DEMO MANUAL
DC1969A-A/DC1969A-B
LTC4120EUD-4.2/LTC4120EUD
Wireless Power Receiver and
400mA Buck Battery Charger
DESCRIPTION
Demonstration circuit DC1969A is a kit of: the DC1967A‑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. The basic transmitter does not support foreign object
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
1X DC1967A-A/B (LTC4120EUD) Demo Board
n 1X DC1968A (Wireless Basic Transmitter) Demo Board
n 1X 35mm Ferrite Bead
n 4X 6.25mm (0.25") Nylon Standoffs
n 4X 12.5mm (0.50") Nylon Standoffs
n 4X 15.875mm (0.625") Nylon Standoffs
n
Kit Build Options
KIT NUMBER
Tx BOARD
Rx BOARD
DC1969A-A
DC1968A
DC1967A-A
DC1969A-B
DC1968A
DC1967A-B
Receiver Board Build Options
Rx BOARD
PART NUMBER
FUNCTION
DC1967A-A
LTC4120EUD-4.2
Fixed 4.2V Float Voltage
DC1967A-B
LTC4120EUD
Adjustable Float Voltage
PERFORMANCE SUMMARY
Specifications are at TA = 25°C
SYMBOL
PARAMETER
CONDITIONS
HVIN
DC1968A High Voltage Input Voltage Range
IHVIN ≤ 500mA at HVIN = 8V
VCC
DC1968A VCC Input Range
IVCC = 0mA to 700mA
VBAT
DC1967A BAT Pin Voltage
R9 = 1.40MΩ, R10 = 1.05MΩ
2.5
IBAT
DC1967A BAT Pin Current
VBAT = 3.7V, DC1967A(R5) = 3.01kΩ
370
Figure 1. DC1968A Basic Transmitter Board
MIN
TYP
MAX
UNITS
8
38
V
4.75
5.25
V
385
4.25
V
400
mA
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 below. Please test DC1968A first, by itself.
4. Connect a bipolar1 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
ripple by touching the probe tip directly across the VCC
or VIN and GND terminals. See Figure 8 for proper scope
probe technique.
5. Place the DC1967A board atop the DC1968A board, by
aligning:
1. Set PS1 = 36V, observe VCC (VM1) and IHVIN AM1. The
DC1968A can be powered by 5V on the VCC pin or up
to 38V on the HVIN pins. The HVIN pins are connected
to an LT3480 buck regulator that makes 5V at the VCC
pins. Standby power in the DC1968A basic transmitter
varies between 0.5W and 0.6W, for a VCC current at 5V
of 100mA ~ 130mA. If the DC1968A is powered via the
HVIN pins then this current is scaled by the ratio 5V/
[VHVIN × 0.92], where 0.92 is efficiency of the regula‑
tor. So the standby HVIN current is approximately 5.5/
[VHVIN × (100mA ~ 130mA)].
MH3 => MH3
2. Remove PS1, VM1 and AM1. Attach PS2 and AM2.
3. Set PS2 to 5V, and observe AM2. The transmitter is
being powered directly with no intervening buck regulator, so the standby current should be between 100mA
~ 130mA.
DC1967A Mounting Hole
DC1968A Mounting Hole
MH1 => MH1
MH2 => MH2
MH4 => MH4
This should result in the transmit antenna being directly
above the receive antenna, with the centers aligned.
Observe AM2 and AM3. All the charge LEDs on the
DC1967A should now be lit. AM2 should have increased
from 100mA ~ 130mA to about 600mA. AM3 should
be reading 380mA ~ 400mA of charge current into the
battery emulator.
Figure 6 shows the approximate full power (400mA of
charge current into 4.15V ≈ 1.7W) and half power contours.
1 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
The DC1969A kit demonstrates operation of a double tuned
magnetically coupled resonant power transfer circuit.
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.
2
The DC1968A basic transmitter is set to 130kHz operation
and the DC1967A LTC4120 demonstration board resonant
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 ±2%, or
2.6kHz. Inductors L1 and L2 are used to make the resonant
structure current fed.
dc1969aabfb
DEMO MANUAL
DC1969A-A/DC1969A-B
THEORY OF OPERATION
IBAT
VBAT = 3.7V
100µA/DIV
VCx-Cy
20V/DIV
VCx
10V/DIV
Cx TO GND
20V/DIV
VCy
10V/DIV
2µs/DIV
DC1969A F03
2µs/DIV
DC1969A F04
Figure 3. DC1968A Basic Transmitter
Figure 4. DC1967A Receiver
The current fed topology makes the peak-to-peak voltage
on the resonant tank equal to 2πVCC. VCC is 5V, so the
peak-to-peak tank voltage is 31.5V, see Figure 3.
The waveforms in Figure 4 were captured at a transmit
to receive gap of 8mm. The blue trace is the waveform at
the CX pin of the receiver board (Figure 10), and the red
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
delivered power of 1.5W (VBAT = 3.7V). However, 20mA
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.
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 (VCX – VCY) of those two nodes,
and shows that the resonant tank is producing a sine
wave. The peak-to-peak voltage of 2πVCC = 31.5V, results
from the current fed topology. This in turn determines the
breakdown of the MOSFETS and diodes D2 and D3. To
increase transmit power by raising VCC, you must also
change M1, M2, D2 and D3, to reflect the higher voltages
on the CX and CY nodes.
The magnitude of the magnetic field is directly proportional
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
current of approximately 6AP-P, at full load.
DC1967A – Wireless Power Receiver Board Featuring
the LTC4120
The LTC4120 wireless power receiver IC implements
dynamic harmonization control (DHC), which tunes or
detunes the receive circuit to receive more or less power as
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.
DHC
When VIN is above 14V, the DHC pin is open and C2P
doesn’t enhance the energy transfer; this is the detuned
state, and the resonant frequency of the receive tank is
142kHz. When VIN falls below 14V, the DHC pin is grounded
putting C2P in parallel with both C2S and Lr thus 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.
Summary
The LTC4120 wireless power receiver IC adjusts the receiver
resonant frequency to keep the system from transferring too
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.
VIN TO GND
5V/DIV
IBAT
VBAT = 3.7V
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 VIN on the receiver board.
VIN is about 25V, while the LTC4120 delivers 1.5W at a
distance of 8mm, to the battery. There is negligible transmit
frequency ripple on VIN, and the voltage is well above the
14V DHC voltage. This indicates that the input rectifiers are
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 doublesided 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 30%. Removing
the 25mm ferrite disk and attaching the 35mm disk will
increase received power approximately 20%. 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.
½ Power
±1mm
½ Power
Envelope
Full Power
Envelope
Full Power
±1mm
DC1967A-B with
25mm Receive
Antenna
9mm
8mm
7mm
6mm
17mm
5mm
4mm
13mm
3mm
18mm
2mm
15mm
1mm Minimum Clearance
Transmit Antenna
DC1969A F06
Figure 6. Power Transfer vs Axial Distance and Misalignment
4
dc1969aabfb
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 VCC Input
PS3
3.7V Bipolar Supply
1A
+
+
–
AM3
–
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
GND
VIN
Figure 8. Measuring Input or Output Ripple
60
50
CISPR 11 CLASS A LIMIT
40
CISPR 11 CLASS B LIMIT
dBµV/m
30
1968A AND 1967A-B
20
10
1968A ONLY
0
1968A AND 1967A-B
AND BATT
–10
–20
10
100
FREQUENCY (MHz)
GTEM CELL MEASUREMENT
CORRECTED PER IEC 61000-4-20 TO 10m
DETECTOR = PEAK HOLD
RBW = 120kHz
VBW = 300kHz
SWEEP TIME = 680ms
# OF POINTS = 501
# OF SWEEPS ≥ 10
1,000
DC1969A F09
Figure 9. LTC4120 (DC1968A and DC1967A-B) Radiated Emissions
Radiated Emissions
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.
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.
6
The blue line shape is data gathered from a DC1968A basic
transmitter operating alone and powered at VCC = 5V from
a bench supply. The yellow line shape is data gathered
from a DC1968A basic transmitter powered at VCC = 5V
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
transmitter powered at VCC = 5V from a bench supply, and
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
product needs to be FCC certified. The data presented here
on the wireless power system is for end product design
purposes only, not to obtain FCC certification.
dc1969aabfb
DEMO MANUAL
DC1969A-A/DC1969A-B
PARTS LIST
ITEM
QTY REFERENCE
DC1967A Required Circuit Components
1
2
C2S1, C2P1
2
1
C2P2
3
1
C2S2
4
1
C1
5
1
C2
6
1
C3
7
1
C4
8
1
C5
9
3
D1, D2, D3
10
1
D4
11
1
FB1
12
0
Lr
13
1
L1
14
1
R1
15
1
R2
16
2
R3, R7
R5
17
1
18
2
R6, R8
Additional Demo Board Circuit Components
1
2
C7, C10
2
3
C6, C8, C9
3
8
D5, D6, D7, D8, D9, D10,
D11, D12
1
R4
4
5
2
R11, R12
6
1
R13
7
2
R14, R35
8
2
R15, R33
9
1
R16
10
7
R17, R18, R19, R20,
R21, R22, R23
11
1
R24
12
8
R25, R26, R27, R28,
R29, R30, R31, R32
13
1
R34
14
2
U2, U3
Hardware For Demo Board Only
1
6
E1, E2, E5, E6, E9, E10
2
4
E3, E4, E7, E8
3
0
J1-OPT
4
4
JP1, JP3-JP5
5
1
JP2
6
5
JP1-JP5
7
4
PART DESCRIPTION
MANUFACTURER/PART NUMBER
CAP, CHIP, C0G, 0.0047µF, ±5%, 50V, 0805
CAP, CHIP, C0G, 0.0018µF, ±5%, 50V, 0603
CAP, CHIP, C0G, 0.022µF,±5%, 50V, 0805
CAP, CHIP, X5R, 10µF, ±20%, 16V, 0805
CAP, CHIP, X5R, 47µF, ±10%, 16V, 1210
CAP, CHIP, X7R, 0.01µF, ±10%, 50V, 0603
CAP, CHIP, X5R, 2.2µF, ±20%, 6.3V, 0402
CAP, CHIP, X7S, 10µF, ±20%, 50V, 1210
DIODE, SCHOTTKY, 40V, 2A, PowerDI123
DIODE, Zener, 39V, ±5%, 1W, PowerDI123
25mm Ferrite Bead
IND, EMBEDDED, 47µH, 43 turns
IND, SMT, 15µH, 260mΩ, ±20%, 0.86A, 4mm × 4mm
RES, CHIP, 1.40M, ±1%, 1/16W, 0402
RES, CHIP, 412kΩ, ±1%, 1/16W, 0402
RES, CHIP, 10kΩ, ±1%, 1/16W, 0402
RES, CHIP, 3.01kΩ, ±1, 1/16W, 0402
RES, CHIP, 0Ω JUMPER, 1/16W, 0402
MURATA, GRM2165C1H472JA01D
KEMET, C0603C182J5GAC7533
MURATA, GRM21B5C1H223JA01L
TDK, C2012X5R1C106K
MURATA, GRM32ER61C476KE15L
TDK, C1608X7R1H103K
MURATA, GRM155R60J225ME15D
TDK, C3225X7S1H106M
DIODES, DFLS240L
DIODES, DFLZ39
ADAMS MAGNETICS, B67410-A0223-X195
EMBEDDED
LPS4018-153ML
VISHAY, CRCW04021M40FKED
VISHAY, CRCW0402412KFKED
VISHAY, CRCW040210K0FKED
VISHAY, CRCW04023K01FKED
VISHAY, CRCW04020000Z0ED
CAP, CHIP, X5R, 1µF, ±10%, 16V, 0402
CAP, CHIP, X7R, 0.01µF, ±10%, 25V, 0402
DIODE, LED, GREEN, 0603
TDK, C1005X5R1C105K
TDK, C1005X7R1E103K
LITE-ON, LTST-C193KGKT-5A
RES, CHIP, 2kΩ, ±5%, 1/16W, 0402
RES, CHIP, 100kΩ, ±5%, 1/16W, 0402
RES, CHIP, 10kΩ, ±5%, 1/16W, 0402
RES, CHIP, 432Ω, ±1%, 1/16W, 0402
RES, CHIP, 22.6kΩ, ±1%, 1/16W, 0402
RES, CHIP, 34.8kΩ, ±1%, 1/16W, 0402
RES, CHIP, 100kΩ, ±1%, 1/16W, 0402
VISHAY, CRCW04022K00JNED
VISHAY, CRCW0402100KJNED
VISHAY, CRCW040210K0JNED
VISHAY, CRCW0402432RFKED
VISHAY, CRCW040222K6FKED
VISHAY, CRCW040234K8FKED
VISHAY, CRCW0402100KFKED
RES, CHIP, 49.9kΩ, ±1%, 1/16W, 0402
RES, CHIP, 1kΩ, ±5%, 1/16W, 0402
VISHAY, CRCW040249K9FKED
VISHAY, CRCW04021K00JNED
RES, CHIP, 787kΩ, ±1%, 1/16W, 0402
Ultralow Power Quad Comparators with Reference,
5mm × 4mm DFN-16
VISHAY, CRCW0402787KFKED
LINEAR TECH., LTC1445CDHD
TURRET, 0.091"
TURRET, 0.061"
CONN, 3 Pin Polarized
HEADER, 3 Pin, SMT, 2mm
HEADER, 4 Pin, SMT, 2mm
SHUNT, 2mm
CLEAR 0.085" × 0.335" BUMPER
MILL-MAX, 2501-2-00-80-00-00-07-0
MILL-MAX, 2308-2-00-80-00-00-07-0
HIROSE, DF3-3P-2DSA
SAMTEC, TMM-103-01-L-S-SM
SAMTEC, TMM-104-01-L-S-SM
SAMTEC, 2SN-BK-G
KEYSTONE, 784-C
dc1969aabfb
7
DEMO MANUAL
DC1969A-A/DC1969A-B
PARTS LIST
ITEM
QTY REFERENCE
8
15
4
9
DC1967A-A Required Circuit Components
1
0
R9
2
1
R10
3
1
U1
DC1967A-B Required Circuit Components
1
1
R9
2
1
R10
3
1
U1
DC1968A Required Circuit Components
1
1
CX1, CX2
2
2
C4, C5
3
1
C6
4
1
C7
5
1
C8
6
1
C9
7
1
C10
8
2
D1, D4
2
D2, D3
9
10
1
D5
11
2
L1, L2
12
1
L3
13
1
Lx
2
M1, M2
14
15
1
M3
16
1
M4
17
2
R1, R2
18
2
R3, R8
19
1
R4
20
1
R5
21
2
R6, R10
22
1
R7
23
1
U1
Additional Demo Board Circuit Components
1
0
CX3-OPT, CX4-OPT
2
1
D6
3
1
R9
Hardware For Demo Board Only
6
E1-E6
1
2
40
3
4
8
PART DESCRIPTION
15mm DOUBLE SIDED TAPE
STAND-OFF, NYLON, 0.375"
MANUFACTURER/PART NUMBER
3M, 34-8705-5578-5
KEYSTONE, 8832
NO LOAD. SMD 0402
RES, CHIP, 0Ω JUMPER, 1/16W, 0402
400mA Wireless Synchronous Buck Battery Charger,
3mm × 3mm QFN-16
VISHAY, CRCW04020000Z0ED
LINEAR TECH., LTC4120EUD-4.2
RES, CHIP, 1.40M, ±1%, 1/16W, 0402
RES, CHIP, 1.05M, ±1%, 1/16W, 0402
400mA Wireless Synchronous Buck Battery Charger,
3mm × 3mm QFN-16
VISHAY, CRCW04021M40FKED
VISHAY, CRCW04021M05FKED
LINEAR TECH., LTC4120EUD
CAP, CHIP, PPS, 0.15µF, ±2%, 50V, 6.0mm × 4.1mm
CAP, CHIP, X7R, 0.01µF, ±10%, 50V, 0402
CAP, CHIP, X5R, 4.7µF, ±10%, 50V, 1206
CAP, CHIP, X5R, 0.068µF, ±10%, 50V, 0603
CAP, CHIP, C0G, 330pF, ±5%, 50V, 0402
CAP, CHIP, X7R, 0.47µF, ±10%, 25V, 0603
CAP, CHIP, X5R, 22µF, ±20%, 6.3V, 0805
DIODE, ZENER, 16V, 350mW, SOT23
DIODE, SCHOTTKY, 40V, 1A, 2DSN
DIODE, SCHOTTKY, 40V, 2A, PowerDI123
IND, SMT, 68µH, 0.41A, 0.40Ω, ±20%, 5mm × 5mm
IND, SMT, 4.7µH, 1.6A, 0.125Ω, ±20%, 4mm × 4mm
TRANSMIT COIL
MOSFET, SMT, N-CHANNEL, 60V, 11mΩ, SO8
MOSFET, SMT, P-CHANNEL, -12V, 32mΩ, SOT23
MOSFET, SMT, N-CHANNEL, 60V, 7.5Ω, 115mA, SOT23
RES, CHIP,100Ω, ±5%, 1/16W, 0402
RES, CHIP, 150kΩ, ±5%, 1/16W, 0402
RES, CHIP, 40.2kΩ, ±1%, 1/16W, 0402
RES, CHIP, 20kΩ, ±1%, 1/16W, 0402
RES, CHIP, 100kΩ, ±1%, 1/16W, 0402
RES, CHIP, 536kΩ, ±1%, 1/16W, 0402
LT3480EDD, PMIC 38V, 2A, 2.4MHz Step-Down
Switching Regulator with 70µA Quiescent Current
PANASONIC, ECHU1H154GX9
MURATA, GRM155R71H103KA88D
MURATA,GRM31CR71H475KA12L
MURATA, GRM188R71H683K
TDK, C1005C0G1H331J
MURATA,GRM188R71E474K
TAIYO-YUDEN,JMK212BJ226MG
DIODES, BZX84C16
ON SEMICONDUCTOR, NSR10F40NXT5G
DIODES, DFLS240L
TDK, VLCF5028T-680MR40-2
COILCRAFT, LPS4018-472M
TDK, WT-505060-8K2-LT
VISHAY, Si4108DY-T1-GE3
VISHAY, Si2333DS
ON SEMI, 2N7002L
VISHAY, CRCW0402100RJNED
VISHAY, CRCW0402150JNED
VISHAY, CRCW040240K2FKED
VISHAY, CRCW040220K0FKED
VISHAY, CRCW0402100KFKED
VISHAY, CRCW0402536KFKED
LINEAR TECH., LT3480EDD
CAP, PPS, 0.15µF, ±2.5%, 63Vac, MKS02
LED, GREEN, 0603
RES, CHIP, 1kΩ, ±5%, 1/16W, 0402
WIMA, MKS0D031500D00JSSD
LITE-ON, LTST-C190KGKT
VISHAY, CRCW04021K00JNED
TURRET, 0.09 DIA
40mm DOUBLE SIDED TAPE
STAND-OFF, NYLON, 0.375"
MILL-MAX, 2501-2-00-80-00-00-07-0
3M, 34-8705-5578-5
KEYSTONE, 8832
dc1969aabfb
1
2
3
4
PROG
E4
E3
E2
E1
NTC
GND
Cx
5%
R4
2.0k
4
VPROG
Lr
47µH
Embedded
Inductor
43T
CONNECTED
DISCONNECTED
EMBEDDED INDUCTOR
4
JP1
C2P1
4700pF
5%
50V
0805
C2S1
4700pF
5%
50V
0805
C2P2
1800pF
5%
50V
0603
C2S2
0.022µF
5%
50V
0805
D2
DFLS240L
D1
DFLS240L
D3
DFLS240L
3
3
R7
10k
R6
0
EXT
R5
3.01k
PROG
BATSNS/FB
10
13
NTC
DHC
FREQ
RUN
12
6
7
16
5
GND
3
IN
17
GND
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
2
C5
10µF
50V
1210
-B
ASSY
-A
*
11
9
8
4
2
1
15
14
R12
100k
5%
6.3V
C4
2.2µF
INTVCC
NC
GEORGE B.
APP ENG.
TECHNOLOGY
VIN
GND
1
2
3
DF3-3P-2DSA
BAT
GND
ENTC
J1
OPT
BAT
2.7 V - 11V
C2
400mA
47uF
16V
1210 E5
GND
VBAR
nCHRG
nFAULT
E6
E7
E8
E9
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
0 Ohm
1.05MEG
R10
R8
0
DATE
9 - 17- 13
5V - 40V
E10
GEORGE B.
APPROVED
DATE:
N/A
SIZE
1
SHEET 1
LTC4120EUD - 4.2 / LTC4120EUD
DEMO CIRCUIT 1967A - A / B
9 - 17 - 13
IC NO.
OF
2
2
REV.
400mA WIRELESS SYNCHRONOUS BUCK BATTERY CHARGER
TITLE: SCHEMATIC
LTC4120EUD
R9
R10 *
OPEN
1.40MEG
R9 *
U1
PCB DES.
SCALE = NONE
L1
15.0uH
R11
100k
5%
PRODUCTION FAB
2
1
DESCRIPTION
REVISION HISTORY
REV
R10 TO BE CONNECTED TO " BAT "
NODE AT BAT TURRET (E6)
C1
10uF
16V
0805
0603
C3
0.01µF
-
ECO
LTC4120 - 4.2EUD
APPROVALS
NC/FBG
BAT
CHGSNS
SW
BOOST
INTVCC
FAULT
CHRG
U1
LTC4120EUD-4.2 / LTC4120EUD
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.
CUSTOMER NOTICE
UNLESS NOTED:
RESISTORS: OHMS, 0402, 1%, 1/16W
CAPACITORS: uF, 0402, 10%, 50V
1.5 MHz
750 kHz
JP3
FREQ
R2
412k
D4
DFLZ39
39V
Figure 10. DC1967A Circuit Schematic
INT
JP4
NTC
10k
R3
INTVCC
JP2
RUN
ON
VIN > 11V
OFF
R1
1.40MEG
2
1
2
3
4
DEMO MANUAL
DC1969A-A/DC1969A-B
SCHEMATIC DIAGRAM
dc1969aabfb
9
1
2
3
8
V-REF
9
4
JP5
ENABLE
1.221V
LTC1445CDHD
U2E
VPROG
VBAR
C7
1µF
10V
R14
432
5%
DISABLE
R13
10k
4
4
R24
49.9k
R23
100k
R22
100k
R21
100k
R20
100k
R19
100k
R18
100k
R17
100k
R16
34.8k
R15
22.6k
C6
0.01µF
C8
0.01µF
U3.3
C9
0.01µF
U2.3
787k
R34
R33
22.6k
3
C10
1µF
10V
R35
432
LTC1445CDHD
U3D
U3C
LTC1445CDHD
U3B
LTC1445CDHD
1.186V
U3A
LTC1445CDHD
U2D
LTC1445CDHD
LTC1445CDHD
U2C
1.186V
LTC1445CDHD
U2B
LTC1445CDHD
U2A
3
12
13
10
11
6
7
4
5
12
13
10
11
6
7
4
5
8
V-REF
10
9
MONITOR
15
16
1
2
15
16
1
2
D5
D6
D7
D8
D9
D10
D11
D12
2
2
2
2
2
2
2
2
6%
19%
31%
44%
56%
69%
81%
94%
CHG CURRENT
2
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
CUSTOMER NOTICE
1
1
1
1
1
1
1
1
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.
5%
R25
1k
5%
R26
1k
5%
R27
1k
5%
R28
1k
5%
R29
1k
5%
R30
1k
5%
R31
1k
5%
R32
1k
2
GEORGE B.
SCALE = NONE
NC
PCB DES.
APP ENG.
APPROVALS
Figure 11. DC1967A Circuit Schematic
LTC1445CDHD
U3E
149 17
3
149 17
3
149 17
3
149 17
3
149 17
3
149 17
3
149 17
3
149 17
3
TECHNOLOGY
1
SHEET 2
LTC4120EUD - 4.2 / LTC4120EUD
DEMO CIRCUIT 1967A-A/B
9 - 17 - 13
IC NO.
BAR GRAPH FOR 400mA WIRELESS SYNCHRONOUS
BUCK BATTERY CHARGER
DATE:
N/A
SIZE
TITLE: SCHEMATIC
OF
2
2
REV.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
UNLESS NOTED:
RESISTORS: OHMS, 0402, 1%, 1/16W
CAPACITORS: uF, 0402, 10%, 50V
1
1
2
3
4
DEMO MANUAL
DC1969A-A/DC1969A-B
SCHEMATIC DIAGRAM
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.
1
2
3
4
VCC
GND
E4
E3
4.75V - 5.25V
GND
E2
HVIN
8V - 38V
C7
0.068uF
50V
0603
5%
R3
150k
C6
4.7uF
50V
1206
4
R4
40.2k
4
RT
FB
8
SYNC
RUN/SS
10
6
5
4
11
GND
VIN
Vc
PG
SW
BOOST
BD
9
7
3
2
1
U1
LT3480EDD
5%
C8
330pF
R5
20k
C9
0.47uF
25V
0603
1
L3
4.7uH
R9
1K
5%
D6
ON
D5
DFLS240L
40V
2A
3
3
M1
Si4108DY-T1-GE3
2
E1
4
1
5%
R8
150k
2
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
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.
SCALE = NONE
APP ENG.
4
123
8765
-
ECO
TECHNOLOGY
DATE
Cx
E5
Cy
Lx
5.0uH
5%
E6
9 - 17 - 13
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
UNLESS NOTED:
RESISTORS: OHMS, 0402, 1%, 1/16W
CAPACITORS: uF, 0402, 10%, 50V
M2
Si4108DY-T1-GE3
Cx2
0.15uF
2%
FC6041
Cx4
0.15uF
2.5%
MKS02
OPT
GEORGE B.
APPROVED
9 - 17 - 13
IC NO.
1
LTC4120EUD-4.2 / LTC4120EUD
DEMO CIRCUIT 1968A
SHEET 1
OF
1
3
REV.
BASIC INDUCTIVE TRANSMITTER WITH PRE - REGULATOR
DATE:
N/A
SIZE
Cx1
0.15uF
2%
FC6041
Cx3
0.15uF
2.5%
MKS02
OPT
PRODUCTION FAB
3
1
DESCRIPTION
REVISION HISTORY
REV
NC
GEORGE B. TITLE: SCHEMATIC
APPROVALS
D4
BZX84C16
16V
PCB DES.
5%
R2
C5
0.01uF
100
5%
L2
68uH
D3
NSR10F40NXT5G
M3
Si2333DS
R1
M4
2N7002L
2
3
100
2
3
R10
100k
1
CUSTOMER NOTICE
D1
BZX84C16
16V
C4
0.01uF
D2
NSR10F40NXT5G
L1
68uH
6.3V
0805
20%
C10
22uF
Figure 12. DC1968A Circuit Schematic
321
5678
R6
100k
R7
536k
5V OUT
2
1
2
3
4
DEMO MANUAL
DC1969A-A/DC1969A-B
SCHEMATIC DIAGRAM
dc1969aabfb
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:
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
12 Linear Technology Corporation
dc1969aabfb
LT 0215 REV B • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
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