DC2386A - Demo Manual

DEMO MANUAL
DC2386A-A/DC2386A-B
LTC4125EUFD and
LTC4120EUD Wireless Power Transfer
Battery Charger Demonstration Kit
DESCRIPTION
Demonstration kit DC2386A is a kit of the DC2330A
LTC®4125EUFD demonstration board, the DC2445A-A/
DC2445A-B LTC4120EUD demonstration board, and an
assortment of different length standoffs. The DC2330A
can deliver up to 1.68W to the receive board with up to
12mm spacing between the transmit and receive coils. The
DC2330A transmitter supports Foreign Object Detection
via the LTC4125.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2386A
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
1 × DC2330A (LTC4125EUFD) Demo Board
1 × DC2445A-A/DC2445A-B (LTC4120EUD) Demo board (with 12.5mm (0.5") Nylon Standoffs, 8.25mm Gap), see Figure 3
4 × 6.25mm (0.25˝) Nylon Standoffs (2.0mm Gap)
4 × 9.5mm (0.375˝) Nylon Standoffs (5.25mm Gap)
4 × 15.9mm (0.625˝) Nylon Standoffs (11.65mm Gap)
Kit Build Options
KIT NUMBER
TX BOARD
DC2386A-A
DC2330A
DC2386A-B
DC2330A
LTC TX PART NUMBER
RX BOARD
LTC RX PART NUMBER
RX OPTION
LTC4125EUFD
DC2445A-A
LTC4120EUD-4.2
Fixed 4.2V Float Voltage
LTC4125EUFD
DC2445A-B
LTC4120EUD
Adjustable Float Voltage
PERFORMANCE SUMMARY
Specifications are at TA = 25°C
SYMBOL
PARAMETER
CONDITIONS
VIN
DC2330A Voltage Input
IVIN ≤ 2.5A
IVIN
DC2330A VIN Current
VIN = 5V
MIN
3
VBAT
DC2445A-A BAT Pin Voltage
VBAT
DC2445A-B BAT Pin Voltage
R9 = 1.40MΩ, R10 = 1.05MΩ
4.15
IBAT
DC2445A BAT Pin Current
VBAT = 3.7V, DC2445A-A/DC2445A-B(R5) = 3.01kΩ
AIR GAP
Separation Between LTX and LRX
IBAT = 400mA (Figure 3)
Figure 1. DC2330A Picture
TYP
4.2
MAX
5.5
V
2.0
A
4.25
V
4.2
370mA
385mA
UNITS
V
400mA
8.25
A
mm
Figure 2. DC2445A-A/DC2445A-B Picture
dc2386aabfa
1
DEMO MANUAL
DC2386A-A/DC2386A-B
QUICK START PROCEDURE
Refer to Figure 4 for the proper measurement equipment setup and jumper settings, DC2445A mounting on
DC2330A, and follow the procedure below.
lighting up sequentially. When a valid load is found the
LED sweeping will freeze until the next search period,
≈ 3.7s later. Note that the last LED, the red LED, should
not normally be lit.
NOTE. When measuring the input or output voltage ripple,
care must be taken to avoid a long ground lead on the Observe AM1 and AM2. AM2 should have increased
from ≈10mA RMS, 250mA peak to about 600mA. AM1
oscilloscope probe. Measure the input or output voltage
should be reading 380mA ~ 400mA of charge current
ripple by touching the probe tip directly across the VCC
or VIN and GND terminals. See Figure 5 for proper scope
into the battery emulator. All the charge LEDs on the
probe technique.
DC2445A-X should now be lit.
1. Place the DC2445A-A/DC2445A-B board atop the If the DC2445A-X board is receiving power, it will atDC2330A board, by aligning: (See Figure 4)
tempt to charge the battery. Again this is evinced by
the green LEDs lighting. If all the green LEDs are lit,
DC2330A Mounting Hole
DC2445A-A/B MH
the LTC4120EUD, on the DC2445A, is charging at the
MH3=>MH1
full programmed battery charge current.
MH2=>MH2
3. The LTC4125EUFD on the DC2330A, keeps the transmit
power at slightly more than the load requires for ≈ 3.7s,
MH4=>MH3
then searches again. This is why the blue LEDs on the
MH6=>MH4
DC2330A go out and start ramping up again.
This should result in the transmit antenna being directly 4. When the system is operating correctly, slide a piece of
above the receive antenna, with the centers aligned.
blank PCB*, or coin between the transmit and receive
The standoffs on the DC2445A-A/DC2445A-B are
coils. The transmit current should immediately drop to
0.5"(12.5mm) when shipped. This results in an air gap
0A. This is the Foreign Object Detection in operation,
of 8.25mm (See Figure 3). The DC2386A kit ships with
preventing a foreign object from getting hot.
three additional standoff sizes. This allows the air gap
to be varied from 0.083" (~2.0mm) to 0.46" (~11.6mm). 5. Please change the standoffs on the DC2445A-A/
DC2445A-B board to yield the air gap most appropriate
2. Set PS1 = 3.7V, PS2 = 5V, and enable the power supfor your project.
plies. The DC2330A should start sweeping the LTX cur- *Testing with a blank PCB of at least 10cm2 (1.5 IN2) of copper.
rent looking for a load. This is evinced by the blue LEDs
F01
LRX EMBEDDED
IN PCB
DC2445 PCB
4×12.5mm (0.5 INCH)
STANDOFFS
8.25mm
12.5mm
LTX
DC2330 PCB
4.25mm
Figure 3. As Shipped Demo Kit Air Gap
2
dc2386aabfa
DEMO MANUAL
DC2386A-A/DC2386A-B
QUICK START PROCEDURE
+
PS1
+
3.7V BIPOLAR SUPPLY
±1A
–
–
AM1
CONNECTING THE DC2445A-A/DC2445A-B
PS2
5V SUPPLY
1A
+
–
+
–
AM2
CONNECTING THE DC2330A
PS2
5V SUPPLY
1A
+
–
+
–
AM2
+
PS1
+
3.7V BIPOLAR SUPPLY
±1A
–
–
AM1
DC2445A-A/DC2445A-B MOUNTED ON TOP OF DC2330A
Figure 4. Equipment Setup for DC2386A–A/DC2386A–B Kit
Figure 5. Measuring Input or Output Ripple
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.
dc2386aabfa
3
DEMO MANUAL
DC2386A-A/DC2386A-B
THEORY OF OPERATION
The DC2386A kit demonstrates operation of a magnetically coupled resonant Wireless Power Transfer (WPT)
system. The LTC4125EUFD transmitter searches for a
suitable load, and powers it until the next search period.
The LTC4120EUD battery charger uses DHC to control its
input power ensuring full power charging under a variety
of operating conditions.
DC2330A – Wireless Power Transmitter Board
featuring the LTC4125EUFD
The DC2330A Wireless Power Transmitter is used to power
a load wirelessly. In this kit, it is used in conjunction with
the DC2445A-X Wireless Power Receiver Board to charge
a Li-Ion battery.
The LTC4125EUFD implements an AutoResonant drive of
the series resonant tank composed of LTX (See LTX Table 1
for a list of tested LTX coils) and CTX (See DC2330A Schematic on page 12). The AutoResonant drive uses a zero
crossing detector to determine the resonant frequency
of the series LC circuit. All subsequent duty cycles discussed here use the resonant period determined by the
AutoResonant circuitry.
The SW1 and SW2 pins each have a half bridge drive. At
zero current crossing, whichever SWX pin has current flowing out of the pin, is set to VIN for a duty cycle determined
by the corresponding PTHX pin (see Figure 10). When the
SWX pin is set to VIN, it increases the current flowing in
the transmitter series resonant LC circuit. The absolute
value of the tank current is determined by the resonant tank
components and also by the reflected load impedance.
The LTC4125EUFD sweeps the duty cycle by way of a 5
bit DAC that sets the PTHX voltage, and hence duty cycle.
The FB pin is driven by the node forming the junction of
the transmit coil, LTX, and the transmit capacitor, CTX.
The voltage at this node is proportional to the circulating
current in the transmitter resonant tank (see Figure 8).
The LTC4125EUFD monitors the FB pin and when a valid
exit condition is found, stops incrementing the PTH VDAC.
The PTH VDAC is held at the detection level for the rest
of the sweep cycle. Some exit conditions are adjustable
by the user, and some are proprietary and not adjustable.
As load power requirements may change or foreign objects may enter the WPT transfer field, the LTC4125EUFD
periodically repeats the sweep as described above. Several
of the components of the sweep period are adjustable,
but the DC2330A sets the overall sweep period to about
3.7s (see Figure 9).
The AutoResonant detect circuity will shift the transmitter
frequency for some fault conditions, particularly Foreign
Object Detection (FOD).
Table 1. Tested LTX Coils
Vendor
Part Number
Würth
760308100110
Inter-Technical
Sunlord
4
L4000T02
SWA50N50H35C05B
URL
http://www.we-online.com
http://www.inter-technical.com/index.php?page=products#
http://www.sunlordinc.com/
dc2386aabfa
DEMO MANUAL
DC2386A-A/DC2386A-B
THEORY OF OPERATION
Figure 6. Coil Side of Transmit Coil, LTX
Figure 7. Backside of Transmit Coil, LTX
Figure 8. FB ∝ I(LTX), Lt. Blue = LTC4125.FB, Grn. = I(LTX)
Figure 9. Dk. Blue = V(PTH), Lt. Blue = LTC4125.FB,
Pk. = V(PROG), Grn. = LTC4120.IN
dc2386aabfa
5
DEMO MANUAL
DC2386A-A/DC2386A-B
THEORY OF OPERATION
Figure 10. Dk. Blue = LTC4125.SW1,
Lt. Blue = LTC4125.SW2, Grn. = I(LTX)
Figure 11. Dk. Blue = LTC4120.IN, Grn. = I(BAT)
The LTC4125EUFD also monitors the FB for fault conditions
and terminates the sweep if one is detected.
ferrite shield temperature, especially on the distal surface
of the ferrite shield.
Thermal Shutdown
Figure 6 is a thermal image of the coil side of the Wurth
760308100110 transmit coil at 42.0°C, and Figure 7 is a
thermal image of the backside of the same coil at 41.7°C.
Figure 7 is was taken in free air, after heating the coil while
in contact with the DC2330A PCB. The NTC is located in
hole N, which is aligned with the ring of max temperature,
on the backside of the transmit coil, LTX.
The LTC4125 needs to produce a large magnetic field in
LTX, in order to transfer as much power as possible. The
magnetic field is proportional to the current flowing in
LTX, and the RMS value of the current flowing in LTX will
dissipate any power not transferred to the load.
The LTC4125 uses an NTC resistor to monitor the temperature of LTX and shut off the transmit power if the NTC
reports a temperature higher than ≈ 42°C. Please see the
applications section of the data sheet for more detailed
information.
Transmit coils are often quite large and bulky, composed
of the windings and a very usually a ferrite shield. It is
undesirable to place the temperature monitoring NTC
resistor on the windings. This is because the winding are
radiating power, and the NTC resistor and wires form a
loop. If this loop is immediately adjacent to the transmit
coil windings, it will pick up significant voltage and apply
it to the LTC4125 NTC pin.
The ideal place for the NTC would be on the side of the
transmit coil distal to the windings. Therefore it is necessary
to study the relationship between winding temperature and
6
These thermal images are very specific to the Wurth
760308100110 transmit coil and PCB mount. This study
should be repeated for any application circuit, using a
different transmit coil to ensure proper NTC placement.
DC2445A-A/DC2445A-B – Wireless Power Receiver
Board featuring the LTC4120EUD
The DC2445A-A/DC2445A-B demo board implements
a series resonant LC circuit. The AC waveform on the
resonant circuit is rectified and applied to the IN pin
of the LTC4120EUD Wireless power receiver IC. The
Undervoltage Current limit (UVCL) of the LTC4120EUD
is at ≈ 12V. So, when VIN exceeds the UVCL threshold,
the LTC4120EUD tries to charge a battery on its BAT
pin. The LTC4120EUD also has Dynamic Harmonization
Control (DHC), which can be used to tune or detune the
dc2386aabfa
DEMO MANUAL
DC2386A-A/DC2386A-B
THEORY OF OPERATION
Figure 12. Power Transfer vs Axial Distance and Misalignment
dc2386aabfa
7
DEMO MANUAL
DC2386A-A/DC2386A-B
THEORY OF OPERATION
receive circuit to receive more or less power as needed.
The DC2445A-X is designed to work with the DC2330A
wireless power transmitter board. The LTC4125EUFD on
the DC2330A is already searching for an appropriate load
so the DHC loop has been repurposed on the DC2445A
demo board to provide presence detect.
DHC
Because the LTC4125EUFD on the DC2330A wireless power
transmitter already searches for an appropriate load, the
DHC loop on the DC2445A has been repurposed. When
VIN is above 14V, the DHC pin is high impedance, and
when it is below 14V it is grounded through a MOSFET.
The receive tank is tuned to a fixed 127kHz, and on the
DC2445A-X the DHC does not change this frequency. On
the DC2445A-X the DHC pin is used to activate a 15V clamp.
The assertion of this clamp signals the LTC4125, on the
DC2330A board, that it is transmitting sufficient power.
The Battery Charger
The battery charger is a current mode buck regulator from
IN to BAT. The current in the switching inductor (L1) is
monitored by an on die current sense resistor between
the CHGSNS and BAT pins.
This current is used for cycle by cycle PWM duty cycle
determination, and averaged to indicate battery charge
current.
The charger is a full featured CC-CV charger, with low battery trickle charge (See Figure 11). The Charge Voltage is
fixed at 4.2V for the LTC4120EUD-4.2, and programmable
on the LTC4120EUD. The charge current is programmed
by the resistor on the PROG pin, R5 on the DC2445A-X.
Summary
The DC2386A Wireless Power Transfer Battery Charger Demonstration Kit allows full exploration of
the LTC4125EUFD Wireless Power Transmitter and
LTC4120EUD Wireless Power battery charger.
The DC2386A makes it possible to determine how the
LTC4125EUFD identifies a valid load or foreign object.
8
dc2386aabfa
DEMO MANUAL
DC2386A-A/DC2386A-B
PARTS LIST
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
DC2330A Required Circuit Components
1
1
CTX
CAP, CHIP, C0G, 0.1µF, ±5%, 100V, 1206
TDK, C3216C0G2A104J160AC
2
2
C4, C5
CAP, CHIP, X7R, 0.01µF, ±10%, 50V, 0402
TDK, C1005X7R1H103K050BB
3
1
C6
CAP, CHIP, X7R, 4700pF, ±10%, 50V, 0402
MURATA, GRM155R71H472KA01
4
1
C7
CAP, CHIP, C0G, 470pF, ±10%, 50V, 0402
KEMET, C0402C471K5GACTU
5
1
C8
CAP, CHIP, X5R, 0.1μF, ±10%, 25V, 0402
TDK, C1005X5R1E104K050BC
6
1
C9
CAP, CHIP, X7R, 0.1µF, ±10%, 100V, 0603
MURATA, GRM188R72A104KA35D
7
1
C10
CAP, CHIP, X5R, 1µF, ±10%, 16V, 0402
TDK, C1005X5R1C105K050BC
8
2
C11, C12
CAP, CHIP, X5R, 47µF, ±20%, 6.3V, 0805
TDK, C2012X5R0J476M125AC
9
1
D3
DIODE, SMT, SCHOTTKY, 30V, 200mA, 0.6mm × 1.0mm DFN2
DIODES INC., BAT54LP
10
1
D4
DIODE, SMT, 100V, 250mA, 50ns, SOD523
DIODES INC., BAS521-7
11
1
LTx
Transmit Antenna, 24µH, ±10%, 6A, 0.1Ω, Round, 50mm Diameter
WURTH, 760308100110
12
1
NTC Assembly
NTC Resistor Assembly, 10k AT 25°C, ±1%
MURATA, FTN55XH103FD4B
13
1
R2
RES, CHIP, 4 Terminal, 22mΩ, ±1%, 1W, 3216T4
SUSUMU, KRL3216T4-M-R022-F
14
1
R3
RES, CHIP, 12.4kΩ, ±1%, 1/16W, 040+D20:D262
VISHAY, CRCW040212K4FKED
15
0
R4-OPT, R7-OPT,
R11-OPT
RES, CHIP, TBD, ±1%, 1/16W, 0402
TBD
16
2
R5, R6
RES, CHIP, 100kΩ, ±1%, 1/16W, 0402
VISHAY, CRCW0402100KFKED
17
1
R8
RES, CHIP, 0Ω Jumper, 1/16W, 0402
VISHAY, CRCW04020000Z0ED
18
1
R9
RES, CHIP, 3.83kΩ, ±1%, 1/16W, 0402
VISHAY, CRCW04023K83FKED
19
1
R10
RES, CHIP, 59.0kΩ, ±1%, 1/16W, 0402
VISHAY, CRCW040259K0FKED
20
1
R14
RES, CHIP, 348kΩ, ±1%, 1/16W, 0402
VISHAY, CRCW0402348KFKED
21
1
R15
RES, CHIP, 5.23kΩ, ±1%, 1/16W, 0402
VISHAY, CRCW04025K23FKED
22
1
R16
RES, CHIP, 100kΩ, ±1%, 1/8W, 350V, 0603
ROHM, KTR03EZPF1003
23
1
R18
RES, CHIP, 10kΩ, ±1%, 1/16W, 0402
VISHAY, CRCW040210K0FKED
24
1
U1
IC, AutoResonant Wireless Power Transmitter, 4mm × 5mm QFN20
LINEAR TECH., LTC4125EUFD#PBF
Additional Demo Board Circuit Components
1
3
C1, C2, C3
CAP, CHIP, X5R, 100μF, ±20%, 6.3V, 1206
MURATA, GRM31CR60J107ME39L
2
3
C13, C15, C16
CAP, CHIP, X7R, 0.01µF, ±10%, 50V, 0402
TDK, C1005X7R1H103K050BB
3
2
C14, C17
CAP, CHIP, X5R, 1µF, ±10%, 16V, 0402
TDK, C1005X5R1C105K050BC
4
2
D1, D13
LED, RED, SMT, 0603
LUMEX, SML-LX0603SIW-TR
5
0
D2-OPT
DIODE, SMT, SCHOTTKY, 30V, 200mA, 0.6mm × 1.0mm DFN2
DIODES INC., BAT54LP
6
1
D5
LED, GREEN, SMT, 0603
LUMEX, SML-LX0603SUGW-TR
7
7
D6 ~ D12
LED, BLUE, SMT, 0603
LITE-ON, LTST-C193TBKT-5A
8
3
R1, R17, R41
RES, CHIP, 2.2kΩ, ±5%, 1/16W, 0402
VISHAY, CRCW04022K20JNED
9
8
R12, R24 ~ R30
RES, CHIP, 102kΩ, ±1%, 1/16W, 0402
VISHAY, CRCW0402102KFKED
10
1
R13
RES, CHIP, 0Ω jumper, 1/16W, 0402
VISHAY, CRCW04020000Z0ED
11
1
R19
RES, CHIP, 10kΩ, ±5%, 1/16W, 0402
VISHAY, CRCW040210K0JNED
12
2
R20, R33
RES, CHIP, 432Ω, ±1%, 1/16W, 0402
VISHAY, CRCW0402432RFKED
13
1
R21
RES, CHIP, 15.4kΩ, ±1%, 1/16W, 0402
VISHAY, CRCW040215K4FKED
14
1
R22
RES, CHIP, 27.4kΩ, ±1%, 1/16W, 0402
VISHAY, CRCW040227K4FKED
15
1
R23
RES, CHIP, 340kΩ, ±1%, 1/16W, 0402
VISHAY, CRCW0402340KFKED
dc2386aabfa
9
DEMO MANUAL
DC2386A-A/DC2386A-B
PARTS LIST
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
16
1
R31
RES, CHIP, 11.3kΩ, ±1%, 1/16W, 0402
VISHAY, CRCW040211K3FKED
17
1
R32
RES, CHIP, 787kΩ, ±1%, 1/16W, 0402
VISHAY, CRCW0402787KFKED
18
7
R34 ~ R40
RES, CHIP, 6.20kΩ, ±5%, 1/16W, 0402
VISHAY, CRCW04026K20JNED
19
1
R42-OPT, R43
RES, CHIP, 1Ω, ±5%, 1/10W, 0603
VISHAY, CRCW06031R00JNED
20
2
U2, U3
IC, Ultralow Power Quad Comparators with Reference, 3mm ×
3mm DFN8
LINEAR TECH., LTC1445CDHD#PBF
Hardware: For Demo Board Only
1
3
E1, E4, E5
TURRET, 0.09" DIA
MILL-MAX, 2501-2-00-80-00-00-07-0
2
2
E2, E3
Vertical Nana Jack, 575-4
KEYSTONE, 575-4
3
1
J1
Micro-USB Receptacle
WURTH, 629105136821
4
1
J2
JSC Connector for NTC Assembly
MURATA, MM5829-2700RJ4
5
3
JP1, JP2, JP3
3 PIN JUMPER, 2mm
Wurth, 62000311121
6
3
JP1, JP2, JP3
SHUNT, 2mm
SAMTEC, 2SN-KB-G
7
4
STAND - OFF, NYLON, 0.375" Tall (Snap on)
KEYSTONE, 8832 (SNAP ON)
8
0.01
SCOTCH, REMOVABLE POSTER TAPE W/DISPENSER, 0.75in.x
150in.
3M, MMM109
9
0.0004
Heat Cure Thermal Epoxy, 30CC tube
ELLSWORTH ADH. 3-6752 TC Adhesive
75G
DC2445A-A/DC2445A-B Required Circuit Components
1
1
C2S1
CAP, CHIP, C0G, 0.033µF, ±5%, 50V, 1206/0805
TDK, C2012C0G1H333J125AA
2
1
C1
CAP, CHIP, X5R. 4.7μF, ±10%, 25V, 0805
TDK, C2012X5R1E475K
3
1
C2
CAP, CHIP, X5R, 47µF, ±10%, 16V, 1210
MURATA, GRM32ER61C476KE15L
4
1
C3
CAP, CHIP, X7R, 0.01µF, ±10%, 50V, 0402
TDK, C1005X7R1H103R050BB
5
1
C4
CAP, CHIP, X5R, 2.2µF, ±20%, 6.3V, 0402
MURATA, GRM155R60J225ME15D
6
1
C5
CAP, CHIP, X7S, 10µF, ±20%, 50V, 1210
TDK, C3225X7S1H106M
7
1
C11
CAP, CHIP, X5R, 47μF, ±20%, 6.3V, 0805
TDK, C2012X5R0J476M
8
2
D1, D2
DIODE, SCHOTTKY, 40V, 2A, PowerDI123
DIODES, DFLS240L
9
1
D3
DIODE, ZENER, 13V, ±5%, 150mW, SOD-523
DIODES, BZT52C13T-7
10
1
D4
DIODE, Zener, 39V, ±5%, 1W, PowerDI123
DIODES, DFLZ39
11
1
FD1
25mm Ferrite Disc
ELNA MAGNETICS, B67410-A0223-X195
12
0
LRx
IND, EMBEDDED, 47µH, 43 Turns
EMBEDDED
13
1
L1
IND, SMT, 15µH, 260mΩ, ±20%, 0.86A, 4mm × 4mm
LPS4018-153ML
14
1
M1
MOSFET, SMT, 60V, 72mΩ, PowerPAK1212-8
VISHAY, Si7308DN-T1-GE3
15
1
M2
MOSFET, SMT, 30V, 75mΩ, SOT23
VISHAY, Si2343CDS-T1-GE3
16
1
Q1
NPN, SMT, 40V, SOT23
Diodes Inc, MMBT3904-7-F
17
1
R1
RES, CHIP, 1.40M, ±1%, 1/16W, 0402
VISHAY, CRCW04021M40FKED
18
1
R2
RES, CHIP, 412kΩ, ±1%, 1/16W, 0402
VISHAY, CRCW0402412KFKED
19
2
R3, R7
RES, CHIP, 10kΩ, ±1%, 1/16W, 0402
VISHAY, CRCW040210K0FKED
20
1
R5
RES, CHIP, 3.01kΩ, ±1, 1/16W, 0402
VISHAY, CRCW04023K01FKED
21
2
R6, R8
RES, CHIP, 0Ω Jumper, 1/16W, 0402
VISHAY, CRCW04020000Z0ED
26
1
R12
RES, CHIP, 5.1kΩ, ±5%, 1/16W, 0402
VISHAY, CRCW04025K10JNED
22
1
R36
RES, CHIP, 1kΩ, ±5%, 1/16W, 0402
VISHAY, CRCW04021K00JNED
23
1
R37
RES, CHIP, 24.9kΩ, ±1%, 1/16W, 0402
VISHAY, CRCW040224K9FKED
10
dc2386aabfa
DEMO MANUAL
DC2386A-A/DC2386A-B
SCHEMATIC DIAGRAM
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
24
1
R38
RES, CHIP, 470kΩ, ±5%, 1/16W, 0402
VISHAY, CRCW0402470KJNED
25
1
R39
RES, CHIP, 51kΩ, ±5%, 1/16W, 0402
VISHAY, CRCW040251K0JNED
Additional Demo Board Circuit Components
1
1
C2S2-OPT
CAP, CHIP, C0G,TBD, ±5%, 50V, 0603
TBD
2
2
C7, C10
CAP, CHIP, X5R, 1µF, ±10%, 16V, 0402
TDK, C1005X5R1C105K
3
3
C6, C8, C9
CAP, CHIP, X7R, 0.01µF, ±10%, 25V, 0402
TDK, C1005X7R1E103K
4
8
D5 ~ D12
DIODE, LED, GREEN, 0603
LITE-ON, LTST-C193KGKT-5A
5
1
R4
RES, CHIP, 2kΩ, ±5%, 1/16W, 0402
VISHAY, CRCW04022K00JNED
6
1
R11
RES, CHIP, 100kΩ, ±5%, 1/16W, 0402
VISHAY, CRCW0402100KJNED
7
1
R13
RES, CHIP, 10kΩ, ±5%, 1/16W, 0402
VISHAY, CRCW040210K0JNED
8
2
R14, R35
RES, CHIP, 432Ω, ±1%, 1/16W, 0402
VISHAY, CRCW0402432RFKED
9
2
R15, R33
RES, CHIP, 22.6kΩ, ±1%, 1/16W, 0402
VISHAY, CRCW040222K6FKED
10
1
R16
RES, CHIP, 34.8kΩ, ±1%, 1/16W, 0402
VISHAY, CRCW040234K8FKED
11
7
R17 ~ R23
RES, CHIP, 100kΩ, ±1%, 1/16W, 0402
VISHAY, CRCW0402100KFKED
12
1
R24
RES, CHIP, 49.9kΩ, ±1%, 1/16W, 0402
VISHAY, CRCW040249K9FKED
13
8
R25 ~ R32
RES, CHIP, 1kΩ, ±5%, 1/16W, 0402
VISHAY, CRCW04021K00JNED
14
1
R34
RES, CHIP, 787kΩ, ±1%, 1/16W, 0402
VISHAY, CRCW0402787KFKED
15
2
U2, U3
Ultralow Power Quad Comparators with Reference, 5mm × 4mm
DFN16
LINEAR TECH., LTC1445CDHD
Hardware: For Demo Board Only
1
6
E1, E2, E5, E6, E9,
E10
TURRET, 0.091"
MILL-MAX, 2501-2-00-80-00-00-07-0
2
4
E3, E4, E7, E8
TURRET, 0.061"
MILL-MAX, 2308-2-00-80-00-00-07-0
3
0
J1-OPT
CONN, 3 Pin Polarized
HIROSE, DF3-3P-2DSA
4
4
JP1, JP3-JP5
HEADER, 3 PIN JUMPER, 2mm
SAMTEC, TMM-103-02-L-S
5
1
JP2
HEADER, 4 PIN JUMPER, 2mm
SAMTEC, TMM-104-02-L-S
6
5
JP1-JP5
SHUNT, 2mm
SAMTEC, 2SN-BK-G
7
4
Clear 0.085" × 0.335" bumper
KEYSTONE, 784-C
8
0.005
SCOTCH, REMOVABLE POSTER TAPE W/DISPENSER, 0.75in. ×
0.75in.
3M, MMM109
9
4
STAND-OFF, NYLON, 0.375"
KEYSTONE, 8832
DC2445A-A Required Circuit Components
1
0
R9
No Load. SMD 0402
2
1
R10
RES, CHIP, 0Ω Jumper, 1/16W, 0402
VISHAY, CRCW04020000Z0ED
3
1
U1
400mA Wireless Synchronous Buck Battery Charger, 3mm × 3mm
QFN16
LINEAR TECH., LTC4120EUD-4.2
DC2445A-B Required Circuit Components
1
1
R9
RES, CHIP, 1.40M, ±1%, 1/16W, 0402
VISHAY, CRCW04021M40FKED
2
1
R10
RES, CHIP, 1.05M, ±1%, 1/16W, 0402
VISHAY, CRCW04021M05FKED
3
1
U1
400mA Wireless Synchronous Buck Battery Charger, 3mm × 3mm
QFN16
LINEAR TECH., LTC4120EUD
dc2386aabfa
11
1
2
3
GND
E5
E4
E3
GND
D+
D-
ID
VBUS
5
3
2
4
1
J1
USB Micro B RECEPTACLE
Wurth, 629105136821
VIN
E2
GND
GND
GND
GND
9
8
7
6
4
VIN
3 - 5.5V
2A
E1
4
C1
100µF
6.3V
1206
OPT
R42
1
0603
C2
100µF
6.3V
1206
D1
PWR
R1
2.2k
5%
R43
1
0603
C3
100µF
6.3V
1206
R8
0
R4
OPT
R2
22mOhm
1%
R9
3.83k
R5
100k
R3
12.4k
R10
59.0k
R6
100k
D2
OPT
R14
348k
3
Ith = 1.29A
Ilim = 1.93A
R11
OPT
R7
OPT
C4
0.01µF
3
EN
R13
0
C5
0.01µF
ENABLE
DISABLE
C6
4700pF
C7
470pF
2
14
6
13
12
11
10
7
9
5
15
4
3
1
CTS
CTD
NTC
FB
2
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
GB
NC
SCALE = NONE
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
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
APPROVALS
16 21
GND PGND
IN1
17 20
IN2
C10
1uF
16V
PTHM
PTH1
PTH2
DTH
FTH
IIMON
EN
IS+
IS-
IN
U1
LTC4125EUFD
D3
BAT54LP
CUSTOMER NOTICE
UNLESS NOTED:
RESISTORS: OHMS, 0402, 1%, 1/16W
CAPACITORS: uF, 0402, 10%, 50V
JP1
R12
102k
2
18
19
8
DATE:
N/A
SIZE
LTx
24µH
JP2
ENABLE
NTC
DISABLE
R18
10k
DATE
9 - 23 - 15
1
LTC4125EUFD
DEMO CIRCUIT 2330A
SHEET
1
OF
AUTO RESONANT WIRELESS TRANSMITTER
IC NO.
IMON
9- 23 - 15
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
C9
0.1µF
0603
100V
D4
BAS521
[email protected]°C
JSC connector
T
TECHNOLOGY
C8
0.1µF
R16
100k
0603
1206
100V
CTx
0.1µF
NTC
D5
STATUS
R17
2.2k
5%
GB
2
C12
47µF
10V
0805
APPROVED
DESCRIPTION
PRODUCTION FAB
REV
TITLE: SCHEMATIC
R15
5.23k
SW2
SW1
STAT
C11
47µF
10V
0805
-
ECO
1
REVISION HISTORY
2
12
1
4
1
2
3
4
DEMO MANUAL
DC2386A-A/DC2386A-B
SCHEMATIC DIAGRAM
dc2386aabfa
1
2
3
4
JP3
1.221V
ENABLE
U2E
LTC1445CDHD
IMON
VIN
8
V-REF
9
C14
1µF
16V
R20
432
5%
4
DISABLE
R19
10k
4
R30
102k
R29
102k
R28
102k
R27
102k
R26
102k
R25
102k
R24
102k
R23
340k
R22
27.4k
R21
15.4k
C13
0.01µF
C15
0.01µF
U2.3
C16
0.01µF
U3.3
R32
787k
R31
11.3k
3
C17
1µF
16V
R33
432
LTC1445CDHD
U3D
U3C
LTC1445CDHD
U3B
LTC1445CDHD
1.186V
U3A
LTC1445CDHD
U2D
LTC1445CDHD
LTC1445CDHD
U2C
1.186V
LTC1445CDHD
U2B
U2A
LTC1445CDHD
3
12
13
10
11
6
7
4
5
12
13
10
11
6
7
4
5
8
V-REF
9
MONITOR
15
16
1
2
15
16
1
2
U3E
LTC1445CDHD
149 17
3
149 17
3
149 17
3
149 17
3
149 17
3
149 17
3
149 17
3
149 17
3
D6
D7
D8
D9
D10
D11
D12
D13
2
2
2
2
2
2
2
2
14%
29%
43%
57%
71%
86%
100%
150%
INPUT CURRENT
CUSTOMER NOTICE
1
1
1
1
1
1
1
1
2
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
GB
NC
APPROVALS
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
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
5%
R34
6.20k
5%
R35
6.20k
5%
R36
6.20k
5%
R37
6.20k
5%
R38
6.20k
5%
R39
6.20k
5%
R40
6.20k
5%
R41
2.2k
2
DATE:
N/A
SIZE
1
LTC4125EUFD
DEMO CIRCUIT 2330A
SHEET
BAR GRAPH FOR AUTO RESONANT
WIRELESS TRANSMITTER
TECHNOLOGY
9 - 23 - 15
IC NO.
TITLE: SCHEMATIC
2
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
1
1
2
3
4
DEMO MANUAL
DC2386A-A/DC2386A-B
SCHEMATIC DIAGRAM
13
dc2386aabfa
14
1
2
3
4
VPROG
PROG
E4
E3
E2
E1
NTC
GND
Cx
5%
R4
2.0k
LRx
47µH
Embedded
Inductor
43T
EMBEDDED INDUCTOR
CONNECTED
DISCONNECTED
4
JP1
5%
50V
1206/0805
C2S1
0.033µF
4
C2S2
TBD
50V
0805
OPT
D2
DFLS240L
D1
DFLS240L
R36
1k
5%
D3
BZT52C15
13V
D4
DFLZ39
39V
Q1
MMBT3904LT1
M1
Si7308DN
PRESENCE DETECT
C11
47µF
6.3V
0805
R37
24.9k
3
3
JP2
RUN
ON
VIN > 11V
OFF
R7
10k
R6
0
R5
3.01k
INTVCC
JP3
FREQ
EXT
13
10
12
6
7
16
PROG
BATSNS/FB
NTC
DHC
FREQ
RUN
5
GND
IN
3
17
GND
11
9
8
4
2
1
14
15
-B
2
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
-
ECO
TECHNOLOGY
1.05MEG
DATE:
N/A
SIZE
1
SHEET
LTC4120EUD - 4.2 / LTC4120EUD
DEMO CIRCUIT 2445A - A / B
9 - 25 - 15
IC NO.
1
OF
1
2
REV.
400mA WIRELESS SYNCHRONOUS BUCK BATTERY CHARGER
TITLE: SCHEMATIC
BAT
ENTC
GND
J1
OPT
VBAR
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
1.40MEG
R10
0 Ohm
R9
LTC4120EUD
CHRG
DF3-3P-2DSA
1
3
2
E6
E7
FAULT
GND
E8
E9
BAT
2.7 V - 11V
C2
47µF
400mA
16V
1210 E5
GND
OPEN
R8
0
R39
51k
5%
R12
5.1k
5%
DATE
9 - 25 - 15
IN
12 - 40V
E10
GEORGE B.
APPROVED
U1
R10 *
R38
470k 5%
M2
Si2343CDS
R11
100k
5%
PRODUCTION
1
1
DESCRIPTION
REVISION HISTORY
REV
LTC4120 - 4.2EUD
R9 *
C1
4.7µF
25V
0805
L1
15.0µH
C4
2.2µF
6.3V
INTVCC
C3
0.01µF
ASSY
-A
*
APPROVALS
NC/FBG
BAT
CHGSNS
SW
BOOST
INTVCC
CHRG
FAULT
U1
LTC4120EUD-4.2 / LTC4120EUD
C5
10µF
50V
1210
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.
NC
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG. GEORGE B.
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
INT
JP4
NTC
R3
10k
INTVCC
1.5 MHz
750 kHz
R2
412k
R1
1.40MEG
2
1
2
3
4
DEMO MANUAL
DC2386A-A/DC2386A-B
SCHEMATIC DIAGRAM
dc2386aabfa
1.221V
ENABLE
C7
1µF
10V
R14
432
5%
R13
10k
DISABLE
MONITOR
U2E
LTC1445CDHD
VPROG
8
V-REF
9
JP5
49.9k
R24
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
C10
1µF
10V
432
R35
LTC1445CDHD
U3D
U3C
LTC1445CDHD
U3B
LTC1445CDHD
1.186V
U3A
LTC1445CDHD
U2D
LTC1445CDHD
LTC1445CDHD
U2C
1.186V
LTC1445CDHD
U2B
U2A
LTC1445CDHD
12
13
10
11
6
7
4
5
12
13
10
11
6
7
4
5
8
V-REF
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.
9
VBAR
15
16
1
2
15
16
1
2
U3E
LTC1445CDHD
149 17
3
149 17
3
149 17
3
149 17
3
149 17
3
149 17
3
149 17
3
149 17
3
D5
D6
D7
D8
D9
D10
D11
D12
2
2
2
2
2
2
2
2
6%
19%
31%
44%
56%
69%
81%
94%
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
GEORGE B.
NC
APPROVALS
CHARGE CURRENT
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 PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
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
DATE:
N/A
SIZE
TECHNOLOGY
SHEET
LTC4120EUD - 4.2 / LTC4120EUD
DEMO CIRCUIT 2445A - A / B
9 - 25 - 15
IC NO.
2
BAR GRAPH FOR 400mA WIRELESS SYNCHRONOUS
BUCK BATTERY CHARGER
TITLE: SCHEMATIC
OF
1
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
DEMO MANUAL
DC2386A-A/DC2386A-B
SCHEMATIC DIAGRAM
dc2386aabfa
15
DEMO MANUAL
DC2386A-A/DC2386A-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 application
engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
16 Linear Technology Corporation
dc2386aabfa
LT 0316 REV A • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2016
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