ltc4000egn battery charger controller and powerpath

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DEMO MANUAL DC1830B-A/DC1830B-B

DESCRIPTION

LTC4000EGNBattery Charger Controller and

PowerPath Manager

Demonstration circuit 1830B is a battery charger control-ler and PowerPath™ manager featuring the LTC®4000. This board should be connected to a front end DC/DC power supply for a complete charger solution.

The DC1830B is customizable to handle a wide variety of applications with output voltages from 3V to 30V and out-put currents up to 6.5A with the PFETs supplied, and up to 60V and/or 13A with higher voltage rating and/or added PFETs. The reference design provided with DC1830A is targeted at 4-cell LiFePO4 (14.6V/5A) applications.

The DC1830B loop compensation values were proven with the LTC3845A buck-boost power converter shown and are typical for other applications. The output of this demo board was specifically tailored for a Tenergy 10A-hour battery, P/N 30207. Other voltages can be set by changing ROFB2 and RBFB2. The desired nominal volt-age can be accurately trimmed by using trim resistors ROFBX and RBFBX. For example, for 14.4V battery float voltage, change ROFB2 and RBFB2 to 86.6k, and add 7.5M at ROFBX and RBFBX for greater set point accuracy. Other parameters can be adjusted to suit specific applications with guidance provided in the LTC4000 data sheet. Table 2 provides a summary of parameter adjustments.

This circuit was designed to demonstrate the high levels of performance and small solution size attainable using

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and PowerPath is a trademark of Analog Devices, Inc. All other trademarks are the property of their respective owners.

PERFORMANCE SUMMARY

this part to control a switch mode power converter to form a battery charger, intelligent PowerPath manager, and power supply system. It produces a regulated 5A/14.6V battery charger output as well as a system output of up to 5.5A: suitable for a wide variety of portable applications including instruments, industrial equipment, power tools, and computers.

The DC1830B-A provides a solution complete with both battery charger control and PowerPath management. It includes a second PFET (Q2) between VOUT-SYS and BAT to provide instant-on functionality which keeps VOUT-SYS within a narrow range regardless of battery voltage, and disconnects the battery when it is fully charged and power is available from the front end DC/DC converter. Thermal regulation circuitry is also provided to limit the temperature of both PFETs. The DC1830B-B provides a simple battery-charger-controller only solution without the PowerPath manager. It deletes the second PFET and thermal regulation circuitry. In this case, the battery is always online and VOUT-SYS tracks BAT voltage.

Design files for this circuit board are available at http://www.linear.com/demo/DC1830B-A

Specifications are at TA = 25°C

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITSVIN Input Supply Range This is the Input Voltage of the Front End DC/DC Supply 20 60 V

IIN Input Current Limit This is the Input Current Limit Set by the LTC4000 3 A

VFLOAT Battery Float Voltage 14.4 14.6 14.8 V

Output Regulation Line and Load (20V to 60V, 0A to 4.5A) ±0.005 %

IBAT Battery Charge Current 5 A

Battery Charge Current – Trickle 0.6 A

tT Charge Termination Time VBAT = VFLOAT 2.9 hours

VOUT-SYS System Output Voltage 12.3 14.6 15.5 V

IOUT-SYS System Output Current Range *Input Current Limited Below 35VIN 0 5.5* A

http://www.linear.com/LTC4000

http://www.linear.com/demo/DC1830B-A

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QUICK START PROCEDUREDemonstration circuit 1830 is offered for use in combina-tion with a front end DC/DC converter, and will need to be customized to suit the intended application. It has been supplied with components for a design as outlined in the performance summary, and tested in conjunction with the LTC3845A buck converter that it was tailored to. A sepa-rate demonstration board is available for the LTC4000/LTC3789 buck-boost combination, the DC1721A. The LTC4000 data sheet should be used for guidance in deter-mining circuit values for the application at hand. You may follow the design example on page 26 of the data sheet. Table 1 provides a summary of parameter adjustments.

NOTE: The PFETs supplied on this board are rated at 30V.

Once the circuit has been customized to suit the appli-cation at hand, it is easy to set up to evaluate the per-formance of the LTC4000 when combined with a suit-able switching power converter, such as the LTC3845A. voltages and currents cited in this procedure are for the design as delivered; if the design has been customized, substitute the appropriate values. Refer to Figure 1 for proper measurement equipment setup and follow the procedure below:

WARNING: BATTERIES ARE POTENTIALLY DANGEROUS HIGH ENERGY SOURCES. IMPROPER CONNECTION, OVERCHARGE, OR RAPID DISCHARGE COULD RESULT IN EXPLOSION AND/OR FIRE.

1. Set an input power supply that is capable of 60V and 3A, to 24V. Then turn off the supply.

2. With power off, connect the supply to the input ter-minals VIN and GND.

NOTE:

a. Input voltages lower than 20V can keep the con-verter from turning on due to the undervoltage lockout feature of the LTC4000.

b. If efficiency measurements are desired, refer to Figure 1 for the test setup.

3. Set CHARGE jumper to ENABLE.

4. Turn on the power at the input.

NOTE: Make sure that the input voltage never exceeds 60V.

5. Check for the proper BAT output voltage of 14.6V. Turn off the power at the input.

6. Now that the proper output voltage is established, connect a variable load capable of sinking 6A at 16V to the output terminals BAT and GND. Set the current for 0A.


NOTE: If there is no output, temporarily disconnect the load to make sure that the load is not set too high.

8. Once the proper BAT output voltage is again estab-lished, adjust the load and/or source within the oper-ating range and observe the battery float voltage regu-lation, charge current, and other desired parameters.

9. Set the load to constant voltage mode to more easily observe charge current and trickle charge current.

NOTE: The following applies to the DC1830B-A.

NOTE: Operation in the instant-on region (VOUT < 12.5V) may engage thermal limit circuit to protect Q2 in the linear region.

NOTE: The optional thermal limit circuit for Q1 (Q5, RNTC3, R8 to 12, and U2) is included to protect Q1 in case of an extended short-circuit on VOUT-SYS under adverse thermal conditions (TA > 40°C). It may not be needed in applications with less severe thermal condi-tions, lower current available to VOUT-SYS, or where continuous short-circuit protection on VOUT-SYS is not required.

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QUICK START PROCEDURE

Table 1. LTC4000 Charger Setup Parameters and Reference ValuesREFERENCE DESCRIPTION NOMINAL VALUE (V)* MIN/MAX CONDITIONS

IIL Input Current Regulation/Limit (50µA • RIL)/20 45/55 50mV max

ICL Charge Current Regulation/Limit (50µA • RCL)/20 45/55 50mV max

ICL Trickle Charge Current Regulation/Limit (5µA • RCL)/20 4.5/5.5

VBAT-FLOAT Battery Float Voltage 1.136V 1.125/1.147

VOUT System Voltage 1.193V 1.181/1.204 Charger Off

(Follows VBAT) Charger Float

(Follows VBAT) Charging at ICL, 0.86VBAT-FLOAT < VBAT < VBAT-FLOAT

0.86 • 1.136V 0.82/0.90 Instant-On, 0.68VBAT-FLOAT < VBAT < 0.86VBAT-FLOAT

0.86 • 1.136V 0.82/0.90 Instant-On, Trickle, VBAT < 0.68VBAT-FLOAT

VM Input Voltage Monitor/UVLO 1.193V 1.181/1.204 Falling, (40mV Hysteresis)

CX C/X Monitor/Charge Termination (5µA • RCX – 10mV)/20 4.5/5.5 Short TMR to BIAS for C/X Termination

TMR Charge Termination Timer 104S/nF 83/126

*Normalized to sense point

10. Turn off the power at the input.

11. Connect the output load and meters to the VOUT-SYS output.

12. Set CHARGE jumper to DISABLE.


14. Once the proper VOUT-SYS is again established, adjust the load and/or source within the operating range and observe the output voltage regulation, rip-ple voltage, efficiency, input and output current limit, and other desired parameters.

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Figure 1. Fixture Connections and Measurement Equipment Setup

–

+

+ –

+ –

–

+

DCSOURCE +

–LOAD

OR

+

–SCOPE

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5

5

4

4

3

3

2

2

1

1

D D

C C

B B

A A

10-36 VIN, STEP-UP/DOWN DC/DC CONVERTER

Rsense-input

LTC4000 SYSTEM CONTROL LOOPS

A5

A7

A6A4

Rsense-charge

DC - DC CONVERTER

VC / ITH

LTC4000 Gm

Gm

Gm

Gm

Battery

Load

RST

SHDN

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICELINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN ACIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TOVERIFY PROPER AND RELIABLE OPERATION IN THE ACTUALAPPLICATION. COMPONENT SUBSTITUTION AND PRINTEDCIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUITPERFORMANCE OR RELIABILITY. CONTACT LINEARTECHNOLOGY 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

A3Friday, June 29, 2012 1 2

16.8V, 5A BATTERY CHARGER WITH HIGH EFFICIENCY,

AK

DAVID B.

N/ALTC4000EGN, LTC3789EGN

DEMO CIRCUIT 1721ASIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.



1630 McCarthy Blvd.




SCHEMATIC


www.linear.com



AK

DAVID B.


DEMO CIRCUIT 1721ASIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.



1630 McCarthy Blvd.




SCHEMATIC


www.linear.com



AK

DAVID B.


DEMO CIRCUIT 1721A

REVISION HISTORYDESCRIPTION DATEAPPROVEDECO REV

DAVID B.1ST PROTOTYPE1 08-20-10__





GNDGND

GNDGND

BATBAT

VINVIN VOUT-SYSVOUT-SYS

Figure 2. Block Diagram with Typical DC/DC Converter


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PARTS LISTITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

DC1830B-A Required Circuit Components

1 1 C1 CAP., X5R, 4.7µF, 10V, 20% 0603 AVX, 0603ZD475MAT2A

2 1 CBAT CAP., SMT ALUMINUM, 150µF, 35V SUNCON, 35HVP150M

3 1 CBIAS CAP., X7R, 1µF, 16V, 10% 0603 AVX, 0603YC105KAT2A

4 1 CBGATE CAP., X7R, 10nF, 50V, 5% 0603 MURATA, GRM188R71H103JA01D

5 2 CC2, CTMR CAP., X7R, 0.1µF, 50V, 10% 0603 AVX, 06035C104KAT2A

6 2 CIIMON, CIBMON CAP., C0G, 1000pF, 25V, 5% 0603 AVX, 06033A102JAT2A

7 1 CIN CAP., X7R, 1µF, 50V, 10% 1210 AVX, 12105C105KAT2A

8 2 COUT, CL CAP., X7R, 2.2µF, 50V, 10% 1206 MURATA, GRM31CR71H225KA88L

9 1 D1 DIODE ZENER 3.0V 200MW SOD-323 DIODE INC., BZT52C3V0S-7-F

10 1 D2 LED, GREEN, SMT, 0603 LITE-ON, LTST-C190KGKT

11 2 D3, D4 LED 660NM SUPER RED DIFF 0603 SMD LUMEX, SML-LX0603SRW-TR

12 1 F2 FUSE 12A 32V T-LAG 1206 SMD COOPER BUSSMAN, 3216TD12-R

13 2 Q1, Q2 MOSFET P-CHAN., 30V, POWERPAK-8 VISHAY, SI7135DP-T1-GE3

14 2 Q5, Q6 SMALL SIGNAL MOSFET ON SEMI., 2N7002LT1G

15 2 RBFB2, ROFB2 RES., CHIP., 84.5k, 0.1W, 1% 0603 VISHAY, CRCW060384K5FKEA

16 4 RBFB1, ROFB1, R12, R17 RES., CHIP., 1M, 0.1W, 1% 0603 VISHAY, CRCW06031M00FKEA

17 1 RC1 RES., CHIP 4.22k 1/10W 1% 0603 YAGEO, RT0603FRE074K22L

18 1 RCL RES., CHIP., 24.3k, 0.1W, 1% 0603 VISHAY, CRCW060324K3FKEA

19 1 RCS SENSOR RES., 0.01Ω 1W 2% 1508 SMD SUSUMU, RL3720WT-R010-G

20 3 RCX, R8, R13 RES., CHIP., 10k, 0.1W, 1% 0603 YAGEO, RC0603FR-0710KL

21 1 RIS1 SENSOR RES 0.015Ω 1W 2% 1508 SMD SUSUMU, RL3720WT-R015-G

22 1 RIL RES., CHIP., 18.2k, 0.1W, 1% 0603 VISHAY, CRCW060318K2FKEA

23 2 RNTC2, RNTC3, THERMISTOR NTC 10k 5% 0603 VISHAY, NTHS0603N02N1002J

24 1 RVM1 RES., CHIP 35.7k 1/10W 1% 0603 VISHAY, CRCW060335K7FKEA

25 1 RVM2 RES., CHIP 2.49k 1/10W 1% 0603 YAGEO, RC0603FR-072K49L

26 1 R5 RES., CHIP., 2.2k, 0.1W, 5% 0603 VISHAY, CRCW06032K2JKEA

27 3 R4, R7, R19 RES., CHIP., 100k, 0.1W, 5% 0603 VISHAY, CRCW0603100KJKEA

28 2 R6, R18 RES., CHIP., 4.7k, 0.1W, 5% 0603 VISHAY, CRCW06034K7JKEA

29 1 R9 RES., CHIP., 46.4k, 0.1W, 1% 0603 VISHAY, CRCW060346K4FKEA

30 2 R10, R15 RES., CHIP., 20k, 0.1W, 1% 0603 VISHAY, CRCW060320K0FKEA

31 2 R11, R16 RES., CHIP., 38.3k, 0.1W, 1% 0603 VISHAY, CRCW060338K3FKEA

32 1 R14 RES., CHIP., 78.7k, 0.1W, 1% 0603 VISHAY, CRCW060378K7FKEA

33 1 U1 I.C. LTC4000EUFD, 28PIN QFN LINEAR TECH., LTC4000EUFD#PBF

34 2 U2, U3 NANOPWR COMPARATOR, MSOP8 LINEAR TECH., LTC1540CMS8#PBF

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Additional Demo Board Circuit Components

1 0 CC1, CIGATE, CNTC, CCX, CCL, CIL, CVM CAP., 0603 OPT

2 0 CL1, CL2, CL3, CL4, CL5 CAP., 1206, 50V OPT

3 0 F1, F3 FUSE 12A 32V T-LAG 1206 SMD OPT

4 0 Q3, Q4 MOSFET P-CHAN., 30V, POWERPAK-8 OPT

5 0 R1, R2, R3, R20, R21, RIG, RBG, RIFB1, RBFBX, RBFB3, ROFBX

RES., 0603 OPT

Hardware: For Demo Board Only

1 16 E1 - E6, E9 - E14, E18, E19, E20, E21 TESTPOINT, TURRET, 0.061" pbf MILL-MAX, 2308-2-00-80-00-00-07-0

2 5 E7, E8, E15, E16, E17 TESTPOINT, TURRET, 0.094" pbf MILL-MAX, 2501-2-00-80-00-00-07-0

3 4 JP1, JP2, JP3, JP4 HEADER, 3 PIN 0.079 SINGLE ROW SAMTEC, TMM-103-02-L-S

4 4 XJP1, XJP2, XJP3, XJP4 SHUNT, 0.079" CENTER SAMTEC, 2SN-BK-G

5 9 J1, J2, J3, J4, J5, J6, J7, J8, J9 CONNECTOR, BANANA JACK KEYSTONE, 575-4

6 4 MTG1, MTG2, MTG3, MTG4 STAND-OFF, NYLON (SNAP ON), 0.50" TALL KEYSTONE, 8833(SNAP ON)

8dc1830babbf


ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

DC1830B-B Required Circuit Components

1 1 C1 CAP., X5R, 4.7µF, 10V, 20% 0603 AVX, 0603ZD475MAT2A

2 1 CBAT CAP., SMT ALUMINUM, 150µF, 35V SUNCON, 35HVP150M

3 1 CBIAS CAP., X7R, 1µF, 16V, 10% 0603 AVX, 0603YC105KAT2A

4 2 CC2, CTMR CAP., X7R, 0.1µF, 50V, 10% 0603 AVX, 06035C104KAT2A

5 2 CIIMON, CIBMON CAP., C0G, 1000pF, 25V, 5% 0603 AVX, 06033A102JAT2A

6 1 COUT CAP., X7R, 2.2µF, 50V, 10% 1206 MURATA, GRM31CR71H225KA88L

7 1 CIN CAP., X7R, 1µF, 50V, 10% 1210 AVX, 12105C105KAT2A

8 1 D1 DIODE ZENER 3.0V 200MW SOD-323 DIODE INC., BZT52C3V0S-7-F

9 2 D2, D3 LED 660NM SUPER RED DIFF 0603 SMD LUMEX, SML-LX0603SRW-TR

10 1 D4 LED, GREEN, SMT, 0603 LITE-ON, LTST-C190KGKT

11 1 F2 FUSE 12A 32V T-LAG 1206 SMD COOPER BUSSMAN, 3216TD12-R

12 1 Q1 MOSFET P-CHAN., 30V, POWERPAK-8 VISHAY, SI7135DP-T1-GE3

13 2 RBFB1, ROFB1 RES., CHIP., 1M, 0.1W, 1% 0603 VISHAY, CRCW06031M00FKEA

14 1 RBFB2 RES., CHIP., 84.5k, 0.1W, 1% 0603 VISHAY, CRCW060384K5FKEA

15 1 RC1 RES., CHIP 4.22k 1/10W 1% 0603 YAGEO, RT0603FRE074K22L

16 1 RCL RES., CHIP., 24.3k, 0.1W, 1% 0603 VISHAY, CRCW060324K3FKEA

17 1 RCS SENSOR RES., 0.01Ω 1W 2% 1508 SMD SUSUMU, RL3720WT-R010-G

18 2 RCX, R21 RES., CHIP., 0.0Ω, 0.1W, 0603 VISHAY, CRCW06030000Z0EA

19 1 RIL RES., CHIP., 18.2k, 0.1W, 1% 0603 VISHAY, CRCW060318K2FKEA

20 1 RIS1 Sensor RES 0.015Ω 1W 2% 1508 SMD SUSUMU, RL3720WT-R015-G

21 1 RVM1 RES., CHIP 35.7k 1/10W 1% 0603 VISHAY, CRCW060335K7FKEA

22 1 RVM2 RES., CHIP 2.49k 1/10W 1% 0603 YAGEO, RC0603FR-072K49L

23 3 R4, R7, R19 RES., CHIP., 100k, 0.1W, 5% 0603 VISHAY, CRCW0603100KJKEA

24 1 R5 RES., CHIP., 2.2k, 0.1W, 5%, 0603 VISHAY, CRCW06032K2JKEA

25 2 R6, R18 RES., CHIP., 4.7k, 0.1W, 5% 0603 VISHAY, CRCW06034K7JKEA

26 1 R22 0Ω THICK FILM JUMPER CHIP, 2010 IRC., LRC-LRZ-2010LF-R000

27 1 U1 I.C. LTC4000EUFD, 28PIN QFN LINEAR TECH., LTC4000EUFD#PBF

PARTS LIST

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Additional Demo Board Circuit Components

1 0 CC1, CBGATE, CIGATE, CNTC, CCX, CCL, CIL, CVM CAP., 0603 OPT

2 0 CL, CL1, CL2, CL3, CL4, CL5 CAP., 1206, 50V OPT

3 0 F1, F3 FUSE 12A 32V T-LAG 1206 SMD OPT

4 0 RNTC2, RNTC3 THERMISTOR NTC 10k 5% 0603 OPT VISHAY, NTHS0603N02N1002J

5 0 R1, R2, R3, R20, RIG, RBG, RIFB1, RBFBX, RBFB3, ROFBX, ROFB2

RES., 0603 OPT

6 0 R8, R13 RES., CHIP., 10k, 0.1W, 1% 0603 OPT YAGEO, RC0603FR-0710KL

7 0 R9 RES., CHIP., 46.4k, 0.1W, 1% 0603 OPT VISHAY, CRCW060346K4FKEA

8 0 R10, R15 RES., CHIP., 20k, 0.1W, 1% 0603 OPT VISHAY, CRCW060320K0FKEA

9 0 R11, R16 RES., CHIP., 38.3k, 0.1W, 1% 0603 OPT VISHAY, CRCW060338K3FKEA

10 0 R12, R17 RES., CHIP., 1M, 0.1W, 1% 0603 OPT VISHAY, CRCW06031M00FKEA

11 0 R14 RES., CHIP., 78.7k, 0.1W, 1% 0603 OPT VISHAY, CRCW060378K7FKEA

12 0 Q3, Q4 MOSFET P-CHAN., 30V, POWERPAK-8 OPT

13 0 Q5, Q6 SMALL SIGNAL MOSFET OPT ON SEMI., 2N7002LT1G

14 0 U2, U3 NANOPWR COMPARATOR, MSOP8 OPT LINEAR TECH., LTC1540CMS8#PBF

Hardware: For Demo Board Only

1 16 E1 - E6, E9 - E14, E18, E19, E20, E21 TESTPOINT, TURRET, 0.061" pbf MILL-MAX, 2308-2-00-80-00-00-07-0

2 5 E7, E8, E15, E16, E17 TESTPOINT, TURRET, 0.094" pbf MILL-MAX, 2501-2-00-80-00-00-07-0

3 4 JP1, JP2, JP3, JP4 HEADER, 3 PIN 0.079 SINGLE ROW SAMTEC, TMM-103-02-L-S

4 4 XJP1, XJP2, XJP3, XJP4 SHUNT, 0.079" CENTER SAMTEC, 2SN-BK-G

5 9 J1, J2, J3, J4, J5, J6, J7, J8, J9 CONNECTOR, BANANA JACK KEYSTONE, 575-4

6 4 MTG1, MTG2, MTG3, MTG4 STAND-OFF, NYLON (SNAP ON), 0.50" TALL KEYSTONE, 8833(SNAP ON)

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11dc1830babbf


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.

Fig

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4. S

chem

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, Mod

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DC1

619A

as

Used

with

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SCHEMATIC DIAGRAM1 1

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A1

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DEMO

CIR

CUIT

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A1

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4.99

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C515

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5%R3 5.1M

5%

D1 BAS5

21D1 BA

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JP2

MODE

JP2

MODE

R16

6.65

1206

R16

6.65

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JP1

JP1

R14

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R9 49.9K

R9 49.9K

J3

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J3

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R6 (OPT

)

E1VI

NE1

VIN

D2 B160

D2 B160

+CI

N233

uF63

V*

+CI

N233

uF63

V*

R15

0R1

50

+CI

N133

uF63

V*

+CI

N133

uF63

V*

10K

10K

E2GN

DE2GN

D

C6 0.1uF

16V

C6 0.1uF

16V

+CO

UT1

68uF

16V

+CO

UT1

68uF

16V

R2 97.6K

R2 97.6K

12dc1830babbf


LINEAR TECHNOLOGY CORPORATION 2017

LT 0717 • 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 application engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

Copyright © 2004, Linear Technology Corporation

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DC1830B-A

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