4 3 2 1 REVISION HISTORY ECO REV DESCRIPTION APPROVED DATE - 2 PRODUCTION FAB GEORGE B. 9 - 17- 13 E10 VIN 4 D1 DFLS240L C2S1 4700pF 5% 50V 0805 E1 Cx EMBEDDED INDUCTOR 3 DISCONNECTED CONNECTED E2 JP1 43T GND C2P1 4700pF 5% 50V 0805 C2S2 0.022µF 5% 50V 0805 R1 1.40MEG JP2 RUN ON VIN > 11V OFF R2 412k 16 C2P2 1800pF 5% 50V 0603 R3 10k FREQ 1.5 MHz 750 kHz JP3 7 6 Lr 47µH R4 2.0k PROG 5% R12 100k 5% E9 GND E8 nFAULT IN FAULT CHRG RUN INTVCC NTC E4 R11 100k 5% E7 15 14 nCHRG INTVCC D2 DFLS240L 1 BOOST 2 C4 2.2µF SW 4 CHGSNS 8 BAT 9 DHC NTC 10 BATSNS/FB 13 PROG R5 3.01k 6.3V C3 0.01µF 3 L1 15.0uH 0603 VBAR C1 10uF 16V 0805 E6 BAT 2.7 V - 11V C2 400mA 47uF 16V E5 1210 GND R12 TO BE CONNECTED TO " BAT " NODE AT BAT TURRET (E6) NC/FBG GND VPROG INTVCC FREQ 12 4 5V - 40V U1 LTC4120-4.2EUD / LTC4120EUD 3 D3 DFLS240L Embedded Inductor E3 C5 10µF 50V 1210 D4 DFLZ39 39V R9 * 11 R10 * J1 OPT GND 5 17 1 2 3 2 BAT GND ENTC 2 DF3-3P-2DSA R8 0 JP4 NTC INT EXT * R6 0 R7 10k ASSY -A UNLESS NOTED: RESISTORS: OHMS, 0402, 1%, 1/16W CAPACITORS: uF, 0402, 10%, 50V -B 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. 1 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 4 3 2 U1 OPEN 1.40MEG LTC4120EUD APPROVALS PCB DES. APP ENG. TECHNOLOGY NC GEORGE B. R10 R9 LTC4120 - 4.2EUD 0 Ohm 1.05MEG 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 400mA WIRELESS SYNCHRONOUS BUCK BATTERY CHARGER SIZE N/A SCALE = NONE DATE: IC NO. REV. LTC4120 - 4.2EUD / LTC4120EUD DEMO CIRCUIT 1967A - A / B 9 - 17 - 13 SHEET 1 1 2 OF 2 1 4 JP5 VBAR 3 2 MONITOR ENABLE 3 U2A 5 LTC1445CDHD DISABLE R13 10k 2 4 VPROG C6 0.01µF 4 7 1 LTC1445CDHD V-REF 8 6 9 1 2 94% 5% 3 U2B 1.221V LTC1445CDHD CHG CURRENT D12 149 17 5% U2E R32 1k 1 R15 22.6k R14 432 1.186V 1 2 81% 2 69% 2 56% 5% 3 11 16 LTC1445CDHD R16 34.8k 10 R30 1k D10 1 5% 149 17 U2D LTC1445CDHD R17 100k 3 4 D11 149 17 U2C C7 1µF 10V R31 1k 3 13 15 12 R29 1k D9 1 5% 3 149 17 3 R18 100k U3A LTC1445CDHD 5 2 1.186V 2 44% 2 31% 149 17 3 U3B LTC1445CDHD 7 1 6 R20 100k 2 D8 1 5% 4 R19 100k R28 1k R27 1k D7 1 5% 149 17 2 3 U3C LTC1445CDHD R21 100k 11 16 R26 1k D6 1 2 19% 2 6% 5% 10 149 17 3 U3D R22 100k 13 15 LTC1445CDHD R25 1k 5% 12 D5 1 UNLESS NOTED: RESISTORS: OHMS, 0402, 1%, 1/16W CAPACITORS: uF, 0402, 10%, 50V 149 17 R23 100k CUSTOMER NOTICE R24 49.9k 4 C8 0.01µF U3.3 C9 0.01µF U2.3 R34 787k C10 1µF 10V 3 V-REF R35 432 9 1 8 R33 22.6k U3E LTC1445CDHD 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. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 2 APPROVALS PCB DES. NC APP ENG. GEORGE B. TECHNOLOGY TITLE: SCHEMATIC BAR GRAPH FOR 400mA WIRELESS SYNCHRONOUS BUCK BATTERY CHARGER SIZE 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 DATE: IC NO. REV. LTC4120 - 4.2EUD / LTC4120EUD DEMO CIRCUIT 1967A-A/B 9 - 17 - 13 SHEET 2 1 2 OF 2 1