Linear Technology DC1721B-B Quick setup guide

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dc1721bf
DEMO MANUAL
DC1721B-A/DC1721B-B
DESCRIPTION
LTC4000EGN(-1)/LTC3789EGN
14.6V, 5A Battery Charger with
6VIN to 36VIN Buck-Boost Converter
Demonstrationcircuit1721B is a 14.6V, 5A batterycharger
and PowerPath™ manager with 6VIN to 36VIN buck-boost
converter featuring the LTC4000/LTC3789, targeted at
4-cell LiFePO4applications. 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 voltage can be accurately
trimmedbyusingtrimresistors R42 and R43. For example,
for 14.4V battery float voltage, change ROFB2 and RBFB2
to 86.6k, and add 7.5M at R42 and R43 for greater set
point accuracy.
This circuit was designed to demonstrate the high levels of
performance, efficiency, and small solution size attainable
using these ICs in a buck-boost converter battery charger,
intelligent PowerPath manager, and power supply. It oper-
ates at 400kHz and produces a regulated 5A/14.6V battery
charger output as well as a system output of up to 6.25A
from an input voltage range of 6V to 36V: suitable for a
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
PERFORMANCE SUMMARY
wide variety of portableapplications including instruments,
industrial equipment, power tools, and computers. It has
a total footprint area of 12.4cm2(3.6cm2for the LTC4000
circuit only). Synchronous rectification helps to attain
efficiency exceeding 96% at full load and nominal input.
DC1721B-A: The LTC4000 has an input current limit/
regulation loop that prevents overloading sources with
limited output capability.
DC1721B-B: The LTC4000-1 instead has an input voltage
regulation loop for Maximum Power Point (MPP) control.
MPP control extracts near maximum power from high
impedance sources such as solar panels, wind turbines,
or fuel cells.
Design files for this circuit board are available at
http://www.linear.com/demo
Specifications are at TA= 25°C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input Supply Range 636V
VIN-MP1Input Regulation Voltage This Is the Input Voltage Lower Limit Set by the LTC4000-1 11.85 V
IIN2Input Current Limit 11 A
VFLOAT Battery Float Voltage 14.4 14.6 14.8 V
Output Regulation Line and Load (6V to 36V, 0A to 5A) ±0.05 %
IBAT Battery Charge Current 5.0 A
VOUT-SYS System Output Voltage 12.3 14.6 15.5 V
IOUT-SYS System Output Current Range 0 6.25 A
FSW Switching (Clock) Frequency 400 kHz
VOUT-SYS P-P System Output Ripple VIN = 24V, IOUT-SYS = 5A (20MHz BW) 50 mVP-P
POUT/PIN System Output Efficiency (See Figure 3) VIN = 24V, IOUT-SYS = 5A 96.5 %
Approximate Size Component Area ×Top Component Height 12.4cm2×0.40cm
1DC1721B-B (LTC4000-1) Only,
2DC1721B-A (LTC4000) Only
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DEMO MANUAL
DC1721B-A/DC1721B-B
QUICK START PROCEDURE
Demonstration circuit 1721 is easy to set up to evaluate the
performance of the LTC4000/LTC3789. Refer to Figure1
for proper measurement equipment setup and follow the
procedure below:
WARNING:BATTERIESARE POTENTIALLY DANGER-
OUS HIGH ENERGY SOURCES. IMPROPER CON-
NECTION, OVERCHARGE, OR RAPID DISCHARGE
COULD RESULT IN EXPLOSION AND/OR FIRE.
NOTE. When measuringthe outputvoltage ripple, caremust
be taken to avoid a long ground lead on the oscilloscope
probe. Measure the output voltage ripple by touching the
probe tip and ground ring directly across the last output
capacitor as shown in Figure 1.
1. Set MODE jumper to CCM. Set CHARGE jumper to
DISABLE.
2. Set an input power supply that is capable of 6V to 36V
and 12A to 24V. Then turn off the supply.
3. With power off, connect thesupply to theinput terminals
VIN and GND.
NOTE.
a. Input voltages lower than 6V can keep the converter
from turning on due to the undervoltage lockout feature
of the LTC4000.
b. Ifefficiencymeasurementsaredesired, refer to Figure1
for test setup.
4. Turn on the power at the input.
NOTE. Make sure that the input voltage never exceeds 36V.
5. Check for the proper VOUT-SYS of 15.3V. Turn off the
power at the input.
6. Once the proper output voltages are established, con-
nect a variable load capable of sinking 7A at 16V to the
output terminals VOUT-SYS and GND. Set the current
for 0A.
7. Turn on the power at the input.
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 VOUT-SYS is again established, adjust
the load and/or source within the operating range and
observe the output voltage regulation, ripple voltage,
efficiency, input and output current limit, and other
desired parameters.
9. Turn off the power at the input.
10.Connect the output load and meters to the BAT output.
11.Set CHARGE jumper to ENABLE.
12.Turn on the power at the input.
13.Once the proper VOUT-SYS is again established, adjust
the load and/or source within the operating range and
observe the battery float voltage regulation and other
desired parameters.
14.Set the load to constant voltage mode to more easily
observe charge current and trickle charge current.
15.(DC1721B-B 0NLY) In order to observe MPP operation,
add a 0.25Ω to 0.3Ω, 10W resistor in series with the
DC source and set the source to 13V. Use a constant
voltage or constant resistance load characteristic. As
the load is increased, the input voltage will be regulated
at the MPP regulation point (11.75V) by reducing the
output of the DC/DC converter.
NOTE. Operation in the Instant-On region (VOUT < 12.5V)
may engage thermal limit circuit to protect Q7 in the linear
region.
NOTE.Theoptionalthermallimitcircuit for Q6 (Q9, RNTC3,
R55-59, and U4) is included to protect Q6 in case of an
extended short circuit on VOUT-SYS underadverse thermal
conditions (TA> 40°C). It may not be needed in applica-
tions with less severe thermal conditions, lower current
available to VOUT-SYS, or where continuous short-circuit
protection on VOUT-SYS is not required.
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DEMO MANUAL
DC1721B-A/DC1721B-B
QUICK START PROCEDURE
Figure 1. Proper Measurement Equipment Setup
Figure 2. Proper Noise Measurement Setup
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DEMO MANUAL
DC1721B-A/DC1721B-B
QUICK START PROCEDURE
Figure 4. LTC4000/LTC3789 System Block Diagram, DC1721B-A
Rsense-input
A5
A7
A6
A4
Gm
A10
A8
A9
Rsense-charge
DC - DC CONVERTER
ITH
LTC4000 Gm
Gm
Gm
Gm
LTC3789
NOT ON THE BOARD
GNDGND
++
RC1RC1
CC1CC1
VOUT-SYSVOUT-SYS
BATBAT
VINVIN
10nF10nF
++
CC2CC2
Figure 3. Efficiency from VIN to VOUT-SYS
DC1721A LTC4000 and
LTC3789 Efficiency
IOUT (A)
0.5
EFFICIENCY (%)
100
95
85
90
80 2.5 4.51.5 3.5 5.5
VIN = 36V
VIN = 24V
VIN = 6V
VIN = 15V
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DEMO MANUAL
DC1721B-A/DC1721B-B
Figure 5. LTC4000-1/LTC3789 System Block Diagram, DC1721B-B
A5
A7
A6
A4
Gm
A10
A8
A9
Rsense-charge
DC - DC CONVERTER
ITH
LTC4000-1 Gm
Gm
Gm
Gm
LTC3789
NOT ON THE BOARD
GNDGND
++
RC1RC1
CC1CC1
VOUT-SYSVOUT-SYS
BATBAT
VINVIN
10nF10nF
++
CC2CC2
QUICK START PROCEDURE
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DEMO MANUAL
DC1721B-A/DC1721B-B
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
DC1721B-A Required Circuit Components
1 4 C1, C2, C16, C17 CAP., X5R, 22μF, 25V, 10% 1210 AVX, 12103D226KAT2A
2 2 C4, C22 CAP., X7R, 0.22μF, 16V, 10% 0603 AVX, 0603YC224KAT2A
3 4 C5, C6, C9, C25 CAP., X7R, 3.3μF, 50V, 10% 1210 AVX, 12105C335KAT2A
4 1 C10 CAP., X5R, 2.2μF, 6.3V, 20% 0603 AVX, 06036D225MAT2A
5 1 C12 CAP., NPO, 390pF, 100V, 5% 1206 AVX, 12061A391JAT2A
6 1 C13 CAP., NPO, 1800pF, 100V, 5% 1206 AVX, 12061A182JAT2A
7 2 C15, CIN CAP., X7R, 1μF, 50V, 10% 1210 AVX, 12105C105KAT2A
8 1 C18 CAP., X7R, 10μF, 10V, 10% 1206 AVX, 1206ZC106KAT2A
9 1 C19 CAP., C0G, 1000pF, 25V, 5% 0603 AVX, 06033A102JAT2A
10 2 C24, CBIAS CAP., X7R, 1μF, 16V, 10% 0603 AVX, 0603YC105KAT2A
11 2 C34, C35 CAP., X7R, 0.01μF, 25V, 5% 0603 AVX, 06033C103JAT2A
12 3 CC2, C14, CTMR CAP., X7R, 0.1μF, 50V, 10% 0603 AVX, 06035C104KAT2A
13 2 CIN1, CIN2 CAP., ALUM., HVH, 56μF, 50V SUN Electronics, 50HVH56M
14 1 CL CAP., X5R, 2.2μF, 25V, 20% 0805 AVX, 08053D225MAT2A
15 2 COUT1, COUT2 CAP., OS-CON, 150μF, 20V, 20% SANYO, 20SVP150M
16 1 CSS CAP., X7R, 0.022μF, 50V, 10%, 0603 AVX, 06035C223KAT2A
17 1 D2 DIODE, SWITCH 75V 350MW SOT23-3 DIODES/ZETEX, BAS16-7-F
18 1 D10 DIODE, ZENER 5.6V 500MW SOD-123 DIODES/ZETEX, BZT52C5V6-7-F
19 2 D4, D7 DIODE, SCHOTTKY 1A 60V POWERDI123 DIODES/ZETEX, DFLS160-7
20 2 D5, D6 DIODE, SCHOTTKY 40V 2A SMA DIODES/ZETEX, B240A-13-F
21 1 D9 DIODE, ZENER 3V 500MW SOD-323 DIODES/ZETEX, BZT52C3V0S-7-F
22 1 F1 FUSE, 6.3A 32V T-LAG 1206 SMD COOPER BUSSMAN, 3216TD6.3-R
23 1 L1 INDUCTOR, 4.7μH TOKO, FDA1254-4R7M
24 2 Q2, Q4 MOSFET, N-Chan., 40V, POWERPAK-8 VISHAY, SiR422DP-T1-GE3
25 2 Q3, Q5 MOSFET, N-Chan., 20V, POWERPAK-8 VISHAY, SiR496DP-T1-GE3
26 2 Q6, Q7 MOSFET, P-Chan., 30V, POWERPAK-8 VISHAY, Si7135DP-T1-GE3
27 2 Q8, Q9 MOSFET, SMALL SIGNAL SOT23 ON SEMI., 2N7002LT1G
28 1 R1 RES., CHIP., 5.6Ω, 0.1W, 5% 0603 VISHAY, CRCW06035R60JNEA
29 2 R2, R18 SENSOR RES 0.008Ω 1W 2% 0815 SMD SUSUMU, RL3720WT-R008-G
30 4 R3, R4, R13, R14 RES., CHIP., 100Ω, 0.1W, 5%, 0603 VISHAY, CRCW0603100RJNEA
31 1 R5 RES., CHIP., 15Ω, 0.125W, 5% 0805 VISHAY, CRCW080515R0JNEA
32 2 R7, R49 RES., CHIP., 100k, 0.1W, 1% 0603 VISHAY, CRCW0603100KFKEA
33 2 R8, R11 RES., CHIP., 10Ω, 0.1W, 5% 0603 VISHAY, CRCW060310R0JNEA
34 2 R9, R10 RES., CHIP., 1.24k, 0.1W, 1% 0603 VISHAY, CRCW06031K24FKEA
35 1 R20 SENSOR RES 0.004Ω 1W 2% 0815 SMD SUSUMU, RL3720WT-R004-G
36 1 R21 RES., CHIP., 121k, 0.1W, 1% 0603 VISHAY, CRCW0603121KFKEA
37 6 R24, R48, R55, R60, RCX, RVM2 RES., CHIP., 10k, 0.1W, 1% 0603 VISHAY, CRCW060310K0FKEA
38 1 R28 RES., CHIP, 5.6Ω, 5%, 1206 VISHAY, CRCW12065R60JNEA
39 1 R29 RES., CHIP, 3.6Ω, 5%, 1206 VISHAY, CRCW12063R60JNEA
40 2 R44, R58 RES., CHIP., 38.3k, 0.1W, 1% 0603 VISHAY, CRCW060338K3FKEA
41 2 R50, R57 RES., CHIP., 20k, 0.1W, 1% 0603 VISHAY, CRCW060320K0FKEA
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dc1721bf
DEMO MANUAL
DC1721B-A/DC1721B-B
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
42 1 R56 RES., CHIP., 68.1k, 0.1W, 1% 0603 VISHAY, CRCW060368K1FKEA
43 1 RC1 RES., CHIP., 14.7k, 0.1W, 1% 0603 VISHAY, CRCW060314K7FKEA
44 1 RCL RES., CHIP., 24k, 0.1W, 5% 0603 VISHAY, CRCW060324K0JNEA
45 1 RCS SENSOR RES., 0.01Ω 1W 2% 0815 SMD SUSUMU, RL3720WT-R010-G
46 1 RFB1 RES., CHIP., 154k, 0.1W, 1% 0603 VISHAY, CRCW0603154KFKEA
47 1 RFB2 RES., CHIP., 8.06k, 0.1W, 1% 0603 VISHAY, CRCW06038K06FKEA
48 1 RIG RES., CHIP., 10M, 0.1W, 5% 0603 VISHAY, CRCW060310MJNEA
49 1 RIL RES., CHIP., 18.2k, 0.1W, 1% 0603 VISHAY, CRCW060318K2FKEA
50 2 RNTC2, RNTC3 THERMISTOR NTC 10k 5% 0603 VISHAY, NTCS0603E3103JMT
51 4 ROFB1, RBFB1, R45, R59 RES., CHIP., 1M, 0.1W, 1% 0603 VISHAY, CRCW06031M00FKEA
52 2 ROFB2, RBFB2 RES., CHIP., 84.5k, 0.1W, 1% 0603 VISHAY, CRCW060384K5FKEA
53 1 RVM1 RES., CHIP., 36.5k, 0.1W, 1% 0603 VISHAY, CRCW060336K5FKEA
54 1 U1 I.C., VOLT. REG. Linear Tech., LTC3789EGN#PBF
55 1 U2 I.C. LTC4000EGN, 28 PIN SSOP Linear Tech., LTC4000EGN#PBF
56 2 U3, U4 NANOPWR COMPARATOR, MSOP8 Linear Tech., LTC1540CMS8#PBF
DC1721B-A Additional Demo Board Circuit Components
57 0 C3, C23, C26, C27 OPT 1210
58 1 C33 CAP., X5R, 4.7μF, 10V, 20% 0603 AVX, 0603ZD475MAT2A
59 1 CBAT CAP., X5R, 2.2μF, 25V, 20% 0805 AVX, 08053D225MAT2A
60 0 CF1, CC1, R6, C7, C8, C11, R12, R22, R27, R30,
R38-R43, R53, R61, R62, CNTC, CF, CCX
OPT 0603 OPT
61 2 CIIMON, CIBMON CAP., C0G, 1000pF, 25V, 5% 0603 AVX, 06033A102JAT2A
62 0 CIN3, CIN4 OPT
63 0 D11 OPT SOD323 OPT
64 1 LED2 LED, DUAL RED/GREEN LiteOn, LTST-C155KGJRKT
65 0 Q10 OPT SOT223 OPT
66 4 R25, R51, R52, R54 RES., 0Ω 1/16W 1A 0603 VISHAY, CRCW06030000Z0EA
67 1 R46 RES., CHIP., 2.2k, 0.1W, 5% 0603 VISHAY, CRCW06032K20JNEA
68 1 R47 RES., CHIP., 4.7k, 0.1W, 5% 0603 VISHAY, CRCW06034K70JNEA
69 0 RIFB1 OPT 0603 OPT
DC1721B-A Hardware: For Demo Board Only
70 6 E1, E2, E15, E17, E18, E20 TESTPOINT, TURRET, 0.061" PbF MILL-MAX, 2308-2-00-80-00-00-07-0
71 12 E3-E14 TESTPOINT, TURRET, 0.094" PbF MILL-MAX, 2501-2-00-80-00-00-07-0
72 5 J1, J2, J3, J4, J5 CONNECTOR, BANANA JACK KEYSTONE, 575-4
73 2 JP1, JP2 HEADER, 3 PIN 0.079 SINGLE ROW SAMTEC, TMM-103-02-L-S
74 4 MH1-MH4 STAND-OFF, NYLON 0.5" KEYSTONE, 8833 (SNAP ON)
75 2 XJP1, XJP2 SHUNT, 0.079" CENTER SAMTEC, 2SN-BK-G
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DEMO MANUAL
DC1721B-A/DC1721B-B
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
DC1721B-B Required Circuit Components
1 4 C1, C2, C16, C17 CAP., X5R, 22μF, 25V, 10% 1210 AVX, 12103D226KAT2A
2 2 C4, C22 CAP., X7R, 0.22μF, 16V, 10% 0603 AVX, 0603YC224KAT2A
3 4 C5, C6, C9, C25 CAP., X7R, 3.3μF, 50V, 10% 1210 AVX, 12105C335KAT2A
4 1 C10 CAP., X5R, 2.2μF, 6.3V, 20% 0603 AVX, 06036D225MAT2A
5 1 C12 CAP., NPO, 390pF, 100V, 5% 1206 AVX, 12061A391JAT2A
6 1 C13 CAP., NPO, 1800pF, 100V, 5% 1206 AVX, 12061A182JAT2A
7 2 C15, CIN CAP., X7R, 1μF, 50V, 10% 1210 AVX, 12105C105KAT2A
8 1 C18 CAP., X7R, 10μF, 10V, 10% 1206 AVX, 1206ZC106KAT2A
9 1 C19 CAP., C0G, 1000pF, 25V, 5% 0603 AVX, 06033A102JAT2A
10 2 C24, CBIAS CAP., X7R, 1μF, 16V, 10% 0603 AVX, 0603YC105KAT2A
11 2 C34, C35 CAP., X7R, 0.01μF, 25V, 5% 0603 AVX, 06033C103JAT2A
12 3 CC2, C14, CTMR CAP., X7R, 0.1μF, 50V, 10% 0603 AVX, 06035C104KAT2A
13 2 CIN1, CIN2 CAP., ALUM., HVH, 56μF, 50V SUN Electronics, 50HVH56M
14 1 CL CAP., X5R, 2.2μF, 25V, 20% 0805 AVX, 08053D225MAT2A
15 2 COUT1, COUT2 CAP., OS-CON, 150μF, 20V, 20% SANYO, 20SVP150M
16 1 CSS CAP., X7R, 0.022μF, 50V, 10%, 0603 AVX, 06035C223KAT2A
17 1 D2 DIODE, SWITCH 75V 350MW SOT23-3 DIODES/ZETEX, BAS16-7-F
18 2 D4, D7 DIODE, SCHOTTKY 1A 60V POWERDI123 DIODES/ZETEX, DFLS160-7
19 2 D5, D6 DIODE, SCHOTTKY 40V 2A SMA DIODES/ZETEX, B240A-13-F
20 1 D9 DIODE, ZENER 3V 500MW SOD-323 DIODES/ZETEX, BZT52C3V0S-7-F
21 1 D10 DIODE, ZENER 5.6V 500MW SOD-123 DIODES/ZETEX, BZT52C5V6-7-F
22 1 F1 FUSE, 6.3A 32V T-LAG 1206 SMD COOPER BUSSMAN, 3216TD6.3-R
23 1 L1 INDUCTOR, 4.7μH TOKO, FDA1254-4R7M
24 2 Q2, Q4 MOSFET, N-Chan., 40V, POWERPAK-8 VISHAY, SiR422DP-T1-GE3
25 2 Q3, Q5 MOSFET, N-Chan., 20V, POWERPAK-8 VISHAY, SiR496DP-T1-GE3
26 2 Q6, Q7 MOSFET, P-Chan., 30V, POWERPAK-8 VISHAY, Si7135DP-T1-GE3
27 2 Q8, Q9 MOSFET, SMALL SIGNAL SOT23 ON SEMI., 2N7002LT1G
28 1 R1 RES., CHIP., 5.6Ω, 0.1W, 5% 0603 VISHAY, CRCW06035R60JNEA
29 2 R2, R18 SENSOR RES 0.008Ω 1W 2% 0815 SMD SUSUMU, RL3720WT-R008-G
30 4 R3, R4, R13, R14 RES., CHIP., 100Ω, 0.1W, 5%, 0603 VISHAY, CRCW0603100RJNEA
31 1 R5 RES., CHIP., 15Ω, 0.125W, 5% 0805 VISHAY, CRCW080515R0JNEA
32 2 R7, R49 RES., CHIP., 100k, 0.1W, 1% 0603 VISHAY, CRCW0603100KFKEA
33 2 R8, R11 RES., CHIP., 10Ω, 0.1W, 5% 0603 VISHAY, CRCW060310R0JNEA
34 2 R9, R10 RES., CHIP., 1.24k, 0.1W, 1% 0603 VISHAY, CRCW06031K24FKEA
35 1 R20 SENSOR RES 0.004Ω 1W 2% 0815 SMD SUSUMU, RL3720WT-R004-G
36 1 R21 RES., CHIP., 121k, 0.1W, 1% 0603 VISHAY, CRCW0603121KFKEA
37 6 R24, R48, R55, R60, RCX, RVM2 RES., CHIP., 10k, 0.1W, 1% 0603 VISHAY, CRCW060310K0FKEA
38 1 R28 RES., CHIP, 5.6Ω, 5%, 1206 VISHAY, CRCW12065R60JNEA
39 1 R29 RES., CHIP, 3.6Ω, 5%, 1206 VISHAY, CRCW12063R60JNEA
40 2 R44, R58 RES., CHIP., 38.3k, 0.1W, 1% 0603 VISHAY, CRCW060338K3FKEA
41 2 R50, R57 RES., CHIP., 20k, 0.1W, 1% 0603 VISHAY, CRCW060320K0FKEA
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dc1721bf
DEMO MANUAL
DC1721B-A/DC1721B-B
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
42 1 R56 RES., CHIP., 68.1k, 0.1W, 1% 0603 VISHAY, CRCW060368K1FKEA
43 1 RC1 RES., CHIP., 14.7k, 0.1W, 1% 0603 VISHAY, CRCW060314K7FKEA
44 1 RCL RES., CHIP., 24k, 0.1W, 5% 0603 VISHAY, CRCW060324K0JNEA
45 1 RCS SENSOR RES., 0.01Ω 1W 2% 0815 SMD SUSUMU, RL3720WT-R010-G
46 1 RFB1 RES., CHIP., 154k, 0.1W, 1% 0603 VISHAY, CRCW0603154KFKEA
47 1 RFB2 RES., CHIP., 8.06k, 0.1W, 1% 0603 VISHAY, CRCW06038K06FKEA
48 1 RIFB1 RES., CHIP., 21.5k, 0.1W, 1% 0603 VISHAY, CRCW060321K5FKEA
49 1 RIG RES., CHIP., 10M, 0.1W, 5% 0603 VISHAY, CRCW060310MJNEA
50 1 RIL RES., CHIP., 2.00k, 0.1W, 1% 0603 VISHAY, CRCW06032K00FKEA
51 2 RNTC2, RNTC3 THERMISTOR NTC 10k 5% 0603 VISHAY, NTCS0603E3103JMT
52 4 ROFB1, RBFB1, R45, R59 RES., CHIP., 1M, 0.1W, 1% 0603 VISHAY, CRCW06031M00FKEA
53 2 ROFB2, RBFB2 RES., CHIP., 84.5k, 0.1W, 1% 0603 VISHAY, CRCW060384K5FKEA
54 1 RVM1 RES., CHIP., 36.5k, 0.1W, 1% 0603 VISHAY, CRCW060336K5FKEA
55 1 U1 I.C., VOLT. REG. Linear Tech., LTC3789EGN#PBF
56 1 U2 I.C. LTC4000EGN-1, 28 PIN SSOP Linear Tech., LTC4000EGN-1#PBF
57 2 U3, U4 NANOPWR COMPARATOR, MSOP8 Linear Tech., LTC1540CMS8#PBF
DC1721B-B Additional Demo Board Circuit Components
58 0 C3, C23, C26, C27 OPT 1210
59 1 C33 CAP., X5R, 4.7μF, 10V, 20% 0603 AVX, 0603ZD475MAT2A
60 1 CBAT CAP., X5R, 2.2μF, 25V, 20% 0805 AVX, 08053D225MAT2A
61 0 CF1, CC1, R6, C7, C8, C11, R12, R22, R27, R30,
R38-R43, R53, R61, R62, CNTC, CF, CCX
OPT 0603 OPT
62 2 CIIMON, CIBMON CAP., C0G, 1000pF, 25V, 5% 0603 AVX, 06033A102JAT2A
63 0 CIN3, CIN4 OPT
64 0 D11 OPT SOD323 OPT
65 1 LED2 LED, DUAL RED/GREEN LiteOn, LTST-C155KGJRKT
66 0 Q10 OPT SOT223 OPT
67 4 R25, R51, R52, R54 RES., 0Ω 1/16W 1A 0603 VISHAY, CRCW06030000Z0EA
68 1 R46 RES., CHIP., 2.2k, 0.1W, 5% 0603 VISHAY, CRCW06032K20JNEA
69 1 R47 RES., CHIP., 4.7k, 0.1W, 5% 0603 VISHAY, CRCW06034K70JNEA
DC1721B-B Hardware: For Demo Board Only
70 6 E1, E2, E15, E17, E18, E20 TESTPOINT, TURRET, 0.061" PbF MILL-MAX, 2308-2-00-80-00-00-07-0
71 12 E3-E14 TESTPOINT, TURRET, 0.094" PbF MILL-MAX, 2501-2-00-80-00-00-07-0
72 5 J1, J2, J3, J4, J5 CONNECTOR, BANANA JACK KEYSTONE, 575-4
73 2 JP1, JP2 HEADER, 3 PIN 0.079 SINGLE ROW SAMTEC, TMM-103-02-L-S
74 4 MH1-MH4 STAND-OFF, NYLON 0.5" KEYSTONE, 8833 (SNAP ON)
75 2 XJP1, XJP2 SHUNT, 0.079" CENTER SAMTEC, 2SN-BK-G
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10
dc1721bf
DEMO MANUAL
DC1721B-A/DC1721B-B
SCHEMATIC DIAGRAM
5 5
4 4
3 3
2 2
1 1
D D C C B B A A
CHARGE
ENABLE
DISABLE
AND POWER MANAGER
R20
NOT ON THE BOARD
FROM PAGE 2
1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE IN MICROFARADS, 0603. NOTE: UNLESS OTHERWISE SPECIFIED
15V
GND
GND
THERMAL REGULATION FOR Q7 DURING 'INSTANT-ON' OPERATION
OPTIONAL THERMAL PROTECTION FOR Q6 DURING VOUT-SYS SHORT CIRCUIT
6.25A LIMIT
-A LTC4000EGN
U2
-B
ASSY
*
21.5KLTC4000EGN-1
RIFB1
OPT
*
RIL
18.2K 2.00K
TMR
TMR
CHRG
CHRG
ITH
VIN+
RUN
VOUT
BIAS
NTC
BIAS
NTC
BIAS
INTVCC
VIN+
VIN
BIAS
IL
IL
IL
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] 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
2
Wednesday, February 06, 2013
12
STEP UP/DOWN BATTERY CHARGER
LT
DAVID B.
N/A
LTC4000EGN / EGN-1, LTC3789EGN
DEMO CIRCUIT 1721B
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] 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
2
Wednesday, February 06, 2013
12
STEP UP/DOWN BATTERY CHARGER
LT
DAVID B.
N/A
LTC4000EGN / EGN-1, LTC3789EGN
DEMO CIRCUIT 1721B
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] 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
2
Wednesday, February 06, 2013
12
STEP UP/DOWN BATTERY CHARGER
LT
DAVID B.
N/A
LTC4000EGN / EGN-1, LTC3789EGN
DEMO CIRCUIT 1721B
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
DAVID B.
PRODUCTION
2 1-29-13
__
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
DAVID B.
PRODUCTION
2 1-29-13
__
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
DAVID B.
PRODUCTION
2 1-29-13
__
+
-
U3
LTC1540CMS8
+
-
U3
LTC1540CMS8
GND
1V-
2
IN+
3
IN-
4
HYST
5
6 REF
6
V+ 7
OUT 8
E15E15
RCL 24K RCL 24K
CBIAS
1uF
10V CBIAS
1uF
10V
RNTC3
10K
RNTC3
10K
Q8
2N7002L
Q8
2N7002L
1
32
RCS
10m
RCS
10m
R48 10K R48 10K
R39 OPT R39 OPT
U2U2
VM
25
RST
26
IIMON
27
IL/IFB
28
ENC
1
IBMON
2
CX 3
CL
4
TMR
5
GND
6
FLT
7
CHRG
8
BIAS 9
NTC 10
FBG 11
BFB 12
BAT 13
BGATE 14
CSN 15
CSP 16
OFB 17
IGATE 18
IID 19
ITH
20
CC 21
CLN
22
IN
23
GND
24
CCX
OPT
CCX
OPT
C35 0.01uF C35 0.01uF
E14
NTC
E14
NTC
R49
100K
R49
100K
Q9 2N7002L Q9 2N7002L
1
32
E10
IBMON
E10
IBMON
R54
0
R54
0
C33
4.7uF
10V C33
4.7uF
10V
RC1
14.7K
RC1
14.7K
R42 OPTR42 OPT
RBFB2 84.5K RBFB2 84.5K
CC2
0.1uF
CC2
0.1uF
RVM1 36.5K RVM1 36.5K
E17E17
CTMR
0.1uF
CTMR
0.1uF
RIFB1
*
RIFB1
*
R46 2.2K R46 2.2K
CIBMON
1000pF
CIBMON
1000pF
CBAT 2.2uF
0805
25V CBAT 2.2uF
0805
25V
RNTC2 10K RNTC2 10K
J5
GND
J5
GND
R51
0
R51
0
Q6
Si7135D
Q6
Si7135D
4
5 1
2 3
6 7 8
J4 BAT
14.6V / 5A
J4 BAT
14.6V / 5A
R56 68.1K R56 68.1K
GRN RED LED2 GRN RED LED2
2
3 1 4
R43 OPTR43 OPT
E20E20
R53
OPT
R53
OPT
R62 OPT R62 OPT
E11
IIMON
E11
IIMON
RVM2
10K
RVM2
10K
RIL
*
RIL
*
CIN 1uF
1210
50V
CIN 1uF
1210
50V
CIIMON
1000pF
CIIMON
1000pF
RBFB1 1.00M RBFB1 1.00M
R58
38.3K
R58
38.3K
ROFB2 84.5K ROFB2 84.5K
RIG
10M
RIG
10M
R59
1.00M
R59
1.00M
D9
BZT52C3V0S
D9
BZT52C3V0S
1
2
+
-
U4
LTC1540CMS8
+
-
U4
LTC1540CMS8
GND
1V-
2
IN+
3
IN-
4
HYST
5
6 REF
6
V+ 7
OUT 8
CC1
OPT
CC1
OPT
R45
1.00M
R45
1.00M
CNTC
OPT
CNTC
OPT
JP1JP1
1
2
3
J3
VOUT-SYS
J3
VOUT-SYS
R52
0
R52
0E18E18
R50 20K R50 20K
R57 20K R57 20K
CL 2.2uF
0805
25V CL 2.2uF
0805
25V
RCX 10K RCX 10K
E12
FLT E12 FLT R47
4.7K
R47
4.7K
F1
6.3A
F1
6.3A
R55
10K
R55
10K
ROFB1 1.00M ROFB1 1.00M
Q7
Si7135D
Q7
Si7135D
4
51
2 36
7 8
R38 OPT R38 OPT
E13
CHRG E13 CHRG
R44
38.3K
R44
38.3K
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11
dc1721bf
DEMO MANUAL
DC1721B-A/DC1721B-B
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
5 5
4 4
3 3
2 2
1 1
D D C C B B A A
<------ ------>
MODE
AND POWER MANAGER
CIRCUITRY ON THIS SIDE MUST CONNECT TO SIGNAL GND GROUNDPLANE
CIRCUITRY ON THIS SIDE MUST CONNECT TO POWER GND GROUNDPLANE
10V
(FZT603)
(10K)
(MM3Z10VT1)
PULSE SKIP
CCM
11A MAX
VOS+
VOS+
VOUT
INTVCC
INTVCC
INTVCC
VIN+
VOUT1
INTVCC
ITH
RUN
BIAS
VOUT VIN
VOUT1
INTVCC
EXTVCC
EXTVCC INTVCC
ITH
VIN
BG2
TG2
SW2
CS
TG1
SW1
BG1
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] 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
2
Wednesday, January 30, 2013
22
STEP UP/DOWN BATTERY CHARGER
LT
DAVID B.
N/A
LTC4000EGN /EGN-1, LTC3789EGN
DEMO CIRCUIT 1721B
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] 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
2
Wednesday, January 30, 2013
22
STEP UP/DOWN BATTERY CHARGER
LT
DAVID B.
N/A
LTC4000EGN /EGN-1, LTC3789EGN
DEMO CIRCUIT 1721B
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] 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
2
Wednesday, January 30, 2013
22
STEP UP/DOWN BATTERY CHARGER
LT
DAVID B.
N/A
LTC4000EGN /EGN-1, LTC3789EGN
DEMO CIRCUIT 1721B
J1
VIN
6V - 36V
J1
VIN
6V - 36V
R11
10
R11
10
E8
PLLIN E8 PLLIN
C13
1.8nF
1206
C13
1.8nF
1206
C10
2.2uF
C10
2.2uF
R21 121K 1%R21 121K 1%
C27 OPT C27 OPT
E9
EXTVCC E9 EXTVCC
+
CIN4 OPT
+
CIN4 OPT
R10 1.24K R10 1.24K Q5
SiR496DP
Q5
SiR496DP
4
51
2
36 7
8
U1
LTC3789EGN
U1
LTC3789EGN
VFB
1
SS
2
SENSE1+
3
SENSE1-
4
ITH
5
SGND
6
MODE/PLLIN
7
FREQ
8
RUN
9
VINSNS
10
VOUTSNS
11
ILIM
12
IOSENSE+
13
IOSENSE-
14 NC 15
SW2 16
TG2 17
BOOST2 18
BG2 19
EXTVCC 20
INTVCC 21
VIN 22
PGND1 24
BOOST1 25
SW1 27
PGOOD 28
TG1 26
BG1 23
R4 100R4 100
+
CIN2
56uF
50V
+
CIN2
56uF
50V
R18
0.008 2%
R18
0.008 2%
C2
25V
C2
25V
C7 OPTC7 OPT
C25
50V
C25
50V
R22 OPT R22 OPT Q10
OPT
Q10
OPT
C6
50V
C6
50V
C19
1000pF
C19
1000pF
E2 GND E2 GND
D2
BAS16
D2
BAS16
3 1
+
CIN3
OPT
+
CIN3
OPT
E7
SS E7 SS
R6 OPTR6 OPT
C12 390pF
1206
C12 390pF
1206
+
COUT2
150uF
20V
+
COUT2
150uF
20V
C1
22uF
C1
22uF
Q2
SiR422DP
Q2
SiR422DP
4
51
2
36 7
8
CF OPT CF OPT
+
COUT1
150uF
20V
+
COUT1
150uF
20V
D10
BZT52C5V6
D10
BZT52C5V6
12
D11
OPT
D11
OPT
1
2
R8
10
R8
10
R20
0.004
2%
R20
0.004
2%
C8
OPT
C8
OPT
C3C3
RFB2 8.06K RFB2 8.06K
R28
5.6
1206 R28
5.6
1206
C17
1210
C17
1210
C11
OPT
C11
OPT
+
CIN1
56uF
50V
+
CIN1
56uF
50V
C15
1uF
50V
C15
1uF
50V
CF1
OPT
CF1
OPT
E5
PGOOD E5 PGOOD
R29
3.6
1206
R29
3.6
1206
CSS
0.022uF
CSS
0.022uF
R12 OPT R12 OPT
E4
VLOGIC E4 VLOGIC
R1 5.6R1 5.6
R40 OPT R40 OPT
D7
DFLS160
D7
DFLS160
21
C4
0.22uF 16V
C4
0.22uF 16V
C22
0.22uF
16V
C22
0.22uF
16V
L1 4.7uH L1 4.7uH
C26 OPT C26 OPT
J2 GND J2 GND
R13 100 R13 100
Q4
SiR422DP
Q4
SiR422DP
4
51
2
36 7
8
E6
SGND E6 SGND
C23 OPT
16V 1210
C23 OPT
16V 1210
R41 OPT R41 OPT
E3
INTVCC E3 INTVCC
RFB1
154K
RFB1
154K
C34 0.01uF C34 0.01uF
R30 OPT R30 OPT
C9
3.3uF
50V 1210
C9
3.3uF
50V 1210
R7
100K
R7
100K
R5 15
0805
R5 15
0805
D6
B240A
D6
B240A
D5
B240A
D5
B240A
2 1
E1 VIN+ E1 VIN+
R2
0.008
2%
R2
0.008
2%
R61 OPT R61 OPT
R14
100
R14
100
R60 10KR60 10K
R27
OPT
R27
OPT
C16C16
JP2JP2
1
2
3
Q3
SiR496DP
Q3
SiR496DP
4
51
2
36 7
8
C24 1uF C24 1uF
R3 100R3 100
R9 1.24K R9 1.24K
C18 10uF
1206
C18 10uF
1206
R24
10K
R24
10K
R25
0
R25
0
C5
3.3uF
1210
C5
3.3uF
1210
D4 DFLS160 D4 DFLS160
2 1
C14
0.1uF
C14
0.1uF
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12
dc1721bf
DEMO MANUAL
DC1721B-A/DC1721B-B
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ●FAX: [phone] ●www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2013
LT 0313 • 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
Copyright © 2004, Linear Technology Corporation
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