REVISION HISTORY 1. ALL RESISTORS ARE IN OHMS, 0402, 1%, 1/16W. BATTERY 1 2. ALL CAPACITORS ARE IN MICROFARADS, 0805, 20%, 25V. BATTERY 2 NOTES: UNLESS OTHERWISE SPECIFIED 3. INSTALL SHUNTS ON JUMPERS AS SHOWN. VREG 2.5V BATY LED TERM1 OFF OFF OFF ON BATTERY 3 ON BATTERY 4 ON TERM2 TERMINATION VOLTAGE 0 0 ± 12.5mV 1 0 ± 25mV ON 0 1 ±50mV OFF 1 1 ± 100mV ECO TP8 NG5 SD JP2 JP3 CONT. JP1 TIMER ISET R31 1.82M R32 1.82M 5 6 7 8 VH VL TP10 NG7 NG7 Q7 SiR882DP 3 2 1 R26 1k R27 1k R28 1k R29 1k OVFLT E5 OVFLTB 19 BATY 18 BATX 17 NG9 BATY E6 NG8 16 15 GND DONE BAL CP UVFLT CM OVFLT BOOST BATY V4 BATX V3 NG9 AUXP AUXN NG8 V1 CP TP17 37 38 TP1 1210 2 BAT4_K 3 BAT3_K BAT4 1210 C15 10uF 1206 4 C6 1206 10uF 1206 AUXP_K F9 1/4A R12 10 AUXP C16 1206 10uF 1206 F10 1/4A 6 BAT2_K C13 10uF 1206 GND_K C14 10uF 1206 1206 BAT1_K 1 2 3 Q8 3 2 1 E23 TP6 NG2 SiR882DP NG2 E24 TP11 R17 NG8 NG8 10 AUXN_K AUXN_K C12 10uF 1206 TP12 NG9 NG9 TP5 NG1 NG1 0805 R18 E19 F2 7A F7 1/4A BAT2 1206 9.5V-15.5V F1 7A 4.7uF BAT1_K F8 1/4A BAT1 1206 9.5V-15.5V GND GND E14 SiR882DP GND_K 3.3V - 5.5V GND_K E15 R36 100k BALB C11 4.7uF GND_K D3 LED-LN RED PTCFLT GRN R37 2k DONE D6 LED-LN RED D5 LED-LN GRN D4 LED-LN R38 2k BAL R39 2k UVFLT D7 LED-LN RED R40 2k OVFLT R41 2k D8 LED-LN GRN BATY VEXT_RTN E16 E13 BAT1_K E21 1206 6.04K 1 2 3 E12 BAT2_K E20 1206 C1 R1 Q1 8 7 6 5 E11 BAT3_K BAT1 R10 12.1k 10 VEXT 1 2 3 SiR882DP Q9 SiR882DP 3 5 2 6 1 7 8 R9 6.04k 1206 6.04K 8 7 6 5 BAT3 F6 1/4A BAT2 R2 Q2 F3 7A 9.5V-15.5V 4.7uF BAT2_K R11 12.1k 0805 5 6 7 8 E18 1206 C2 9.5V-15.5V AUXN AUXP_K 1 2 3 Q3_2 SiR882DP 8 7 6 5 E8 E9 1206 BAT3 4.7uF BAT3_K R3 3.01K 8 7 6 5 R8 6.04K 5 Q3_1 SiR882DP PTGLESARR15M1B51B0 t CMMSH1-100G C5 10uF D2 CMMSH1-100G 1206 TP18 CM R35 249 BOOST 1 RT1 D1 R19 665 R34 665 39 7 NG1 NG1 8 NG2 NG2 9 NG3 NG3 10 NG4 NG4 11 NG5 NG5 12 NG6 13 NG7 NG7 14 NG6 V2 BATX E7 SiR882DP 8 7 6 5 E10 BAT4_K 9.5V-15.5V 1 36 35 GND_K NC 33 32 34 EN1 EN2 31 30 VREG 28 29 ISET 27 VL VH 26 25 24 PTCFLT TP13 NG3 NG3 2 20 MODE 21 UVFLTB TERM1 BALB TERM2 22 CTBAT DONEB BAT4_K C3 6.04k 4 R25 1k 23 1 2 3 4 R24 1k PTCFLTB CTON R23 1k CTOFF LTC3305EFE BAT4 F5 1/4A Q4 R7 R16 10 DONE E2 C4 4.7uF R13 10 R4 6.04K U1 UVFLT E4 10 R33 1.82M F4 7A BAT4 1206 6.04k 4 R30 1.82M 9- 23 - 14 R6 R15 TP16 TP15 TP14 CTBAT 1 2 3 TP7 NG4 NG4 PTCFLT E1 BAL E3 NG6 3 2 1 4 CTON 0 EN TP9 NG6 C10 1uF 16V 0603 10% SiR882DP 8 7 6 5 4 TP2 0 JP4 1 MODE DATE JD Q5 4 CTOFF TP3 46.4k 12.1k 1 EN APPROVED R14 10 4 TP4 C9 10nF 50V 5% 28.7k TERM1 PRODUCTION FAB 4 C8 10nF 50V 5% C7 33nF 50V 5% R20 TERM2 R21 DESCRIPTION 3 R5 6.04k SiR882DP 5 6 7 8 VREG R22 NG5 Q6 E17 GND_K REV 4 BATX LED 4 BATTERY BEING BALANCED PTCFLTB DONEB BALB UVFLTB OVFLTB BATY E22 Q10 CMPDM8120 D9 LED-LN GRN R42 2k BATX BATX R43 2k 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 APP ENG. 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. TECHNOLOGY NC JD TITLE: SCHEMATIC LEAD ACID BATTERY BALANCER SIZE IC NO. 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: 9 - 23 - 14 REV. LTC3305EFE DEMO CIRCUIT 2043A 3 SHEET 1 OF 1