5 4 3 2 1 REVISION HISTORY ECO REV DESCRIPTION _ 2 PRODUCTION APPROVED JOSHUA Y. DATE 10-14-14 SEE NOTE 3 D E1 R1 1 5% 0805 6.5V - 60V C1 1uF 1210 E2 R2 100K 2 4 6 8 EN 1 3 5 7 ON REG OFF 1 2 E3 R10 E11 100K 5% PROG GND 3 R4 3.01K E4 4 5 NTCBIAS 10 BAT EN NTC 412K 7 CHRG C R8 8 E8 6 TIMER GND EXT + 1 2 INT NTC JP5 TIMER 3 B 1 OFF R6 100K 3 ON CUSTOMER NOTICE 1. ALL RESISTORS ARE IN OHMS, 1%, 0603. ALL CAPACITORS ARE IN MICROFARADS, 0603. 2. VBAT SET BY JP4. DO NOT CHANGE JP4 WITH VIN APPLIED. 3. OPTIONAL CIRCUIT FOR EVALUATION WITHOUT BATTERY. 5 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 3 TECHNOLOGY TIMER 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 A 60V LINEAR CHARGER WITH LOW QUIESCENT CURRENT SIZE IC NO. DATE: REV. LTC4079IDD N/A SCALE = NONE B CTMR .068uF LT JOSHUA Y. E9 ON 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. 4 LED OFF 2 JP3 NOTES: UNLESS OTHERWISE SPECIFIED R9 12K .5W 1210 LED1 - GRN 1 JP2 E10 CHRG VIN R5 100K NTC A 2 11 E5 3 GND 9 FBG NTCBIAS 4.2V E7 SEE NOTE 2 FB PROG 1 SEE NOTE 2 3 C IN 8.4V JP4 C3 1uF 1210 D BAT 100mA C2 6.8uF 1210 VBAT U1 LTC4079IDD JP1 R11 12K 5% 0805 R7 1.07Meg 0805 2 GND R3 768K 0805 R12 2.55Meg 0805 GND VIN E6 VIN 2 DEMO CIRCUIT 2133A Tuesday, October 14, 2014 SHEET 1 2 1 OF 1