 4 3 2 1 USED TO MANUFACTURE PCB X1 X2 X7 1 1 1 MH1 1 REPRESENTS TOOLING HOLES MH2 1 MH3 MH4 1 1 REPRESENTS STAND OFFS D D C C 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. B TECHNOLOGY APPROVALS DRAWN LTC6803IG-4 www.linear.com CHECKED ISOLATED 12-CELL BATTERY MONITOR B APPROVED ENGINEER JON MUNSON 05/19/11 SIZE CAGE CODE DWG NO Friday, June 24, 2011 REV DC1835A DESIGNER THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. IC.NO DATE TITLE 04/26/11 MI 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 SCALE: NONE FILENAME: 1835a-1.PCB SHEET 1 1 OF A 1 A 5 4 3 2 1