1 2 3 4 5 7 8 REVISION HISTORY D1 1 15V GND R1 47k 5% C2 10µF 1206 3 C1 2200pF 0805 OPT R5 0 OPT 2 E4 BZT52C15LP E2 R3 226k M1 DMP58D0LFB E3 5V - 35V A C3 10µF 1206 C4 10µF 1206 R7 10k 5% INFET CLP R9 0 0603 OPT R8 1.0k 5% R14 0 0603 B 6 CLN SYS R17 0 0603 OPT R13 0 0603 OPT OUTFET INTVCC DRVCC 0 1 0 2 1 38 0 0 37 36 CHEM1 CHEM0 BST TG 17 R19 C7 0.1µF 3 Rccref 301k 0.1% 0603 CSPM5 16 13 EQ CSP Cc2 0.01µF Cc 0.22µF 10V Rc 200 9 10 CSN EQ NTCBIAS C18 10µF 1206 C19 10µF 1206 NTC 7 GND PGND 14 39 C26 120µF 40V 20% APPROVED DATE GB 2 - 4 - 16 E14 SYS 5V - 35V 10A E13 A E11 GND C21 10µF 1206 C20 10µF 1206 M4 Si7611DN INT_VCC 28 27 25 C13 0.1µF U1.28 C14 10µF 6.3V 20% 0603 U1.28 M3B FDMC8030 B 24 L1 23 M3A FDMC8030 10µH XAL1010-103ME 26 15 C12 0.33µF 10V 20 RSNSB 0.004 KRL3216T4-M-R004-F 1% 19 18 22 E10 BAT 35V 8A E9 12 C Rntcbias 10.0k VC RT + 29 DVCC SCL SDA SMBALERT SGND Rt 95.3k C25 10µF 1206 C24 10µF 1206 C11 1000pF VCC2P5 3 4 5 6 C23 10µF 1206 PRODUCTION FAB 30 CCREFM BATSENSE DVCC SCL SDA nSMBALERT C15 0.33µF 10V MPPT CCREFP C22 10µF 1206 DESCRIPTION 5 E12 Cb 0.47µF 16V SW 1.0MEG 5% 31 Db 1N4448HLP BG 2 32 REV - C17 0.1µF Cpn 1µF 16V OPT 33 CELLS2 CELLS1 CELLS0 R18 0 0603 21 1 4 R16 0 0603 R12 0 0603 ECO R21 0 C16 1000pF C6 100pF 5% 3 M2 DMN62D1SFB 2 R15 0 0603 R11 0 0603 OPT JP1 MPPT ON OFF INT_VCC U2 NC7SZ04L6X R10 0 0603 OPT 34 UVCLFB SYSM5 R2 10k 5% R20 0 35 VIN 8 RSNSI 0.003 KRL3216T4-M-R003-F 1% M5 FDMC8327L C5 10µF 1206 U1 LTC4015EUHF R4 64.9k R6 10.0k INT_VCC C 6 E1 VIN C9 10µF 1206 C8 2.2µF 6.3V 11 C10 10µF 1206 E8 E7 GND CBAT PHYSICALLY CLOSE TO OUTPUT SENSE PIN OF RSNSB JP2 NTC E6 NTC INT EXT 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 APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. D TECHNOLOGY NC GB TITLE: SCHEMATIC SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 1 2 3 4 E5 NOTES: UNLESS OTHERWISE SPECIFIED 1. RESISTORS: OHMS, 0402, 1%, 1/16W 2. CAPACITORS: 0402, 10%, 50V 5 IC NO. N/A SCALE = NONE 6 NTC GND 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only 35V SYNCHRONOUS STEP-DOWN CONTROLLER BATTERY CHARGER REV. LTC4015EUHF DEMO CIRCUIT 2039A DATE: 2 - 4 - 16 5 SHEET 7 8 1 OF 2 D A B C D E INT_VCC R30 100k 5% VCC INT_VCC U6 6 D2 BAS40LP 2 VCCin VCC VCC R23 10k 5% J1 USB Micro B RECEPTACLE TE, 1932788-1 VBUS D+ DGND U3 LTM2884CY A7 4 3 2 U4 VCC A2 A1 VCC VCC VCC VCC VCC2 VCC2 VCC2 VCC2 VBUS VLO2 D1+ D1- D2+ D2- L11 L10 L9 L8 C29 10µF 20% 6.3V 0603 OPT L5 L2 L1 Vdd VUSB3V3 RA5 RA4 RB7 RB6 RB5 RB4 RC7 RC6 RC5 RC4 RC3 RC2 RC1/ICSPCLK RC0/ICSPDAT RA0/D+/ICSPDAT2 RA1/D-/ICSPCLK2 5 A5 A4 A3 A6 B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 B11 VLO ON SPND-PWR 1 GND2 GND2 GND2 GND2 GND2 GND2 GND2 GND2 GND2 GND2 GND2 GND2 GND2 GND2 GND2 GND GND GND GND GND GND GND GND GND GND GND GND L3 L4 L6 L7 K1 K2 K3 K4 K5 K6 K7 K8 K9 K10 K11 C32 1000pF R27 4.7k 5% R28 4.7k 5% R29 4.7k 5% 0.1" RA3/MCLR/Vpp Vss PIC16F1459-I/ML 19 20 Vcc DVcc SCL nSMBALERT SDA GND J4 OPT 18 C30 0.47µF 16V 16 15 EQ VCC R32 0 C31 0.1µF 14 A11 A10 A9 A8 7 6 3 GND GND ID 1 C28 10µF 20% 6.3V 0603 NC7SZ04L6X TP1 TP2 7 8 9 10 DVcc SCL nSMBALERT SDA 6 5 2 3 4 11 12 13 0.1" EQ AUX_SCL AUX_SDA nWP INT_Vcc GND 3 J3 OPT VCC EPAD 17 R25 4.7k 5% 21 R26 4.7k 5% U5 8 VCC 2 3 VCC J2 1 SCL SDA WP 7 RH count+ 100k Close to J1.1 C27 10µF 20% 6.3V 0603 R22 1.0 5% R31 0 OPT 4 4 40V 3 4 GND 5 RW RL NTC 6 CAT5140ZI-100-GT3 4 2mm ICD INTERFACE R24 10k 2 NUMBER OF CELLS 1 CELLS2 CELLS1 CELLS0 CHEM1 CHEM0 CHEMISTRY Invalid L L L Li-Ion Programmable L 1 L L H Li-Ion 4.2V/Cell Fixed H H 2 L H L Li-Ion 4.1V/Cell Fixed L Z 3 L H H Li-Ion 4.0V/Cell Fixed Z L 4 L L Z LiFePO4 Programmable L H 5 L Z L LiFePO4 Fixed Fast Charge H Z 6 L H Z LiFePO4 Fixed Standard Charge Z H 7 L Z H Lead-Acid Fixed Z Z Lead-Acid Programmable H L 8 L Z Z 9 H L L Invalid H L H Invalid H H L 12 * H H H 2 INT_VCC L NOTES: UNLESS OTHERWISE SPECIFIED 1. RESISTORS: OHMS, 0402, 1%, 1/16W 2. CAPACITORS: 0402, 10%, 50V 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 APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. * Lead-Acid Only TECHNOLOGY NC GB TITLE: SCHEMATIC SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. A B C IC NO. N/A SCALE = NONE D DATE: 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only 35V SYNCHRONOUS STEP-DOWN CONTROLLER BATTERY CHARGER REV. GUI INTERFACE DEMO CIRCUIT 2039A 2 - 4 - 16 5 SHEET E 2 OF 2 1