DC2043A - Demo Manual

DEMO MANUAL DC2043A
LTC3305EFE
Lead Acid Battery Balancer
Description
Demonstration circuit 2043A is a lead Acid Battery Balancer
featuring the LTC®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
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
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
Figure 1. DC2043A Demo Board
Figure 2. Thermal Image of DC2043A
dc2043af
1
DEMO MANUAL DC2043A
Performance Summary
Specifications are at TA = 25°C
SYMBOL
PARAMETER
CONDITIONS
MIN
MAX
UNITS
VBAT
Battery Voltage Range
16.0
V
VTERMINATE
Termination Voltage Range
TERM2 = 0, TERM1 = 0
±5
VTERMINATE
Termination Voltage Range
TERM2 = 0, TERM1 = 1
±17.5
to
±20
mV
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
VREG
Regulator Output Voltage Range
IVREG = 200µA
±90
to
±110
mV
2.4
to
2.6
4.0
to
V
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,
2
the voltages across the auxiliary cell and BAT1 are compared 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 before make function before the next battery is connect-ed.
The cycle will be repeated for each battery in the stack.
dc2043af
DEMO MANUAL DC2043A
OPERATING PRINCIPLE
In TIMER mode, the balancing operation continues for a
maximum of the programmed tON time. After the tON time,
LTC3305 is 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.
BAT CURRENT
BATTERY BALANCING CURRENT
0.25V DIFFERENTIAL BETWEEN
BATTERY AND AUX BATTERY
dc2043a F03
100mA/DIV
Figure 3. Start-Up Battery Balancing Current
1.There are no ON or OFF states. The balancing operation
continues even if the stack is in balance. The balancing 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 voltage 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.
BAT CURRENT
BATTERY BALANCING CURRENT
0.25V DIFFERENTIAL BETWEEN
BATTERY AND AUX BATTERY
100mA/DIV
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.
dc2043a F04
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.
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 fault pin is put into its high impedance state.
dc2043af
3
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.
5. Set JP2 to EN. Measure the voltage from the BOOST
Test Point to V4. The voltage should read approximately
8.5V.
Follow the procedure below:
6. Measure the voltage from the ISET Test Point to ground.
The voltage should read approximately 1.2V.
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 adjustment 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
monitoring the input current. If the current 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 voltage should read approximately 0V. No LED should be
on.
4
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
OFF
OFF
ON
ON
BATY
LED
OFF
ON
ON
OFF
Active
Battery
BAT1
BAT2
BAT3
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 majority 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
+
PS6
5V
+
10Ω
25W
PS4
10Ω
25W
PS3
10Ω
25W
PS2
5Ω
50W
PS1
+
+
+
Figure 5. Proper Measurement Equipment Set-Up
dc2043af
5
DEMO MANUAL DC2043A
Parts List
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
CAP.,X7R, 4.7µF, 25V, 20%, 0805
TDK, C2012X7R1E475M
Required Circuit Components
1
4
C1-C4
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)
6
dc2043af
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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
GND_K
E16
VEXT_RTN
E15
3.3V - 5.5V
VEXT
BATX
E7
BATY
E6
OVFLT
E5
UVFLT
E4
BAL
E3
DONE
E2
PTCFLT
E1
C11
4.7uF
PTCFLT
D3
LED-LN
RED
R28 1k
R26 1k
R24 1k
PTCFLTB
R29 1k
R27 1k
R25 1k
R23 1k
TP3
U1
CTBAT
TP2
C8
10nF
50V
5%
15
DONEB
DONE
GRN
D4
LED-LN
NG8
16
17
BATX
NG9
18
BATY
20
UVFLTB
19
21
BALB
OVFLTB
22
DONEB
23
LTC3305EFE
CTON
PTCFLTB
TP4
R37
2k
CTOFF
C7
33nF
50V
5%
GND_K
3. INSTALL SHUNTS ON JUMPERS AS SHOWN.
VL
TP14
C9
10nF
50V
5%
NG8
NG9
BATX
BATY
OVFLT
UVFLT
BAL
DONE
PTCFLT
R38
2k
VH
TP15
28.7k
R22
BALB
BAL
D5
LED-LN
GRN
R20 TERM2
TP16
ISET
46.4k 12.1k
R21
E17
VREG
2.5V
R39
2k
UVFLTB
UVFLT
D6
LED-LN
RED
JP3
TERM1
R30
1.82M
0
JP4
1
R40
2k
R31
1.82M
0
1
BATTERY 4
BATTERY 3
BATTERY 2
BATTERY 1
BATTERY BEING
BALANCED
V2
AUXN
AUXP
V3
V4
BOOST
CM
CP
GND
OVFLTB
OVFLT
D7
LED-LN
RED
SD
4
R41
2k
GND_K
6 BAT2_K
C13
10uF
1206
BATY
BATY
D8
LED-LN
GRN
BALB
C12
10uF
1206
BAT1_K
C14
10uF
1206
C15
10uF
1206
BOOST
3 BAT3_K
5
1210
1210
R19 665 R34 665
R33
1.82M
JP1
MODE
BAT4
R42
2k
R36
100k
AUXN_K
E24
AUXP_K
E23
BATX
BATX
R43
2k
Q10
CMPDM8120
1206
D9
LED-LN
GRN
AUXN_K
C16
1206
10uF
1206 F10
1/4A
C6
1206
10uF
1206
AUXP_K
F9
1/4A
C10
1uF
16V
0603
10%
CMMSH1-100G
D1
GND_K
TIMER
CONT.
VREG
± 100mV
±50mV
± 25mV
± 12.5mV
TERMINATION
VOLTAGE
C5
10uF
D2
CMMSH1-100G
1206 TP18
CM R35 249
CP TP17
2 BAT4_K
1
EN
R32
1.82M
38 TP1
37
39
JP2
EN
1
OFF
ON
1
ON
ON
0
0
1
1
OFF
TERM2
0
0
OFF
ON
OFF
TERM1
BATY
LED
BATX
LED
E9
E8
NG7
TP10
NG7
5
6
7
8
10
R16
10
R15
5
6
7
8
Q6
SiR882DP
Q7
SiR882DP
3
2
1
R6
6.04k
R7
6.04k
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
CUSTOMER NOTICE
10
R18
Q9
SiR882DP
3
5
2
6
1
7
8
R9 6.04k
5
6
7
8
3
2
1
NG5
SCALE = NONE
JD
NC
3
-
8
7
6
5
0805
1
2
3
SiR882DP
Q2
N/A
DATE:
SIZE
9 - 23 - 14
IC NO.
Q5
R1
1
2
3
6.04K
1
2
3
6.04K
R2
Q3_2
SiR882DP
8
7
6
5
SiR882DP
8
7
6
5
Q4
C4
4.7uF
F1
7A
E20
E12
BAT2_K
BAT2
GND
E22
GND_K
E14
9.5V-15.5V
E21
E13
BAT1_K
BAT1
9.5V-15.5V
GND_K
1206
E19
BAT3_K
E11
BAT3
9.5V-15.5V
1206
F2
7A
E18
9.5V-15.5V
1206
F3
7A
E10
1206
BAT4_K
BAT4
F4
7A
F8 1206
1/4A
1206
F7
1/4A
1206
F6
1/4A
1206
F5
1/4A
DATE
9- 23 - 14
LTC3305EFE
DEMO CIRCUIT 2043A
SHEET
1
3
REV.
OF 1
LEAD ACID BATTERY BALANCER
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
GND
BAT1_K
C1
4.7uF
BAT1
BAT2_K
C2
4.7uF
BAT2
BAT3_K
C3
4.7uF
BAT3
BAT4_K
BAT4
JD
SiR882DP
8
7
6
5
APPROVED
DESCRIPTION
REVISION HISTORY
PRODUCTION FAB
TECHNOLOGY
SiR882DP
Q1
8
7
6
5
R10 12.1k
0805
R11 12.1k
1
2
3
R3 3.01K
R12 10
1
2
3
R4 6.04K
R13 10
1
2
3
R5 6.04k
R14 10
REV
ECO
TITLE: SCHEMATIC
NG1
NG2
APPROVALS
TP5
NG1
8
7
6
5
Q3_1
SiR882DP
TP13
NG3
NG3
TP7
NG4
NG4
TP8
NG5
TP6
NG2
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.
NG9
Q8
SiR882DP
R8 6.04K
3
2
1
TP11
R17
NG8
NG8
10
AUXN
9.5V-15.5V
AUXP
PTGLESARR15M1B51B0
RT1
NG6
TP9
NG6
TP12
NG9
t
1
2
2. ALL CAPACITORS ARE IN MICROFARADS, 0805, 20%, 25V.
24
NG7 14
4
1. ALL RESISTORS ARE IN OHMS, 0402, 1%, 1/16W.
25
CTOFF
NG7
26
NG6 13
CTON
27
CTBAT
NG6
28
VL
29
VH
NG5
NG5 12
30
NG4 11
ISET
31
VREG
NG4
32
NG3 10
TERM2
33
TERM1
NG3
34
EN2
35
EN1
9
NG2
NG2
NC
36
MODE
NG1
8
NG1
V1
7
4
4
4
4
4
4
4
4
4
NOTES: UNLESS OTHERWISE SPECIFIED
DEMO MANUAL DC2043A
Schematic Diagram
dc2043af
7
DEMO MANUAL DC2043A
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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Linear Technology Corporation
LT 1214 • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2014
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