Linear Technology LTC3305EFE Guida rapida alla configurazione

dc2043af

DEMO MANUAL DC2043A

Description

LTC3305EFE

Lead Acid Battery Balancer

Demonstration circuit2043Ais alead AcidBatteryBalancer

featuring the LT C

3305. The LTC3305 balances up to 4

lead acid batteries connected in series and incorporates all

voltage monitoring, gate drive and fault detection circuitry.

The LTC3305 employs an auxiliary battery or an alternative

storage cell to transfer charge to or from 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/DC2043A

Figure 1. DC2043A Demo Board Figure 2. Thermal Image of DC2043A

dc2043af

DEMO MANUAL DC2043A

operatinG principLe

Refer to the block diagram within the LTC3305 data sheet

for its operating principle.

The LTC3305 balances batteries using an auxiliary cell

or an alternate storage cell as a charge reservoir. The

LTC3305 controls external N Channel MOSFET switches

in a preprogrammed sequence to connect a battery in the

stack to an auxiliary cell. Charge is transferred to or from

the auxiliary cell when it is connected to a battery.

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 cell connected to the negative terminal of BAT1,

the lowest battery in the stack. The bottom switches that

connect the negative terminals of BAT1 to the Auxiliary

cell’s negative terminal are turned on. After a 50ms delay,

the voltages across the auxiliary cell and BAT1 are com-

pared by the termination sense comparator. If the voltage

difference between the auxiliary cell and BAT1 is less than

the selected termination voltage, the battery is deemed to

be in a balance state with respect to the auxiliary cell. The

bottom switches will be turned off and the next battery

within the stack will be connected.

If the voltage difference between the auxiliary cell and

BAT1 is greater than the selected termination voltage, the

top switches that connect the positive terminal of BAT1

to the auxiliary cell’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 cell and the battery. The battery will remain

connected to the auxiliary cell until the voltage difference

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 cell

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

fore make function before the next battery is connect-ed.

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

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

dc2043af

DEMO MANUAL DC2043A

operatinG principLe

100mA/DIV

BAT CURRENT

BATTERY BALANCING CURRENT

0.25V DIFFERENTIAL BETWEEN

BATTERY AND AUX BATTERY

dc2043a F03

100mA/DIV

BAT CURRENT

BATTERY BALANCING CURRENT

0.25V DIFFERENTIAL BETWEEN

BATTERY AND AUX BATTERY

dc2043a F04

Figure 3. Start-Up Battery Balancing Current

Figure 4. Steady State Battery Balancing Current

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

balanced when for a four battery stack, the termination

sense comparator detects VTERMINATE on five consecutive

cycles that connects each of the batteries to the auxiliary

cell using the bottom switches only.

In TIMER mode, the balancing operation continues for a

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

LTC3305 is put into alow 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

corresponding faultpin isput intoitshigh impedancestate.

dc2043af

DEMO MANUAL DC2043A

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 connecting PS1-PS5 to the DC2043A, the

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

For most power supplies with a current limit adjust-

ment feature the procedure to set the current limit is

as follows. Turn the voltage and current adjustment

to minimum. Short the outputs 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 meters 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

monitoringthe inputcurrent. Ifthe currentremains 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. Thevoltage shouldread approximately

8.5V.

6. Measurethe voltagefromthe ISET Test Pointto ground.

The voltage should read approximately 1.2V.

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 PS1and 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

dc2043af

DEMO MANUAL DC2043A

QuicK start proceDure

10Ω

25W

PS5

PS4

PS3

PS2

PS1

10Ω

25W

10Ω

25W

10Ω

25W

5Ω

50W

PS6

Figure 5. Proper Measurement Equipment Set-Up

dc2043af

DEMO MANUAL DC2043A

parts List

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 4 C1-C4 CAP.,X7R, 4.7µF, 25V, 20%, 0805 TDK, C2012X7R1E475M

2 7 C5, C6, C12-C16 CAP.,X7R, 10µF, 25V, 20%, 1206 MURATA, GRM31CR71E106KA12

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

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

5 1 C10 CAP., X7R, 1.0µF, 16V, 10%, 0603 MURATA, GRM188R71C105KA12D

6 2 D1-D2 SMD, SCHOTTKY DIODE, 1A, 100V, SOD123 CENTRAL SEMI, CMMSH1-100G

7 10 Q1-Q3_1, Q3_2, Q4-Q9 MOSFET, 100V, 0.009Ω, 60A,POWERPAK-SO-8 VISHAY, SiR882DP

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

9 1 R3 RES, CHIP, 3.01k, 1/16W, 1%, 0402 VISHAY, CRCW04023K01FKED

10 2 R10, R11 RES, CHIP,12.1k, 1/8W, 1%, 0805 VISHAY, CRCW080512K1FKED

11 7 R12-R18 RES, CHIP, 10.0, 1/16W, 1%, 0402 VISHAY, CRCW040210R0FKED

12 2 R19, R34 RES, CHIP, 665, 1/2W, 1%, 1210 VISHAY, CRCW1210665RFKED

13 1 R20 RES, CHIP, 12.1k, 1/16W, 1%, 0402 VISHAY, CRCW040212K1FKED

14 1 R21 RES, CHIP, 46.4k, 1/16W, 1%, 0402 VISHAY, CRCW040246K4FKED

15 1 R22 RES, CHIP, 28.7k, 1/16W, 1%, 0402 VISHAY, CRCW040228K7FKED

16 4 R30-R33 RES, CHIP, 1.82M, 1/16W, 1%, 0402 VISHAY, CRCW04021M82FKED

17 1 R35 RES, CHIP, 249, 1/4W, 1%, 1206 VISHAY, CRCW1206249RFKED

18 1 RT1 DISC, TH, PTC, 0.15Ω, 16V, 10.1mm DIA, MURATA, PTGLESARR15M1B51B0

19 1 U1 IC,SMT, LEAD ACID BATTERY BALANCER/EFE LINEAR, LTC3305EFE#PBF

Additional Demo Board Circuit Components

1 1 C11 CAP., X7R, 4.7µF, 25V, 20%, 0805 TDK, C2012X7R1E475M

2 3 D3, D6, D7 SMD, RED LED, 0603 LITE ON, LTST-C193KRKT-5A

3 4 D4, D5, D8, D9 SMD, GREEN LED, 0603 LITE ON, LTST-C193KGKT-5A

4 4 F1-F4 SMD, FUSE, 7A, FAST ACTING, 1206 32VDC BUSSMANN, 3216FF7-R

5 6 F5-F10 SMD, FUSE, 1/4A, FAST ACTING, 1206 32VDC BUSSMANN, 3216FF250-R

6 1 Q10 MOSFET, P-CHANNEL, 20V, 0.085Ω, 0.95ASOT-23 CENTRAL SEMI, CMPDM8120

7 7 R23-R29 RES, CHIP, 1.00k, 1/16W, 1%, 0402 VISHAY, CRCW04021K00FKED

8 1 R36 RES, CHIP, 100k, 1/16W, 1%, 0402 VISHAY, CRCW0402100KFKED

9 7 R37-R43 RES, CHIP, 2.00k, 1/16W, 1%, 0402 VISHAY, CRCW04022K00FKED

Hardware: For Demo Board Only

1 7 E1-E7 Turret, 0.061" MILL-MAX, 2308-2-00-80-00-00-07-0

2 17 E8-E24 Turret, 0.09" MILL-MAX, 2501-2-00-80-00-00-07-0

3 4 JP1-JP4 HEADER, 3PINS, 2mm SAMTEC, TMM-103-02-L-S

4 4 JP1-JP4 SHUNT 2mm SAMTEC, 2SN-BK-G

5 6 STAND-OFF, NYLON 0.375" tall KEYSTONE, 8832 (SNAP ON)

dc2043af

DEMO MANUAL DC2043A

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

TERM1TERM2 EN MODE

00 SD TIMER

11EN CONT.

DONE BAL UVFLT OVFLT

BATY BATX

PTCFLT

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.

3.3V - 5.5V

9.5V-15.5V

2.5V

OFF

1 1

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

BAT3_K

BAT4_K

NG5

NG4

NG3

NG2

NG6

NG7

NG1

NG9

NG8

NG1

NG2

NG3

NG4

NG5

NG6

NG7

NG8

NG9

BAT4

VREG

BAT3

PTCFLTB

DONEB

BALB

UVFLTB

OVFLTB

BATY

BATX

PTCFLTB DONEB BALB UVFLTB OVFLTB BATY BATX

BAT2_K

GND

BALB

GND_K

BAT1

GND_K

AUXP_K

AUXN_K

BAT1_K

GND_K

BAT2

BAT1_K

BAT2_K

BAT3_K

BAT4_K

SIZE

DATE:

.VER.ONCI

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY 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

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

DEMO CIRCUIT 2043A

1 1

LEAD ACID BATTERY BALANCER

N/A

LTC3305EFE

9 - 23 - 14

SIZE

DATE:

.VER.ONCI

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY 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

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

DEMO CIRCUIT 2043A

1 1

LEAD ACID BATTERY BALANCER

N/A

LTC3305EFE

9 - 23 - 14

SIZE

DATE:

.VER.ONCI

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY 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

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

DEMO CIRCUIT 2043A

1 1

LEAD ACID BATTERY BALANCER

N/A

LTC3305EFE

9 - 23 - 14

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

JDPRODUCTION FAB 41-32-93-

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

JDPRODUCTION FAB 41-32-93-

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

JDPRODUCTION FAB 41-32-93-

D2 CMMSH1-100GD2 CMMSH1-100G

E20

BAT2_K

E20

BAT2_K

TP12

NG9

TP12

NG9

R25 1kR25 1k

JP1JP1

SiR882DP

R42

R9 6.04kR9 6.04k

E24

AUXN_K

E24

AUXN_K

OVFLT

RED

LED-LN

RED

LED-LN

R4 6.04KR4 6.04K

R31

1.82M

R31

1.82M

SiR882DP

E22

GND_K

E22

GND_K

R34 665

1210

R34 665

1210

10nF

50V

10nF

50V

C10

1uF

16V

0603

10%

C10

1uF

16V

0603

10%

R21

46.4k

R21

46.4k

R14 10R14 10

E10

BAT4

E10

BAT4

TP8

NG5

TP8

NG5

4.7uF

TP4

CTOFF

TP4

CTOFF

TP16

ISET

TP16

ISET

6.04k

JP3JP3

RED

LED-LN

RED

LED-LN

6.04K

SiR882DP

BATY

SiR882DP

10uF

1206

10uF

1206

TP3

CTON

TP3

CTON

4.7uF

R26 1kR26 1k

JP2JP2

Q3_2

SiR882DP

Q3_2

SiR882DP

R43

GRN

LED-LN

GRN

LED-LN

R32

1.82M

R32

1.82M

1206

1/4A

1206

1/4A

1206

SiR882DP

33nF

50V

33nF

50V

GRN

LED-LN

GRN

LED-LN

C14

10uF

1206

C14

10uF

1206

R39

R5 6.04kR5 6.04k

R22

28.7k

R22

28.7k

TP18

TP2

CTBAT

TP2

CTBAT

TP9

NG6

TP9

NG6

BATX

SiR882DP

E19

BAT3_K

E19

BAT3_K

R17

R12 10R12 10

E14

GND

E14

GND

DONE

AUXP

4.7uF

10uF

1206

10uF

1206

Q3_1

SiR882DP

Q3_1

SiR882DP

R19 665

1210

R19 665

1210

R27 1kR27 1k

1/4A

1206

1/4A

1206

R37

Q10

CMPDM8120

Q10

CMPDM8120

R15

TP5

NG1

TP5

NG1

R10 12.1k

0805

R10 12.1k

0805

1206

LTC3305EFE

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

GRN

LED-LN

GRN

LED-LN

TP17CP TP17CP

E17

VREG

E17

VREG

R40

TP14

GRN

LED-LN

GRN

LED-LN

TP10

NG7

TP10

NG7

CMMSH1-100G

BAL

E13

BAT1

E13

BAT1

R23 1kR23 1k

AUXN

R8 6.04KR8 6.04K

R3 3.01KR3 3.01K

1/4A

1206

1/4A

1206

RT1

PTGLESARR15M1B51B0

RT1

PTGLESARR15M1B51B0

R28 1kR28 1k

C13

10uF

1206

C13

10uF

1206

E23

AUXP_K

E23

AUXP_K

1/4A

1206

1/4A

1206

E21

BAT1_K

E21

BAT1_K

R33

1.82M

R33

1.82M

TP1

BOOST

TP1

BOOST

UVFLT

TP6

NG2

TP6

NG2

6.04k

6.04K

TP13

NG3

TP13

NG3

E12

BAT2

E12

BAT2

JP4JP4 E18

BAT4_K

E18

BAT4_K

E15

VEXT

E15

VEXT

TP11

NG8

TP11

NG8

RED

LED-LN

RED

LED-LN

R41

1206

R35 249

1206

R35 249

1206

R24 1kR24 1k

F10

1/4A

1206

F10

1/4A

1206

R18

R36

100k

R36

100k

R13 10R13 10

R38

R30

1.82M

R30

1.82M

TP15

C15

10uF

1206

C15

10uF

1206

4.7uF

10nF

50V

10nF

50V

C16

10uF

1206

C16

10uF

1206

C12

10uF

1206

C12

10uF

1206

R29 1kR29 1k

PTCFLT

R20

12.1k

R20

12.1k

C11

4.7uF

C11

4.7uF

TP7

NG4

TP7

NG4

1206

1/4A

1206

1/4A

1206

E11

BAT3

E11

BAT3

R16

R11 12.1k

0805

R11 12.1k

0805

E16

VEXT_RTN

E16

VEXT_RTN

SiR882DP

dc2043af

DEMO MANUAL DC2043A

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 1214 • PRINTED IN USA

DEMONSTRATION BOARD IMPORTANT NOTICE

Linear Technology Corporation (LT C ) 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 LT C 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 LT C 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. LT C assumes no liability for applications assistance,

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

LT C 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 LT C applica-

tion engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

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