LTC4120EUD-4.2 [Linear]
Wireless Power Receiver and 400mA Buck Battery Charger;
| 型号： | LTC4120EUD-4.2 |
| 厂家： | 
Linear |
| 描述： | Wireless Power Receiver and 400mA Buck Battery Charger 电池 无线 |
| 文件： | 总12页 (文件大小：960K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DEMO MANUAL
DC1969A-A/DC1969A-B
LTC4120EUD-4.2/LTC4120EUD
Wireless Power Receiver and
400mA Buck Battery Charger
DESCRIPTION
DemonstrationcircuitDC1969Aisakitof:theDC1967A‑A/B
LTC®4120EUD demonstration board, the DC1968A basic
wireless transmitter, a 35mm receiver ferrite disk, and
an assortment of different length standoffs. The basic
transmitter can deliver 2W to the receive board with up
to 10mm spacing between the transmit and the receive
coils.Thebasictransmitterdoesnotsupportforeignobject
detection, i.e. coins or other metallic objects.
Design files for this circuit board are available at
http://www.linear.com/demo/DC1969A
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.
CONTENTS
n
Kit Build Options
1X DC1967A‑A/B (LTC4120EUD) Demo Board
n
KIT NUMBER
DC1969A‑A
DC1969A‑B
Tx BOARD
DC1968A
DC1968A
Rx BOARD
DC1967A‑A
DC1967A‑B
1X DC1968A (Wireless Basic Transmitter) Demo Board
n
1X 35mm Ferrite Bead
n
4X 6.25mm (0.25") Nylon Standoffs
4X 12.5mm (0.50") Nylon Standoffs
n
Receiver Board Build Options
n
4X 15.875mm (0.625") Nylon Standoffs
Rx BOARD
DC1967A‑A
DC1967A‑B
PART NUMBER
FUNCTION
LTC4120EUD‑4.2
LTC4120EUD
Fixed 4.2V Float Voltage
Adjustable Float Voltage
PERFORMANCE SUMMARY Specifications are at TA = 25°C
SYMBOL
PARAMETER
CONDITIONS
MIN
8
TYP
MAX
38
UNITS
HVIN
DC1968A High Voltage Input Voltage Range
IHVIN ≤ 500mA at HVIN = 8V
V
V
V
V
DC1968A V Input Range
IV = 0mA to 700mA
4.75
2.5
370
5.25
4.25
400
CC
BAT
BAT
CC
CC
DC1967A BAT Pin Voltage
DC1967A BAT Pin Current
R9 = 1.40MΩ, R10 = 1.05MΩ
V
I
V
BAT
= 3.7V, DC1967A(R5) = 3.01kΩ
385
mA
Figure 1. DC1968A Basic Transmitter Board
Figure 2. DC1967A-B LTC4120 Receiver Board
dc1969aabfb
1
DEMO MANUAL
DC1969A-A/DC1969A-B
DEMO BOARD PROCEDURE
Refer to Figure 7 for the proper measurement equipment
setup and jumper settings and follow the procedure be‑
low. Please test DC1968A first, by itself.
1
4. Connect a bipolar supply (PS3) to the DC1967A demo
board BAT pin. Set the supply to 3.7V and turn on.
Observe AM3.
NOTE: When measuring the input or output voltage ripple,
care must be taken to avoid a long ground lead on the
oscilloscope probe. Measure the input or output voltage
5. Place the DC1967A board atop the DC1968A board, by
aligning:
DC1967A Mounting Hole DC1968A Mounting Hole
ripple by touching the probe tip directly across the V
CC
MH1
MH2
MH3
MH4
=>
=>
=>
=>
MH1
MH2
MH3
MH4
or V and GND terminals. See Figure 8 for proper scope
IN
probe technique.
1. Set PS1 = 36V, observe V (VM1) and I
AM1. The
HVIN
CC
CC
DC1968A can be powered by 5V on the V pin or up
to 38V on the HVIN pins. The HVIN pins are connected
to an LT3480 buck regulator that makes 5V at the V
Thisshouldresultinthetransmitantennabeingdirectly
above the receive antenna, with the centers aligned.
Observe AM2 and AM3. All the charge LEDs on the
DC1967Ashouldnowbelit.AM2shouldhaveincreased
from 100mA ~ 130mA to about 600mA. AM3 should
be reading 380mA ~ 400mA of charge current into the
battery emulator.
CC
pins. Standby power in the DC1968A basic transmitter
varies between 0.5W and 0.6W, for a V current at 5V
CC
of 100mA ~ 130mA. If the DC1968A is powered via the
HVIN pins then this current is scaled by the ratio 5V/
[V
× 0.92], where 0.92 is efficiency of the regula‑
HVIN
tor. So the standby HVIN current is approximately 5.5/
[V × (100mA ~ 130mA)].
HVIN
Figure 6 shows the approximate full power (400mA of
chargecurrentinto4.15V≈1.7W)andhalfpowercontours.
2. Remove PS1, VM1 and AM1. Attach PS2 and AM2.
1
3. Set PS2 to 5V, and observe AM2. The transmitter is
beingpowereddirectlywithnointerveningbuckregula‑
tor, so the standby current should be between 100mA
~ 130mA.
A bipolar supply can both sink and source current to maintain the correct
output voltage. A unipolar supply can be converted into a suitable bipolar
supply by putting a 3.6Ω, 10W, resistor across the output.
THEORY OF OPERATION
TheDC1969Akitdemonstratesoperationofadoubletuned
magnetically coupled resonant power transfer circuit.
The DC1968A basic transmitter is set to 130kHz operation
andtheDC1967ALTC4120demonstrationboardresonant
frequency is 127kHz with DHC enabled and 140kHz with
DHC disabled. For the DC1968A basic transmitter the
resonant components are the 2X 0.15µF PPE film capaci‑
tors (Cx1 and Cx2) and the 5.0µH (Lx) transmit coil. This
gives a resonant frequency of 129.95kHz. The tolerance
on the transmit coil and resonant capacitors is 2ꢀ, or
2.6kHz.InductorsL1andL2areusedtomaketheresonant
structure current fed.
DC1968A – Basic Transmitter
The DC1968A Basic Transmitter is used to transmit wire‑
less power and is used in conjunction with the DC1967A
wireless power receiver board featuring the LTC4120.
The DC1968A is configured as a current fed astable multi‑
vibrator, with oscillation frequency set by a resonant tank.
dc1969aabfb
2
DEMO MANUAL
DC1969A-A/DC1969A-B
THEORY OF OPERATION
I
BAT
V
= 3.7V
BAT
100µA/DIV
V
Cx-Cy
20V/DIV
V
Cx
10V/DIV
Cx TO GND
20V/DIV
V
Cy
10V/DIV
DC1969A F03
DC1969A F04
2µs/DIV
2µs/DIV
Figure 3. DC1968A Basic Transmitter
Figure 4. DC1967A Receiver
The current fed topology makes the peak‑to‑peak voltage
The waveforms in Figure 4 were captured at a transmit
to receive gap of 8mm. The blue trace is the waveform at
on the resonant tank equal to 2πV . V is 5V, so the
CC CC
peak‑to‑peak tank voltage is 31.5V, see Figure 3.
the C pin of the receiver board (Figure 10), and the red
X
trace is the charge current into the battery. Although the
transmit waveform is a sine wave, the series‑parallel con‑
nection of the secondary resonant circuit does not yield
a sine wave, and this waveform is correct. The charge
current into the battery has an average of ≈ 400mA, for a
The blue and green traces are the drains of the transmitter
MOSFETs M1 and M2 (see Figure 12), respectively. The
red trace is the difference (V – V ) of those two nodes,
CX
CY
and shows that the resonant tank is producing a sine
wave. The peak‑to‑peak voltage of 2πV = 31.5V, results
CC
delivered power of 1.5W (V
= 3.7V). However, 20mA
BAT
from the current fed topology. This in turn determines the
has been diverted to the charge LEDs, for a net battery
charge current of 380mA. The ripple on the charge current
is synchronous to the transmit waveform.
breakdown of the MOSFETS and diodes D2 and D3. To
increase transmit power by raising V , you must also
CC
change M1, M2, D2 and D3, to reflect the higher voltages
on the C and C nodes.
X
Y
DHC
Themagnitudeofthemagneticfieldisdirectlyproportional
to the current in the transmit coil. For a resonant system
this current is Q times the input current. So the higher the
Q the larger the magnetic field. Therefore the transmit coil
is constructed with Litz wire, and the resonant capacitors
are very low dissipation PPS film capacitors. This leads
to a Q of approximately 10 at 130kHz, and a circulating
When V is above 14V, the DHC pin is open and C2P
IN
doesn’t enhance the energy transfer; this is the detuned
state, and the resonant frequency of the receive tank is
142kHz.WhenV fallsbelow14V,theDHCpinisgrounded
IN
putting C2P in parallel with bothC2S and Lrthus changing
the resonant frequency to 127.4kHz. When the receiver
is tuned at 127.4kHz and drawing significant power, the
transmit frequency is pulled down to 127kHz. So, at full
power the system is now a double‑tuned resonant circuit.
Figure 6 shows approximate power transfer vs distance
between transmitter and receiver. Note the minimum
clearance. The minimum is needed to avoid exceeding
the maximum input voltage.
current of approximately 6A , at full load.
P‑P
DC1967A – Wireless Power Receiver Board Featuring
the LTC4120
The LTC4120 wireless power receiver IC implements
dynamic harmonization control (DHC), which tunes or
detunesthereceivecircuittoreceivemoreorlesspoweras
needed. The primary receive tank is composed of Lr, and
C2S, although it must be noted that C2S is ac grounded
through C5, the LTC4120 decoupling capacitor, to be
in parallel with Lr. C2S also serves to tap power off the
resonant circuit and send it to the LTC4120, see Figure 4.
Summary
TheLTC4120wirelesspowerreceiverICadjuststhereceiver
resonantfrequencytokeepthesystemfromtransferringtoo
much power when the coupling is high between transmit
dc1969aabfb
3
DEMO MANUAL
DC1969A-A/DC1969A-B
THEORY OF OPERATION
and receive coils. The LTC4120 wireless power receiver
IC increases power transfer when power transfer is insuf‑
ficient. This is accomplished by switching capacitors into
the resonant circuit using the DHC pin. This gives a much
wider operating transmit distance, see Figure 5.
distanceof8mm,tothebattery.Thereisnegligibletransmit
frequency ripple on V , and the voltage is well above the
IN
14VDHCvoltage.Thisindicatesthattheinputrectifiersare
operating in peak detect mode, and that DHC is inactive.
35mm Ferrite Disk
The DC1969A‑A/DC1969A‑B kit includes a 35mm ferrite
disk. The purpose of this disk is to increase the power
received by the DC1967A‑A/DC1967A‑B receiver board.
The 25mm ferrite disk that is shipped and attached to the
DC1967A‑A/DC1967A‑B board is attached with double‑
sided tape, and is likely to break if removed. Laying the
35mm ferrite on top of the shipped 25mm ferrite disc will
increase received power approximately 30ꢀ. Removing
the 25mm ferrite disk and attaching the 35mm disk will
increase received power approximately 20ꢀ. In both
cases the minimum clearance distance will increase to
approximately 3mm. Since the 25mm ferrite disk shipped
on the DC1967A‑A/DC1967A‑B board is likely to break,
exchanging disks can only be done once.
V
TO GND
5V/DIV
IN
I
BAT
V
= 3.7V
BAT
100mA/DIV
DC1969A F05
2µs/DIV
Figure 5. DC1967A Receiver
The blue trace is the charge current into the battery, and
the red trace is the voltage at V on the receiver board.
IN
IN
V
is about 25V, while the LTC4120 delivers 1.5W at a
½ Power
1mm
½ Power
Envelope
Full Power
Envelope
Full Power
1mm
DC1967A-B with
25mm Receive
Antenna
9mm
8mm
7mm
6mm
5mm
4mm
3mm
2mm
17mm
18mm
13mm
15mm
1mm Minimum Clearance
Transmit Antenna
DC1969A F06
Figure 6. Power Transfer vs Axial Distance and Misalignment
dc1969aabfb
4
DEMO MANUAL
DC1969A-A/DC1969A-B
THEORY OF OPERATION
+
–
+
–
PS1
8V to 38V Supply
1A
AM1
+
VM1
–
Figure 7a. Using High Voltage Input
+
–
PS2
5V Supply
1A
+
–
AM2
Figure 7b. Using the V Input
CC
+
–
+
–
PS3
AM3
3.7V Bipolar Supply
1A
Figure 7c. Receive Board with Battery Emulator
Figure 7
Note: All connections from equipment should be Kelvin connected directly
to the board pins which they are connected on this diagram and any input or
output leads should be twisted pair.
dc1969aabfb
5
DEMO MANUAL
DC1969A-A/DC1969A-B
THEORY OF OPERATION
Figure 8. Measuring Input or Output Ripple
60
50
CISPR 11 CLASS A LIMIT
40
CISPR 11 CLASS B LIMIT
1968A AND 1967A-B
30
20
10
1968A ONLY
0
1968A AND 1967A-B
AND BATT
–10
–20
10
100
FREQUENCY (MHz)
GTEM CELL MEASUREMENT
1,000
DC1969A F09
CORRECTED PER IEC 61000-4-20 TO 10m
DETECTOR = PEAK HOLD
RBW = 120kHz
VBW = 300kHz
SWEEP TIME = 680ms
# OF POINTS = 501
# OF SWEEPS ≥ 10
Figure 9. LTC4120 (DC1968A and DC1967A-B) Radiated Emissions
Radiated Emissions
ThebluelineshapeisdatagatheredfromaDC1968Abasic
transmitter operating alone and powered at V = 5V from
CC
Radiated emissions information was gathered using a
gigahertz transverse electromagnetic (GTEM) cell. The
GTEM cell dimensions were 0.2m × 0.2m × 0.15m. The
data was normalized to a 10m semi‑anechoic chamber
(SAC) per IEC61000‑4‑20 using peak hold detection.
a bench supply. The yellow line shape is data gathered
from a DC1968A basic transmitter powered at V = 5V
CC
from a bench supply, and energizing a DC1967A LTC4120
wireless power receive board with no battery. And the
green line shape is data gathered from a DC1968A basic
The limits shown on the graph are for CISPR 11 class A
(yellow) and class B (red). The CISPR 11 limits are ap‑
plicable to industrial commercial and medical equipment.
The emissions detection method was peak hold of the
square root of the sum of the emissions from each face,
X, Y, Z, squared. As the emissions are always at least 6dB
from the regulatory limits, the use of quasi‑peak detec‑
tion was not necessary. Data was gathered on a single
representative system.
transmitter powered at V = 5V from a bench supply, and
CC
energizing a DC1967A LTC4120 wireless power receive
board charging a Li‑Ion battery at 400mA.
The LTC4120 wireless power system is intended to be a
part of a complete end product. Only the complete end
productneedstobeFCCcertified. Thedatapresentedhere
on the wireless power system is for end product design
purposes only, not to obtain FCC certification.
dc1969aabfb
6
DEMO MANUAL
DC1969A-A/DC1969A-B
PARTS LIST
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
DC1967A Required Circuit Components
1
2
2
1
1
1
1
1
1
1
3
1
1
0
1
1
1
2
1
2
C2S1, C2P1
C2P2
C2S2
C1
CAP, CHIP, C0G, 0.0047µF, 5ꢀ, 50V, 0805
CAP, CHIP, C0G, 0.0018µF, 5ꢀ, 50V, 0603
CAP, CHIP, C0G, 0.022µF, 5ꢀ, 50V, 0805
CAP, CHIP, X5R, 10µF, 20ꢀ, 16V, 0805
CAP, CHIP, X5R, 47µF, 10ꢀ, 16V, 1210
CAP, CHIP, X7R, 0.01µF, 10ꢀ, 50V, 0603
CAP, CHIP, X5R, 2.2µF, 20ꢀ, 6.3V, 0402
CAP, CHIP, X7S, 10µF, 20ꢀ, 50V, 1210
DIODE, SCHOTTKY, 40V, 2A, PowerDI123
DIODE, Zener, 39V, 5ꢀ, 1W, PowerDI123
25mm Ferrite Bead
MURATA, GRM2165C1H472JA01D
KEMET, C0603C182J5GAC7533
MURATA, GRM21B5C1H223JA01L
TDK, C2012X5R1C106K
3
4
5
C2
MURATA, GRM32ER61C476KE15L
TDK, C1608X7R1H103K
6
C3
7
C4
MURATA, GRM155R60J225ME15D
TDK, C3225X7S1H106M
8
C5
9
D1, D2, D3
D4
DIODES, DFLS240L
10
11
12
13
14
15
16
17
18
DIODES, DFLZ39
FB1
ADAMS MAGNETICS, B67410‑A0223‑X195
EMBEDDED
Lr
IND, EMBEDDED, 47µH, 43 turns
L1
IND, SMT, 15µH, 260mΩ, 20ꢀ, 0.86A, 4mm × 4mm
RES, CHIP, 1.40M, 1ꢀ, 1/16W, 0402
RES, CHIP, 412kΩ, 1ꢀ, 1/16W, 0402
RES, CHIP, 10kΩ, 1ꢀ, 1/16W, 0402
RES, CHIP, 3.01kΩ, 1, 1/16W, 0402
RES, CHIP, 0Ω JUMPER, 1/16W, 0402
LPS4018‑153ML
R1
VISHAY, CRCW04021M40FKED
VISHAY, CRCW0402412KFKED
VISHAY, CRCW040210K0FKED
VISHAY, CRCW04023K01FKED
VISHAY, CRCW04020000Z0ED
R2
R3, R7
R5
R6, R8
Additional Demo Board Circuit Components
1
2
3
2
3
8
C7, C10
CAP, CHIP, X5R, 1µF, 10ꢀ, 16V, 0402
CAP, CHIP, X7R, 0.01µF, 10ꢀ, 25V, 0402
TDK, C1005X5R1C105K
TDK, C1005X7R1E103K
LITE‑ON, LTST‑C193KGKT‑5A
C6, C8, C9
D5, D6, D7, D8, D9, D10, DIODE, LED, GREEN, 0603
D11, D12
4
5
1
2
1
2
2
1
7
R4
RES, CHIP, 2kΩ, 5ꢀ, 1/16W, 0402
VISHAY, CRCW04022K00JNED
VISHAY, CRCW0402100KJNED
VISHAY, CRCW040210K0JNED
VISHAY, CRCW0402432RFKED
VISHAY, CRCW040222K6FKED
VISHAY, CRCW040234K8FKED
VISHAY, CRCW0402100KFKED
R11, R12
R13
RES, CHIP, 100kΩ, 5ꢀ, 1/16W, 0402
RES, CHIP, 10kΩ, 5ꢀ, 1/16W, 0402
RES, CHIP, 432Ω, 1ꢀ, 1/16W, 0402
RES, CHIP, 22.6kΩ, 1ꢀ, 1/16W, 0402
RES, CHIP, 34.8kΩ, 1ꢀ, 1/16W, 0402
RES, CHIP, 100kΩ, 1ꢀ, 1/16W, 0402
6
7
R14, R35
R15, R33
R16
8
9
10
R17, R18, R19, R20,
R21, R22, R23
11
12
1
8
R24
RES, CHIP, 49.9kΩ, 1ꢀ, 1/16W, 0402
RES, CHIP, 1kΩ, 5ꢀ, 1/16W, 0402
VISHAY, CRCW040249K9FKED
VISHAY, CRCW04021K00JNED
R25, R26, R27, R28,
R29, R30, R31, R32
13
14
1
2
R34
RES, CHIP, 787kΩ, 1ꢀ, 1/16W, 0402
VISHAY, CRCW0402787KFKED
LINEAR TECH., LTC1445CDHD
U2, U3
Ultralow Power Quad Comparators with Reference,
5mm × 4mm DFN‑16
Hardware For Demo Board Only
1
2
3
4
5
6
7
6
4
0
4
1
5
4
E1, E2, E5, E6, E9, E10
E3, E4, E7, E8
J1‑OPT
TURRET, 0.091"
MILL‑MAX, 2501‑2‑00‑80‑00‑00‑07‑0
MILL‑MAX, 2308‑2‑00‑80‑00‑00‑07‑0
HIROSE, DF3‑3P‑2DSA
TURRET, 0.061"
CONN, 3 Pin Polarized
HEADER, 3 Pin, SMT, 2mm
HEADER, 4 Pin, SMT, 2mm
SHUNT, 2mm
JP1, JP3‑JP5
JP2
SAMTEC, TMM‑103‑01‑L‑S‑SM
SAMTEC, TMM‑104‑01‑L‑S‑SM
SAMTEC, 2SN‑BK‑G
JP1‑JP5
CLEAR 0.085" × 0.335" BUMPER
KEYSTONE, 784‑C
dc1969aabfb
7
DEMO MANUAL
DC1969A-A/DC1969A-B
PARTS LIST
ITEM
QTY
15
4
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
3M, 34‑8705‑5578‑5
8
9
15mm DOUBLE SIDED TAPE
STAND‑OFF, NYLON, 0.375"
KEYSTONE, 8832
DC1967A-A Required Circuit Components
1
2
3
0
1
1
R9
NO LOAD. SMD 0402
R10
U1
RES, CHIP, 0Ω JUMPER, 1/16W, 0402
VISHAY, CRCW04020000Z0ED
LINEAR TECH., LTC4120EUD‑4.2
400mA Wireless Synchronous Buck Battery Charger,
3mm × 3mm QFN‑16
DC1967A-B Required Circuit Components
1
2
3
1
1
1
R9
RES, CHIP, 1.40M, 1ꢀ, 1/16W, 0402
RES, CHIP, 1.05M, 1ꢀ, 1/16W, 0402
VISHAY, CRCW04021M40FKED
VISHAY, CRCW04021M05FKED
LINEAR TECH., LTC4120EUD
R10
U1
400mA Wireless Synchronous Buck Battery Charger,
3mm × 3mm QFN‑16
DC1968A Required Circuit Components
1
2
1
2
1
1
1
1
1
2
2
1
2
1
1
2
1
1
2
2
1
1
2
1
1
CX1, CX2
C4, C5
C6
CAP, CHIP, PPS, 0.15µF, 2ꢀ, 50V, 6.0mm × 4.1mm
CAP, CHIP, X7R, 0.01µF, 10ꢀ, 50V, 0402
CAP, CHIP, X5R, 4.7µF, 10ꢀ, 50V, 1206
CAP, CHIP, X5R, 0.068µF, 10ꢀ, 50V, 0603
CAP, CHIP, C0G, 330pF, 5ꢀ, 50V, 0402
CAP, CHIP, X7R, 0.47µF, 10ꢀ, 25V, 0603
CAP, CHIP, X5R, 22µF, 20ꢀ, 6.3V, 0805
DIODE, ZENER, 16V, 350mW, SOT23
PANASONIC, ECHU1H154GX9
MURATA, GRM155R71H103KA88D
MURATA,GRM31CR71H475KA12L
MURATA, GRM188R71H683K
TDK, C1005C0G1H331J
3
4
C7
5
C8
6
C9
MURATA,GRM188R71E474K
TAIYO‑YUDEN,JMK212BJ226MG
DIODES, BZX84C16
7
C10
8
D1, D4
D2, D3
D5
9
DIODE, SCHOTTKY, 40V, 1A, 2DSN
ON SEMICONDUCTOR, NSR10F40NXT5G
DIODES, DFLS240L
10
11
12
13
14
15
16
17
18
19
20
21
22
23
DIODE, SCHOTTKY, 40V, 2A, PowerDI123
IND, SMT, 68µH, 0.41A, 0.40Ω, 20ꢀ, 5mm × 5mm
IND, SMT, 4.7µH, 1.6A, 0.125Ω, 20ꢀ, 4mm × 4mm
TRANSMIT COIL
L1, L2
L3
TDK, VLCF5028T‑680MR40‑2
COILCRAFT, LPS4018‑472M
TDK, WT‑505060‑8K2‑LT
Lx
M1, M2
M3
MOSFET, SMT, N‑CHANNEL, 60V, 11mΩ, SO8
MOSFET, SMT, P‑CHANNEL, ‑12V, 32mΩ, SOT23
VISHAY, Si4108DY‑T1‑GE3
VISHAY, Si2333DS
M4
MOSFET, SMT, N‑CHANNEL, 60V, 7.5Ω, 115mA, SOT23 ON SEMI, 2N7002L
R1, R2
R3, R8
R4
RES, CHIP,100Ω, 5ꢀ, 1/16W, 0402
RES, CHIP, 150kΩ, 5ꢀ, 1/16W, 0402
RES, CHIP, 40.2kΩ, 1ꢀ, 1/16W, 0402
RES, CHIP, 20kΩ, 1ꢀ, 1/16W, 0402
RES, CHIP, 100kΩ, 1ꢀ, 1/16W, 0402
RES, CHIP, 536kΩ, 1ꢀ, 1/16W, 0402
VISHAY, CRCW0402100RJNED
VISHAY, CRCW0402150JNED
VISHAY, CRCW040240K2FKED
VISHAY, CRCW040220K0FKED
VISHAY, CRCW0402100KFKED
VISHAY, CRCW0402536KFKED
LINEAR TECH., LT3480EDD
R5
R6, R10
R7
U1
LT3480EDD, PMIC 38V, 2A, 2.4MHz Step‑Down
Switching Regulator with 70µA Quiescent Current
Additional Demo Board Circuit Components
1
2
3
0
1
1
CX3‑OPT, CX4‑OPT
CAP, PPS, 0.15µF, 2.5ꢀ, 63Vac, MKS02
LED, GREEN, 0603
WIMA, MKS0D031500D00JSSD
LITE‑ON, LTST‑C190KGKT
D6
R9
RES, CHIP, 1kΩ, 5ꢀ, 1/16W, 0402
VISHAY, CRCW04021K00JNED
Hardware For Demo Board Only
1
2
3
6
40
4
E1‑E6
TURRET, 0.09 DIA
MILL‑MAX, 2501‑2‑00‑80‑00‑00‑07‑0
3M, 34‑8705‑5578‑5
40mm DOUBLE SIDED TAPE
STAND‑OFF, NYLON, 0.375"
KEYSTONE, 8832
dc1969aabfb
8
DEMO MANUAL
DC1969A-A/DC1969A-B
SCHEMATIC DIAGRAM
dc1969aabfb
9
DEMO MANUAL
DC1969A-A/DC1969A-B
SCHEMATIC DIAGRAM
E F R V -
8
9
E F R V -
8
9
dc1969aabfb
10
DEMO MANUAL
DC1969A-A/DC1969A-B
SCHEMATIC DIAGRAM
1
2
dc1969aabfb
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.
11
DEMO MANUAL
DC1969A-A/DC1969A-B
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:
Thisdemonstrationboard(DEMOBOARD)kitbeingsoldorprovidedbyLinearTechnologyisintendedforuseforENGINEERINGDEVELOPMENT
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
dc1969aabfb
LT 0215 REV B • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035‑7417
12
●
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LINEAR TECHNOLOGY CORPORATION 2014
(408) 432‑1900 FAX: (408) 434‑0507 www.linear.com
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