5 4 3 2 1 24 RBFB1 1M RBFB3 84.5k OPT U1 * D1 BZT52C3V0S-7-F SOD323 IL/IFB 2 VOUT- SYS E11 GND E12 J7 BAT CBAT 150uF 35V E6 GND E13 BAT E14 GND NTC NTC 14 BIAS 13 E15 CNTC OPT R2 OPT RST RCX CCX OPT RCL 24.3k CBIAS 1uF 16V * CHRG_LED ENABLE GND E21 GND CIBMON 1000pF R4 E17 IIMON BIAS D3 RED D2 GREEN R5 2.2k 100k DISABLE E7 DISABLE E8 * OPTIONAL THERMAL PROTECTION FOR Q1 DURING VOUT-SYS SHORT CIRCUIT R18 4.7k JP3 ENABLE FLT_LED R6 4.7k R7 D4 RED 100k BIAS E9 LED_PWR THERMAL REGULATION FOR Q2 DURING 'INSTANT-ON' OPERATION U1 R16 38.3k 4 IN- 5 HYST 6 + - 3 Q6 OUT 2N7002L 4 1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE IN MICROFARADS, 0603. ASSY TP CKT. FOR Q1 REG CKT. FOR Q2 LTC4000 LTC4000 -A -B LTC4000-1 -C NOT LOADED LOADED LTC4000-1 -D NOT LOADED LOADED R21 Q2 / R22 RIFB1 RIL ROFB2 CBGATE SI7135DP OPT 84.5k 2.2uF 10nF LOADED 0 OHM OPT LRC-LRZ-2010LF-R000 SI7135DP OPT 68.1k 18.2k 18.2k RCX 10.0k CL OPT 2k OPT 84.5k 0 OHM OPT 10.0k 2.2uF OPT 10nF NOT LOADED 0 OHM LRC-LRZ-2010LF-R000 68.1k 2k OPT 0 OHM OPT LOADED NOT LOADED CUSTOMER NOTICE 6 REF THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 NOTE: UNLESS OTHERWISE SPECIFIED DISABLE JP1 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. 1 R17 1Meg E10 GND RST_LED ENABLE OPT 8 1 2 IN+ GND R15 20k GND 6 REF 7 3 V- 2N7002L NTC V+ 1 RNTC2 10k 2 R12 1Meg 8 R14 78.7k 2 HYST 6 OUT R13 10k 2 5 + - V+ IN- V- R10 20k IN+ 4 Q5 U3 LTC1540CMS8 1 R11 38.3k 3 3 IL/IFB 7 R9 46.4k C1 4.7uF 10V R19 100k * BIAS U2 LTC1540CMS8 RST E18 BIAS B JP4 FLT RNTC3 10k NOT ON THE BOARD IBMON CIIMON 1000pF CHRGB CHRG * C J8 J9 TMR 2 GND GND 28 GND CCL OPT 10 8 29 CL IL / IFB 4 TMR * RIL CIL OPT GND R3 OPT 7 CX DISABLE JP2 B D E16 ENABLE A 9 3 CTMR 0.1uF CHARGE R8 10k VOUT- SYS CL1 - CL5 OPT 1206 X 5 PLCS BIAS GND BIAS 6 IIMON CHRG ENC RVM2 2.49k CVM OPT IL/IFB TMR 1 * RIFB1 J5 12 1 E5 VM RVM1 35.7k VIN+ 5 VIN+ 3V - 60V IBMON IN CIN 1uF 50V 1210 J4 C + BIAS FLT 27 07 - 03 - 12 NTC CLN 11 E4 DATE DAVID B. ITH E3 26 APPROVED PRODUCTION FAB LTC4000EUFD / LTC4000EUFD - 1 VIN RIS1 0.015 DESCRIPTION 1 * CHRGB OPT GND REV - CL 50V 1206 F3 FUSE OPT RBFB2 15 21 17 18 19 20 * ROFB2 OFB R1 BAT BIAS VIN TO DC / DC BGATE J3 CC OPT 23 0.1uF 4.22k 25 PULLUP ROFBX OPT * R21 0 IID R20 CBGATE RBFBX OPT 16 CC2 RC1 ROFB1 1M 7 6 5 8 * CIGATE OPT ITH E20 RIG OPT CSP CC1 OPT E19 RBG OPT CSN J2 3 2 1 CHRGB GND 3 2 1 4 GND 7 6 5 8 COUT 2.2uF 50V 1206 22 E22 IGATE E2 Q4 OPT BFB GND RCS 0.01 ECO J6 F2 FUSE FBG 4 Q3 OPT 7 6 5 8 4 VOUT 1 REVISION HISTORY F1 FUSE OPT Q2 / R22 3 2 1 E1 2 * 7 6 5 8 4 J1 VOUT FROM DC / DC 3V - 30V D 3 Q1 Si7135DP 3 APPROVALS PCB DES. NC APP ENG. DAVE B. TECHNOLOGY 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 BATTERY CHARGER CONTROL AND POWER MANAGEMENT SIZE IC NO. N/A SCALE = NONE 2 DATE: LTC4000EUFD / LTC4000EUFD - 1 DEMO CIRCUIT 1830B - A / B / C / D 07 - 03 - 12 SHEET 1 1 REV. 1 OF 1 A