5 4 3 2 1 REVISION HISTORY ECO REV __ Q6 Si7135DP VOUT ROFB1 1.00M R51 0 C35 0.01uF F1 6.3A 26 VIN+ 22 E17 GND NTC CNTC OPT 10 BIAS OPT R38 OPT 2 BIAS CLN E14 1 D8 9 R20 D9 BZX84C3V0 BIAS 1 FLT GND GND 6 24 CL 28 GND R39 OPT J5 TMR CCX OPT RCX 10K NOT ON THE BOARD CBIAS 1uF 10V IBMON CIBMON 1000pF CIIMON 1000pF E10 IIMON JP1 LED2 R46 2.2K INTVCC GRN 3 1 4 E13 E12 C33 4.7uF 10V E11 B 2 R47 4.7K BIAS RED BIAS 2 RNTC2 10K 6 R50 20K R44 38.3K + - 3 OUT 8 1 OPTIONAL THERMAL PROTECTION FOR Q6 DURING VOUT-SYS SHORT CIRCUIT R45 1.00M HYST 6 REF 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 AK DAVID B. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 3 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 14.6V, 5A BATTERY CHARGER WITH HIGH EFFICIENCY, 6-36 VIN, STEP-UP/DOWN DC/DC CONVERTER SIZE THERMAL REGULATION FOR Q7 DURING 'INSTANT-ON' OPERATION 4 1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE IN MICROFARADS, 0603. 2 IN- NOTE: UNLESS OTHERWISE SPECIFIED Q8 2N7002L GND 5 6 REF IN+ V+ 7 4 R59 1.00M 5 3 HYST V- R57 20K Q9 2N7002L 1 NTC 1 6 R58 38.3K 8 V- RNTC3 10K IN- OUT U3 LTC1540CMS8 R49 100K 2 5 + - R48 10K 2 4 IN+ GND 3 V+ 7 R56 68.1K IL 3 U4 LTC1540CMS8 1 R55 10K 3 2 2 3 CHRG RCL 24K RIL 18.2K DISABLE B 4 IL TMR 5 IL CTMR 0.1uF CHARGE ENABLE IBMON TMR 1 RVM2 10K CX 2 IIMON 27 7 CHRG 8 RVM1 36.5K 25 CIN 1uF 50V 1210 VIN+ ENC VM IN FLT C 23 1 C A BAT 14.6V / 5A NTC LTC4000EGN VIN D 11 U2 RST 05-11-11 NTC FBG 12 BAT BFB 13 14 15 17 CSN BGATE ITH DATE DAVID B. GND J4 CBAT 2.2uF 25V 0805 RBFB2 84.5K RBFB1 1.00M RUN FROM PAGE 2 E15 E20 R42 OPT ROFB2 84.5K OFB IID CC 20 7 6 5 8 APPROVED VOUT-SYS 15V 6.25A LIMIT J3 E18 16 0.1uF 3 2 1 R43 OPT CSP 14.7K R52 0 R53 OPT 18 CC2 19 RC1 RCS 10m 3 2 1 4 CC1 OPT 21 D 7 6 5 8 IGATE R54 0 CL 2.2uF 25V 0805 Q7 Si7135DP 4 ITH DESCRIPTION PRODUCTION 2 N/A SCALE = NONE 2 DATE: IC NO. REV. LTC4000EGN, LTC3789EGN DEMO CIRCUIT 1721A Wednesday, June 08, 2011 2 SHEET 1 1 OF 2 A 5 4 3 2 1 INTVCC E3 R7 100K E4 VIN VOS+ D PGOOD RFB2 8.06K E6 RFB1 154K EXTVCC CF OPT R41 OPT INTVCC C15 1uF 50V INTVCC R5 15 0805 CIN3 OPT Q2 SiR422DP 2 4 5 3 CCM VOUT PLLIN E8 R24 10K R14 100 VIN C34 10nF R13 100 C19 1.0nF 6 7 R21 121K 1% 8 9 C7 BIAS RUN R30 OPT OPT C8 11 OPT 12 INTVCC 13 R22 OPT B 10 R25 0 C10 2.2uF 14 TG1 SENSE1ITH BOOST1 PGND1 SGND BG1 MODE/PLLIN VIN FREQ INTVCC RUN EXTVCC VINSNS BG2 VOUTSNS ILIM BOOST2 TG2 IOSENSE+ + CIN2 56uF 50V SW2 IOSENSE- NC 1 2 3 C4 0.22uF 16V 26 25 R11 10 24 E1 22 INTVCC 20 C24 1uF 4 18 D5 B240A 4 3 C22 0.22uF 16V 17 Q5 SiR496DP BG1 1206 D7 DFLS160 19 D2 BAS16 VOUT1 2 1 D10 BZT52C5V6 Q10 OPT (FZT603) GND COUT1 150uF D6 20V B240A + C1 C2 C16 C17 22uF 25V 1210 0.008 2% C3 C23 OPT 16V 1210 COUT2 + 150uF R8 10 VOS+ 20V C C13 1.8nF 1206 R29 3.6 1206 1 BG2 R1 5.6 TG2 16 15 GND 4.7uH C18 10uF 21 D VIN+ VOUT L1 Q4 SiR422DP D4 DFLS160 23 J1 R2 1 2 3 SW1 SENSE1+ 1 R10 SS Q3 VOUT1 SiR496DP 4 27 2 C11 1.24K OPT R60 10.0K ITH CIN1 56uF 50V J2 C12 390pF 1206 8 5 6 7 MODE JP2 3 + 1 2 3 1.24K R9 PGOOD 1 1 PULSE SKIP C 2 VFB 28 2 CSS 0.022uF INTVCC R28 5.6 1206 4 1 2 E7 VIN 6V - 36V 11A LIMIT E2 U1 LTC3789EGN 1 SS C5 C6 3.3uF 50V 1210 0.004 2% TG1 8 5 6 7 C14 0.1uF C9 C25 3.3uF 50V 1210 C26 C27 OPT CIN4 OPT + ITH R40 OPT SW1 CF1 OPT + 1 2 3 E5 SGND VIN+ R20 R27 OPT 8 5 6 7 VLOGIC 8 5 6 7 INTVCC R61 OPT (10K) D11 1 OPT 10V 2 (MM3Z10VT1) SW2 CS B R18 8m 2% EXTVCC EXTVCC R6 E9 R12 R4 R3 OPT OPT 100 100 <------ ------> CUSTOMER NOTICE A CIRCUITRY ON THIS SIDE MUST CONNECT TO SIGNAL GND GROUNDPLANE 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. CIRCUITRY ON THIS SIDE MUST CONNECT TO POWER GND GROUNDPLANE APPROVALS PCB DES. APP ENG. TECHNOLOGY AK DAVID B. TITLE: SCHEMATIC 14.6V, 5A BATTERY CHARGER WITH HIGH EFFICIENCY, 6-36 VIN, STEP-UP/DOWN DC/DC CONVERTER SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only N/A SCALE = NONE 2 DATE: IC NO. LTC4000EGN, LTC3789EGN DEMO CIRCUIT 1721A Wednesday, June 08, 2011 SHEET 2 1 REV. 2 OF 2 A