Linear Technology DC2043B Quick setup guide

dc2043bfa

DEMO MANUAL DC2043B

Description

LTC3305EFE

Lead Acid Battery Balancer

Demonstration circuit 2043B is alead-acid battery balancer

featuring the LT C

3305. The LTC3305 balances up to four

lead-acid batteriesconnected in seriesand incorporates all

voltage monitoring, gate drive and fault detection circuitry.

The LTC3305 employs an auxiliary battery or an alternative

storage means to transfer charge to orfrom each individual

battery within the stack. There are two operating modes,

TIMER mode and CONTINUOUS mode, selected by the

MODE pin. In TIMER mode, once the balancing operation

is complete, the LTC3305 goes to a low power state for

a programmed time and then periodically rebalances the

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

BoarD photo

batteries. In CONTINUOUS mode, the balancing operation

continues even after the batteries are balanced to their

programmed termination voltage.

The LTC3305EFE is available in a 7mm ×7mm 38-lead

TSSOP surface mount package with exposed pad.

Design files for this circuit board are available at

http://www.linear.com/demo/DC2043B

Figure 1. DC2043B Demo Board Figure 2. Thermal Image of DC2043B

dc2043bfa

DEMO MANUAL DC2043B

operatinG principLe

Refer to the block diagram within the LTC3305 data sheet

for its operating principle.

The LTC3305 balances batteries using an auxiliary battery

or an alternate storage means as a charge reservoir. The

LTC3305 controls external N Channel MOSFET switches

in a preprogrammed sequence to connect a battery in

the stack to the auxiliary battery. Charge is transferred

to or from the auxiliary battery when it is connected to a

battery in the stack.

The LTC3305 can operate in one of two modes, TIMER

mode or CONTINUOUS mode, programmable via the

MODE pin. Balancing operation begins once the CBOOST

capacitor is charged to at least 6.95V. The EN1 and EN2

pins select the number of batteries in the stack.

EN1 EN2 Application

0 0 SHUTDOWN

0 1 2 Battery Stack

1 0 3 Battery Stack

1 1 4 Battery Stack

With the MODE pin set to 0 the LTC3305 will operate in

the TIMER Mode. The BAL pin will be pulled low, indicating

that the part is enabled and balancing the battery stack.

The balancing operation begins with the terminal of the

auxiliary battery connectedto thenegative terminalof BAT1,

the lowest battery in the stack. The bottom switches that

connect the negative terminals of BAT1 to the auxiliary

battery's negative terminal are turned on. After a 50ms

delay, the voltages across the auxiliary battery and BAT1

are compared by the termination sense comparator. If the

voltage difference between the auxiliary battery and BAT1

is less than the selected termination voltage, the battery

is deemed to be in a balance state with respect to the

auxiliary battery. The bottom switches will be turned off

and the next battery within the stack will be connected.

If the voltage difference between the auxiliary battery and

BAT1 is greater than the selected termination voltage, the

top switches that connect the positive terminal of BAT1

to the auxiliary battery’s positive terminals through the

PTC thermistor are turned on. Current is limited by the

PTC thermistor. Figure 3 shows the startup battery current

where the PTC is limiting as it heats up. Figure 4 is the

steady state battery current after the PTC has reached its

thermal equilibrium. After a 50ms delay, the termination-

sense comparator starts to monitor the voltage across the

auxiliary battery and the battery. The battery will remain

connected to the auxiliary battery until the voltage differ-

ence decreases to the selected termination voltage or a

tBAT timeout occurs.

At this point all switches are turned off and the second

battery in the stack will be connected to the auxiliary bat-

tery after a 50ms delay. This 50ms delay provides a break-

before-make function before the next battery is connected.

The cycle will be repeated for each battery in the stack.

Once all batteries in the stack are balanced the DONE pin is

pulled low, the BAL pin is in its high state and the LTC3305

is put into a low power off state. The stack is deemed bal-

anced when for a four battery stack, the termination-sense

comparator detects VTERMINATE on five consecutive cycles

that connect each of the batteries to the auxiliary battery

using the bottom switches only.

performance summary

Specifications are at TA= 25°C

SYMBOL PARAMETER CONDITIONS MIN MAX UNITS

VBAT Battery Voltage Range 4.0 to 16.0 V

VTERMINATE Termination Voltage Range TERM2 = 0, TERM1 = 0 ±5 to ±20 mV

VTERMINATE Termination Voltage Range TERM2 = 0, TERM1 = 1 ±17.5 to ±32.5 mV

VTERMINATE Termination Voltage Range TERM2 = 1, TERM1 = 0 ±42.5 to ±57.5 mV

VTERMINATE Termination Voltage Range TERM2 = 1, TERM1 = 1 ±90 to ±110 mV

VREG Regulator Output Voltage Range IVREG = 200µA 2.4 to 2.6 V

dc2043bfa

DEMO MANUAL DC2043B

operatinG principLe

2.0s/DIV

BATX

5.00V/DIV

BATY

5.00V/DIV

AUX BATTERY

CURRENT

200mA/DIV

dc2043 F03

2.0s/DIV

BATX

5.00V/DIV

BATY

5.00V/DIV

AUX BATTERY

CURRENT

200mA/DIV

dc2043 F04

Figure 3. Start-Up Battery Balancing Current

Figure 4. Steady State Battery Balancing Current

In TIMER mode, the balancing operation continues for a

maximum of the programmed tON time. After the tON time,

LTC3305is put into a low power off state for a programmed

tOFF time, even though the batteries may not be balanced.

Once the tOFF time expires, the LTC3305 is put into the

ON state, and normal operation resumes. The BAL pin is

in its high impedance state if the part is in the OFF state

or when the part is in shutdown.

With the MODE pin set to 1, the LTC3305 will operate in the

CONTINUOUS Mode. The part functions in much the same

way as in the TIMER mode with the following differences.

1. There are no ON or OFF states. The balancing operation

continues even if the stack is in balance. The balanc-

ing operation is terminated only if the part is put into

shutdown. The BAL pin is always pulled low.

2. In CONTINUOUS mode, the top switches are turned

on and balancing operation on a battery is terminated

by the tBAT time out. Since the auxiliary cell remains

connected to the battery until a tBAT time out, its volt-

age can change before it connects to the next battery

in the stack. As a result, when the stack is balanced

and the DONE pin is pulled low, the voltages across

individual batteries in the stack may differ by more than

the programmed VTERMINATE. In the worst case, when

the capacity of the auxiliary cell is much smaller than

the battery, the individual battery voltages will differ by

twice the programmed VTERMINATE when balanced.

The LTC3305 provides undervoltage and overvoltage

threshold detection that can be programmed using

resistors that are connected between the ISET, VL and

VH pins and ground. The voltages set on VL and VH are

scaled by a factor of 10, setting the battery undervoltage

and overvoltage thresholds, respectively.

When an undervoltage or overvoltage fault condition is

detected, the corresponding UVFLT or OVFLT pin is pulled

low. The balancing operation is not interrupted during this

time. If the fault condition goes away during balancing, the

correspondingfault pinisput intoits highimpedancestate.

A number of components are included on the DC2043B

to protect the circuit from damage when hot-plugging the

battery connections to the board.

Clamping diode D100 prevents the BOOST pin on the

LTC3305 from going excessively negative with respect

to the V4 pin during hot plug. Likewise, D101 prevents

the voltage at the CP pin from going excessively negative

with respect to the CP pin.

Antiparallel Schottky diodes and a 100Ω resistor tie each

power connection with its corresponding sense (Kelvin)

connection. The resistor keeps the potential between the

power and sense connections near zero while the diodes

maintain the voltage difference to a few tenths of a volt

even when transient currents want to flow between power

and sense connections.

dc2043bfa

DEMO MANUAL DC2043B

QuicK start proceDure

Using short twisted pair leads for any power connections,

with all loads and power supplies off, refer to Figure 5 for

the proper measurement and equipment setup.

Follow the procedure below:

1. Before connectingPS1-PS5tothe DC2043B, thepower

supplies must have its current limit set to 5A . For

most power supplies with a current-limit-adjustment

feature the procedure to set the current limit is as

follows. Turn the voltage and current adjustment to

minimum. Short the output terminals and turn the

voltage adjustment to maximum. Adjust the current

limit to 5A for PS1. Turn the voltage adjustment to

minimum and remove the short between the output

terminals. Repeat for PS2-PS5 The power supplies

are now current limited to 5A .

a. Initial Jumper and PS settings:

JP1(MODE) = CONT JP2 (EN) = SD

JP3(TERM1) = 1 JP4 (TERM2) = 1

PS1 = Off PS2 = Off PS3 = OFF

PS4 = Off PS5 = Off PS6 = Off

2. Connect power supplies, load resistors and me-

ters as shown in Figure 5. Turn on PS1 and slowly

increase voltage to 2.0V while monitoring the input

current. If the current remains less than 200mA,

increase PS1 to 12.0V. Repeat for PS2-PS4.

3. Turn on PS5 and slowly increase voltage to 2.0V while

monitoring the inputcurrent. If thecurrent remains less

than 200mA, increase PS5 to 11.8V. Turn on PS6 and

slowly increase voltage to 2.0V while monitoring the

input current. If the current remains less than 20mA,

increase PS6 to 5.0V.

4. Measure the voltage from the VREG turret to ground.

The voltage should read approximately 2.6V. Measure

the voltage from the BOOST test point to V4. The volt-

age should read approximately 0V. No LED should be

on.

5. Set JP2 to EN. Measure the voltage from the BOOST

testpoint toV4. The voltage should read approximately

8.5V.

6. Measure the voltage from the ISET test point to ground.

The voltage should read approximately 1.2V.

During some hot-plug events, the gate-to-source voltage

on some of the power FETs can approach the maximum

VGS rating of the FETs. Back-to-back Zener diodes (15V

nominal threshold) are included across all power-FET

gate-source pins.

Inrush current between the sense connections and capaci-

torsC6, C12–C15islimited byresistorsR107–R111. These

resistors are pulse-power-rated. The higher pulse-power

capability is a necessary requirement for these resistors.

These resistors are 5Ω, 1206 except for the resistor in

the BAT4_KF net which is 2Ω, 1206 because, while it

senses the voltage at the top of the battery stack, it also

sinks a small amount of current to power the internals of

the LTC3305.

TVS diodes D135 to D138 are listed as “OPT”on the sche-

matic, and are not included on the DC2043B. However, a

transient-voltage-suppressor diode is included across

the battery stack to protect the LTC3305 from transients

generated during hot plugging. The threshold voltage of

the part is specified to lie between 66.7V and 73.7V.

Fuses are present on each of the 14 connections to external

batteries. Seven power connections employ a 7A-rated

fuse. The sense connections (XXX_K) use 1A fuses. Note

that the protection circuits described above are placed on

the internal-to-the-board side of the fuses. This placement

ensures isolation and disconnection of the protection

circuits in the event of a steady-state fault condition.

operatinG principLe

dc2043bfa

DEMO MANUAL DC2043B

QuicK start proceDure

7. Measure the voltage from the VH test point to ground.

The voltage should read approximately 1.52V.

8. Measure the voltage from the VL test point to ground.

The voltage should read approximately 0.95V.

9. With JP1 set to CONT, JP2 set to EN, JP3 set to 1 and

JP4 set to 1, observe that the BATX and BATY LEDs

are cycling through their four states.

BATX

LED

BATY

LED

Active

Battery

OFF OFF BAT1

OFF ON BAT2

ON ON BAT3

ON OFF BAT4

10. Decrease PS1 and PS5 to 9.4V and observe that while

the BATX and BATY are off, the UVFLT LED is on.

11. Increase PS1 and PS5 to 15.9V and observe that

while the BATX and BATY are off, the OVFLT LED is

on. Decrease PS1 and PS2 to 12.0V.

12. Decrease PS2 to 11.5V. Set JP1 to TIMER. Observe

that the BATX LED is off and BATY LED is on the ma-

jority of the time. Increase PS2 to 12V and observe

that the balancing action stops. The BAL LED will be

off and the DONE LED will be on.

13. Set JP1 to CONT and JP2 to SD. Set PS5 to 11.8V.

Observe that balancing action has stopped and no

LEDs are on. Set JP2 to EN and observe that balancing

action starts.

14. Turn off all power supplies.

10Ω

25W

PS5

PS4

PS3

PS2

PS1

10Ω

25W

10Ω

25W

10Ω

25W

5Ω

50W

PS6

Figure 5. Proper Measurement Equipment Set-Up

dc2043bfa

DEMO MANUAL DC2043B

parts List

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 5 C1-C4, C11 CAP., 4.7µF, X7R, 25V, 10%, 0805 MURATA, GRM21BR71E475KA73L

2 7 C5, C6, C12-C16 CAP., 10µF, X7R, 25V, 20%, 1206 TDK, C3216X7R1E106M160AB

3 1 C7 CAP., 0.033µF, C0G, 50V, 5%, 0805, AUTOMOTIVE TDK, CGA4J2C0G1H333J125AA

4 2 C8, C9 CAP., 0.01µF, C0G, 50V, 5%, 0805, AUTOMOTIVE TDK, CGA4C2C0G1H103J060AA

5 1 C17 CAP., 1µF, X7R, 16V, 10%, 0603 KEMET, C0603C105K4RAC7867

6 2 D1, D2 DIODE, SCHOTTKY, 100V, 1A, SOD-123F CENTRAL SEMI, CMMSH1-100G TR LEAD FREE

7 3 D3, D6, D7 LED, RED, CLEAR, 0603 SMD LITE-ON TECHNOLOGY CORP, LTST-C193KRKT-5A

8 4 D4, D5, D8, D9 LED, GREEN, CLEAR, 0603 SMD LITE-ON TECHNOLOGY CORP, LTST-C193KGKT-5A

9 16 D100-D115 DIODE, SCHOTTKY, 20V, 1A, SOD-123F CENTRAL SEMI, CMMSH1-20G TR LEAD FREE

10 18 D116-D133 DIODE, ZENER, 15V, 250mW, SOD-323 CENTRAL SEMI, CMDZ5245B TR LEAD FREE

11 1 D134 DIODE, TVS, 60V, 400W, SMA DIODES INC., SMAJ60A-13-F

12 7 F1, F3, F5, F7, F9, F11, F13 FUSE, BOARD MNT, 1A, 32VAC, 63VDC, 1206 Eaton, TR/3216FF1-R

13 7 F2, F4, F6, F8, F10, F12, F14 FUSE, BOARD MNT, 7A, 32VAC/VDC, 1206 Eaton, TR/3216FF7-R

14 1 Q1 XSTR., MOSFET, P-CH, 20V, 0.95A, SOT-23 CENTRAL SEMI, CMPDM8120 PBFREE

15 10 Q2-Q11 XSTR., MOSFET, N-CH, 100V, 60A, PPAK SO-8 VISHAY, SIR882DP-T1-GE3

16 8 R1, R2, R4-R9 RES., 6.04kΩ, 1%, 1/16W, 0402 VISHAY, CRCW04026K04FKED

17 1 R3 RES., 3.01kΩ, 1%, 1/16W, 0402 VISHAY, CRCW04023K01FKED

18 2 R10, R11 RES., 12.1kΩ, 1%, 1/8W, 0805 VISHAY, CRCW080512K1FKEA

19 7 R12-R18 RES., 10Ω, 1%, 1/16W, 0402 VISHAY, CRCW040210R0FKED

20 2 R19, R34 RES., 665Ω, 1%, 1/2W, 1210 VISHAY, CRCW1210665RFKEA

21 1 R20 RES., 12.1kΩ, 1%, 1/16W, 0402 VISHAY, CRCW040212K1FKED

22 1 R21 RES., 46.4kΩ, 1%, 1/16W, 0402 VISHAY, CRCW040246K4FKED

23 1 R22 RES., 28.7kΩ, 1%, 1/16W, 0402 VISHAY, CRCW040228K7FKED

24 7 R23-R29 RES., 1kΩ, 1%, 1/16W, 0402 NIC, NRC04F1001TRF

25 4 R30-R33 RES., 1.82MΩ, 1%, 1/16W, 0402 NIC, NRC04F1824TRF

26 1 R35 RES., 249Ω, 1%, 1/4W, 1206 VISHAY, CRCW1206249RFKEA

27 1 R36 RES., 100kΩ, 1%, 1/16W, 0402 NIC, NRC04F1003TRF

28 7 R37-R43 RES., 2kΩ, 1%, 1/16W, 0402 NIC, NRC04F2001TRF

29 7 R100-R106 RES., 100Ω, 1%, 1/16W, 0402 KOA SPEER, RK73H1ETTP1000F

30 4 R107-R110 RES., PULSE PROOF, 4.99Ω, 1%, 1/2W, 1206 VISHAY, CRCW12064R99FKEAHP

31 1 R111 RES., PULSE PROOF, 2Ω, 1%, 1/2W, 1206 VISHAY, CRCW12062R00FKEAHP

32 1 RT1 RES., THERMISTOR PTC, AUTOMOTIVE, 0.15Ω,

20%, 2.3W, THT

MURATA, PTGLESARR15M1B51B0

33 1 U1 IC, LEAD-ACID BATTERY BALANCER, TSSOP-38 LINEAR TECHNOLOGY, LTC3305EFE#PBF

dc2043bfa

DEMO MANUAL DC2043B

parts List

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Optional Circuit Components

1 0 D135-D138 TVS DIODE 15VWM 24.4VC SMA DIODES INCORPORATED, SMAJ15A-13-F

Hardware: For Demo Board Only

1 7 E1-E7 TEST POINT, TURRET, 0.064" MTG. HOLE, 0.125"

THICK PCB

MILL-MAX, 2308-4-00-80-00-00-07-0

2 17 E8-E24 TEST POINT, TURRET, 0.094", MTG. HOLE MILL-MAX, 2501-2-00-80-00-00-07-0

3 4 JP1-JP4 CONN., HDR., MALE, 1x3, 2mm, THT, STR WURTH ELEKTRONIK, 62000311121

4 2 LB1 LABEL SPEC, DEMO BOARD SERIAL NUMBER BRADY, THT-96-717-10

5 4 MP1-MP4 STANDOFF, NYLON, SNAP-ON, 0.250" KEYSTONE, 8831

6 1 PCB1 PCB, DC2043B EAGLE ELECTRONICS, INC, 600-DC2043B

7 4 XJP1-XJP4 CONN., SHUNT, FEMALE, 2 POS, 2mm WURTH ELEKTRONIK, 60800213421

dc2043bfa

DEMO MANUAL DC2043B

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-

tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.

schematic DiaGram

TERM1

TERM2 EN MODE

00SD TIMER

11EN CONT.

BOOST

BATX

BATY OVFLT

UVFLT

BAL

DONE

PTCFLT

3.3V - 5.5V

VEXT

VEXT_RTN

CTOFF

CTON

CTBAT

ISET

2.5V

VREG

OFF

TERM1 TERM2

± 12.5mV

± 25mV

±50mV

TERMINATION

VOLTAGE

± 100mV

BATTERY BEING

BALANCED

BATTERY 1

BATTERY 2

BATTERY 3

BATTERY 4

OFF

BATX

LED

BATY

LED

NOTES: UNLESS OTHERWISE SPECIFIED

1. ALL RESISTORS ARE IN OHMS, 0402, 1%, 1/16W.

3. INSTALL SHUNTS ON JUMPERS AS SHOWN.

2. ALL CAPACITORS ARE IN MICROFARADS, 0805, 20%, 25V.

BATY BATX PTCFLT DONE BAL UVFLT OVFLT

0805

REVISION HISTORY

ECO REV DESCRIPTION APPROVED DATE

-1 PROTOTYPE

BAT4_KF

BAT2_KF

BAT1_KF

GND_KF

NG9

NG8

NG7

NG6

NG5

NG4

NG3

NG2

NG1

AUXN_KF AUXP_KF

BAT4F

BAT3_KF

GND_KF DATE:

IC NO.

SHEET OF

TITLE: DEMO CIRCUIT SCHEMATIC,

APPROVALS

PCB DES.

APP ENG.

Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

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.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE

www.linear.com

SIZE:

SKU NO. SCHEMATIC NO. AND REVISION:

PCA BOM:

PCA ASS'Y:

N/A

LTC3305-FE LEAD ACID BATTERY BALANCER

DC2043B

700-DC2043B_REV01

710-DC2043B_REV01

705-DC2043B_REV01

Thursday, November 17, 2016

DATE:

IC NO.

SHEET OF

TITLE: DEMO CIRCUIT SCHEMATIC,

APPROVALS

PCB DES.

APP ENG.

Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

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.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE

www.linear.com

SIZE:

SKU NO. SCHEMATIC NO. AND REVISION:

PCA BOM:

PCA ASS'Y:

N/A

LTC3305-FE LEAD ACID BATTERY BALANCER

DC2043B

700-DC2043B_REV01

710-DC2043B_REV01

705-DC2043B_REV01

Thursday, November 17, 2016

DATE:

IC NO.

SHEET OF

TITLE: DEMO CIRCUIT SCHEMATIC,

APPROVALS

PCB DES.

APP ENG.

Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

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.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE

www.linear.com

SIZE:

SKU NO. SCHEMATIC NO. AND REVISION:

PCA BOM:

PCA ASS'Y:

N/A

LTC3305-FE LEAD ACID BATTERY BALANCER

DC2043B

700-DC2043B_REV01

710-DC2043B_REV01

705-DC2043B_REV01

Thursday, November 17, 2016

TP4

R33

1.82M

E15

LTC3305-FE

MODE

BOOST

AUXP

AUXN

NG1

NG2

NG3

NG4

NG5

NG6

NG7

NG8

NG9

BATX

BATY

OVFLT

UVFLT

BAL

DONE

PTCFLT

CTBAT

CTON

CTOFF

ISET

VREG

TERM2

TERM1

EN2

EN1

GND

R41

C12

10uF

1206

E16

R42

RED

GREEN

R36

100k

C13

10uF

1206

CMMSH1-100G

TP3

D101

CMMSH1-20G TR

R35

249

1206

TP18

10uF

1206

CMMSH1-100G

R19

665

1210

TP14

R26

C14

10uF

1206

TP17

TP15

R20

12.1k

0.01uF 5%

50V

0805

TP2

C11

4.7uF

R34

665

1210

R37

10uF

1206

JP4

R28

C17

1uF

0603

16V

D100

CMMSH1-20G TR

C15

10uF

1206

R25

R29

RED

R30

1.82M

R38

0.033uF

50V

TP1

JP1

C16

10uF

1206

CMPDM8120

R22

28.7k

R24

R39

GREEN

TP16

R31

1.82M

0.01uF 5%

50V

0805

GREEN

JP2

R21

46.4k

R40

R43

GREEN

R27

R32

1.82M

E17

R23

RED

JP3

VREG

GND_KF

BAL

VEXT

GND_KF

dc2043bfa

DEMO MANUAL DC2043B

schematic DiaGram

9.5V-15.5V

9.5V-15.5V9.5V-15.5V

9.5V-15.5V

AUXP_K

AUXN

BAT4

BAT4_K

BAT3

BAT3_K

BAT2

BAT2_K

BAT1

BAT1_K

GND

GND_K

AUXP

AUXN_K

PCA ADDITIONAL PARTS

0805

NG7

NG5

NG4

NG3

NG2

NG1

NG9

NG8

NG6

1206

15V

1. ALL RESISTORS ARE IN OHMS, 0402, 1%, 1/16W.

3. INSTALL SHUNTS ON JUMPERS AS SHOWN.

NOTES: UNLESS OTHERWISE SPECIFIED

2. ALL CAPACITORS ARE IN MICROFARADS, 0805, 20%, 25V.

AUXN_KF

NG9

NG8

NG7

NG6

NG5

NG4

NG3

NG2

NG1

GND_KF

BAT1_KF

BAT2_KF

BAT3_KF

BAT4_KF

BAT4F

AUXP_KF

DATE:

IC NO.

SHEET OF

TITLE: DEMO CIRCUIT SCHEMATIC,

APPROVALS

PCB DES.

APP ENG.

Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

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.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE

www.linear.com

SIZE:

SKU NO. SCHEMATIC NO. AND REVISION:

PCA BOM:

PCA ASS'Y:

N/A

LTC3305-FE LEAD ACID BATTERY BALANCER

DC2043B

700-DC2043B_REV01

710-DC2043B_REV01

705-DC2043B_REV01

Thursday, November 17, 2016

DATE:

IC NO.

SHEET OF

TITLE: DEMO CIRCUIT SCHEMATIC,

APPROVALS

PCB DES.

APP ENG.

Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

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.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE

www.linear.com

SIZE:

SKU NO. SCHEMATIC NO. AND REVISION:

PCA BOM:

PCA ASS'Y:

N/A

LTC3305-FE LEAD ACID BATTERY BALANCER

DC2043B

700-DC2043B_REV01

710-DC2043B_REV01

705-DC2043B_REV01

Thursday, November 17, 2016

DATE:

IC NO.

SHEET OF

TITLE: DEMO CIRCUIT SCHEMATIC,

APPROVALS

PCB DES.

APP ENG.

Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

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.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE

www.linear.com

SIZE:

SKU NO. SCHEMATIC NO. AND REVISION:

PCA BOM:

PCA ASS'Y:

N/A

LTC3305-FE LEAD ACID BATTERY BALANCER

DC2043B

700-DC2043B_REV01

710-DC2043B_REV01

705-DC2043B_REV01

Thursday, November 17, 2016

4.7uF

D133

CMDZ5245B

R109 4.99

6.04k

D130

CMDZ5245B

TP6

D108

CMMSH1-20G TR

R106

100

6.04k

D132

CMDZ5245B

D109

CMMSH1-20G TR

R13

TP5

D131

CMDZ5245B

SIR882DP-T1-GE3

D102

CMMSH1-20G TR

Q11

SIR882DP-T1-GE3

D127

CMDZ5245B

D111

CMMSH1-20G TR

E22

E12

MP2 STANDOFF,NYLON, SNAP-ON, 0.250"

TP8

R103

100

TP9

Q10

SIR882DP-T1-GE3

D103

CMMSH1-20G TR

D106

CMMSH1-20G TR

MP1 STANDOFF,NYLON, SNAP-ON, 0.250"

E13

R105

100

D134

SMAJ60A

60V

R15

R100

100

D107

CMMSH1-20G TR

D135

OPT

F10

SIR882DP-T1-GE3

MP3 STANDOFF,NYLON, SNAP-ON, 0.250"

TP12

4.7uF

R10 12.1k

0805

6.04k

D110

CMMSH1-20G TR

R102

100

D137

OPT

F12

MP4 STANDOFF,NYLON, SNAP-ON, 0.250"

E14

D128

CMDZ5245B

D136

OPT

F11

D123

CMDZ5245B

E19

E18

4.7uF

D126

CMDZ5245B

TP7

4.7uF

D113

CMMSH1-20G TR

D104

CMMSH1-20G TR

R108 4.99

R107 4.99

E23

D118

CMDZ5245B

SIR882DP-T1-GE3

F13

6.04k

3.01k

SIR882DP-T1-GE3

D138

OPT

F14

R14

TP11

D105

CMMSH1-20G TR

R110 4.99

R17

D119

CMDZ5245B

SIR882DP-T1-GE3

R18

D121

CMDZ5245B

D112

CMMSH1-20G TR

R12

D120

CMDZ5245B

SIR882DP-T1-GE3

TP10

RT1

0.15

6.04k

R111 2

R101

100

D129

CMDZ5245B

D122

CMDZ5245B

R11 12.1k

0805

E10

D115

CMMSH1-20G TR

TP13

D116

CMDZ5245B

R16

D124

CMDZ5245B

SIR882DP-T1-GE3

D114

CMMSH1-20G TR

6.04k

PCB1 PCB, DC2043B REV01

D117

CMDZ5245B

D125

CMDZ5245B

E11

LB1 LABEL

6.04k

R104

100

E24

E21

SIR882DP-T1-GE3

E20

IB1

IB2

IB1

IB2

dc2043bfa

DEMO MANUAL DC2043B

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ●FAX: (408) 434-0507 ●www.linear.com

 LINEAR TECHNOLOGY CORPORATION 2014

LT 1216 REV A • PRINTED IN USA

DEMONSTRATION BOARD IMPORTANT NOTICE

Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:

This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT

OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete

in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety

measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union

directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.

If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date

of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU

OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS

FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR

ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims

arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all

appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or

agency certified (FCC, UL, CE, etc.).

No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance,

customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.

LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.

Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and

observe good laboratory practice standards. Common sense is encouraged.

This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC applica-

tion engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

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