Linear Technology DC2181A Series Demo Manual

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Description

Ltc4120eud wireless power receiver and 400ma buck battery charger

Manuals Content

DEMO MANUAL DC2181A-A/B LTC4120EUD Wireless Power Receiver and 400mA Buck Battery Charger Description Demonstration circuit 2181 is an LTC®4120EUD demonstration board. The DC2181 is used with the DC1968A wireless power transmitter or the PowerByProxi ProxiPoint transmitter (both available separately). Either can deliver 2W to the DC2181, with up to 10mm spacing between the transmitter and the receive coil. The basic transmitter doesn’t support foreign metal object detection. Transmitters available separately. See last page for details.

FEATURED PART DC2181A-A

LTC4120EUD-4.2 (Fixed Output)

DC2181A-B

LTC4120EUD (Adjustable Output)

Design files for this circuit board are available at http://www.linear.com/demo/DC2181A 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.

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 = 0 ~ 700mA

V(BAT)

DC2181A BAT Pin Voltage

R9 = 1.40MΩ, R10 = 1.05MΩ

2.5

I(BAT)

DC2181A BAT Pin Current

V(BAT) = 3.7V, DC1967A(R5) = 3.01kΩ, All Bar Graph LEDs on.

370

MIN

TYP

MAX

UNITS

8

38

V

4.75

5.25

V

380

4.25

V

390

mA

Board Photo OR

OR

Figure 1. DC2181 Wireless Power Receiver Demo Board NOTE: These boards are not included with DC2181 and must be ordered separately. See last page for details.

Figure 2. DC1968A Wireless Power Basic Transmitter Demo Board

Figure 3. PowerByProxi ProxiPoint Transmitter

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1

DEMO MANUAL DC2181A-A/B Assembly Test Procedure For the proper measurement equipment setup and jumper settings refer to Figure 6a, if you are using the DC1968A wireless power basic transmitter, or Figure 5a, if you are using the PowerByProxi ProxiPoint transmitter. Please follow the checkout procedure, below, to familiarize yourself with the DC2181 demo board. 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 4 for proper scope probe technique. 1. Connect power to the transmitter. For the DC1968A basic transmitter set PS1 to 5V, and turn on. For the PowerByProxi ProxiPoint transmitter, plug in the power supply that came with the transmitter. 2. Set PS2 to 3.6V, and turn the supply on. PS2 is the battery emulator battery voltage. The purpose of the 3.6Ω is to make PS2 into a bipolar supply. Most power supplies can only source current not sink current, bipolar supplies can do both. A bipolar supply is necessary for a battery emulator, as it must absorb the current coming from the charger. By placing a 3.6Ω resistor in parallel with a normal supply, the supply can absorb up to 1A, at 3.6V.

3. Place the DC2181A receive board on the transmitter as shown in Figure 5c, if you are using the PowerByProxi ProxiPoint transmitter. Or as shown in Figure 6c, if using the DC1968A. Note: for the ProxiPoint transmitter, the LED the ProxiPoint transmitter should change from green to solid red. If the LED turns blinking red, please remove the DC2181A board, wait until the LED turns green, and once again place the DC2181 on the transmitter. If the ProxiPoint transmitter LED does not change to solid red on the second try, please contact your FAE. 4. The green bar graph LEDs on the DC2181 demo board should light. Observe AM1, there is an additional 10mA flowing from the BAT into the bar graph LEDs. Please ensure that VM1 measures less than 4V. If not lower PS2 until it does. The bar graph LEDs indicate the percent of programmed charge current flowing into the battery. They do so by monitoring the PROG voltage. PROG will be 1V, at full programmed charge current. If you lower the battery emulator voltage, by lowering PS2, until VM1 reads approximately 2.9V, you will see the bar graph drop to 10%. This is the trickle current, which is set to 10% of the programmed charge current. 5. Test is complete.

Figure 4. Proper Measurement Technique for Measuring Ripple

2

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DEMO MANUAL DC2181A-A/B Assembly Test Procedure

PS1



3.6V POWER SUPPLY 1A

– 3.6Ω

+

VM1

+

AM1

A



V

+

Figure 5a. DC2181A-A/B Wireless Power Demo Board Connection

Figure 5b. PowerByProxi’s ProxiPoint Transmitter

Figure 5c. DC2181A-A/B Wireless Power Demo Board Mounted on PowerByProxi’s ProxiPoint Transmitter

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. dc2181afa

3

DEMO MANUAL DC2181A-A/B Assembly Test Procedure



PS2

3.6V BIPOLAR SUPPLY

+

1A

– 3.6Ω

VM1

+

AM1

A



V

+

Figure 6a. DC2181A-A/B Wireless Power Demo Board Connection

PS1

+

5V POWER SUPPLY 1A



Figure 6b. DC1968A Wireless Power Basic Transmitter Connection

Figure 6c. DC2181A-A/B Wireless Power Demo Board Mounted on DC1968A Wireless Power Basic Transmitter

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.

4

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DEMO MANUAL DC2181A-A/B Theory of Operation The DC2181A demo board demonstrates operation of a double tuned magnetically coupled resonant power transfer circuit. The DC2181A demo Board must be used in conjunction with either the DC1968A wireless power basic transmitter or the PowerByProxi ProxiPoint transmitter. For theory of operation of the PowerByProxi ProxiPoint transmitter, please refer to the ProxiPoint documentation. DC1968A – Basic Transmitter The DC1968A basic transmitter is used to transmit wireless power and is used in conjunction with the DC2181A wireless power receiver board featuring the LTC4120. The DC1968A is configured as a current fed astable multivibrator, with oscillation frequency set by a resonant tank. 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 capacitors (Cx1 and Cx2) and the 5.0µH (Lx) transmit coil (see Schematic: Basic Inductive Transmitter with PreRegulator). 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. 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 7.

The blue and green traces are the drains of the transmitter MOSFETs M1 and M2 (see Schematic: Basic Inductive Transmitter with Pre-Regulator), 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. DC2181 – Wireless Power Receiver Board Featuring the LTC4120 The DC2181 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 AE1, and C2S, although it must be noted that C2S is AC grounded through C5, the LTC4120 decoupling capacitor, to be in parallel with AE1. C2S also serves to tap power off the resonant circuit and send it to the LTC4120, (see Schematic: 400mA Wireless Synchronous Buck Battery Charger).

VCx-Cy 20V/DIV VCx 10V/DIV VCy 10V/DIV 2µs/DIV

DC2181A F07

Figure 7. DC1968A Basic Transmitter

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5

DEMO MANUAL DC2181A-A/B Theory of Operation The waveforms in Figure 8 were captured at a transmitto-receive gap of 8mm. The blue trace is the waveform at the CX pin of the receiver board (see Schematic: 400mA Wireless Synchronous Buck Battery Charger), and the red trace is the charge current into the battery. Although the transmit waveform is a sine wave, the series-parallel connection 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, 10mA has been diverted to the charge LEDs, for a net battery charge current of 390mA. The ripple on the charge current is synchronous to the transmit waveform.

IBAT VBAT = 3.7V 100µA/DIV

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 and receive coils. The LTC4120 wireless power receiver IC increases power transfer when power transfer is insufficient. This is accomplished by switching capacitors into the resonant circuit using the DHC pin. This gives a much wider operating transmit distance. Figure 9 shows VIN to the LTC4120 and the battery charge current. 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.

Cx TO GND 20V/DIV 2µs/DIV

DC2181A F08

Figure 8. DC2181A Receiver Board

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 AE1 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 10 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.

6

VIN TO GND 5V/DIV IBAT 100mA/DIV VBAT = 3.7V

2µs/DIV

DC2181A F09

Figure 9. DC2181A Receiver

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DEMO MANUAL DC2181A-A/B Theory of Operation AE1, the Receive Antenna

The manufacturers can be contacted at:

One of the main differences between the DC1967A and the DC2181 demo boards, is that the wireless power receive antenna is separate for the DC2181 demo board.

Inter-Technical

www.inter-technical.com, search for LTC4120

TDK

www.tdk.components.com

Würth

http://katalog.we-online.de/pbs/ datasheet/760308101303.pdf

Several antennas were tested, with the criteria of passing 2.5W at 8mm spacing. The following table lists the antennas that passed successfully: MANUFACTURER

CONSTRUCTION

MFG PART NUMBER

TDK

Ferrite on PCB

B67410-A0223-X195

Inter-Technical

Ferrite on PCB

L41200R01

Inter-Technical

Ferrite on PCB

L41200R02*

Inter-Technical

Litz on Ferrite

L41200R03

Inter-Technical

Litz on Ferrite

L41200R04

Inter-Technical

Ferrite on PCB

L41200R05

TDK

Wire on Ferrite

WR282830-37M8-LR4

Würth

Wire on Ferrite

760308101303

AE1 is physically mounted with double sided tape, as well as the electrical connection pins. Removing AE1 is likely to damage the ferrite on the backside of the antenna. Only remove AE1 when you have the a suitable replacement at hand.

*AE1 wireless power receive antenna shipped with DC2181

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 DC2181A F10

Figure 10. Power Transfer vs Axial Distance and Misalignment dc2181afa

7

DEMO MANUAL DC2181A-A/B Parts List ITEM

QTY

REFERENCE

PART DESCRIPTION

MANUFACTURER/PART NUMBER

DC2181A General Bill of Materials DC2181A Required Circuit Components 1

1

AE1

RECEIVE ANTENNA

INTER-TECHNICAL, L41200R02

2

2

C2S1, C2P1

CAP, CHIP, C0G, 0.0047μF, ±5%, 50V, 0805

MURATA, GRM2165C1H472JA01D

3

1

C2P2

CAP, CHIP, C0G, 0.0018μF, ±5%, 50V, 0603

KEMET, C0603C182J5GAC7533

4

1

C2S2

CAP, CHIP, C0G, 0.022μF, ±5%, 50V, 0805

MURATA, GRM21B5C1H223JA01L

5

1

C1

CAP, CHIP, X5R, 10μF, ±20%, 16V, 0805

TDK, C2012X5R1C106K

6

1

C2

CAP, CHIP, X5R, 47μF, ±10%, 16V, 1210

MURATA, GRM32ER61C476KE15L

7

1

C3

CAP, CHIP, X7R, 0.01μF, ±10%, 50V, 0603

TDK, C1608X7R1H103K

8

1

C4

CAP, CHIP, X5R, 2.2μF, ±20%, 6.3V, 0402

MURATA, GRM155R60J225ME15D

9

1

C5

CAP, CHIP, X7S, 10μF, ±20%, 50V, 1210

TDK, C3225X7S1H106M

10

3

D1, D2, D3

DIODE, SCHOTTKY, 40V, 2A, PowerDI123

DIODES, DFLS240L-7

11

1

L1

IND, SMT,15μH, 260mΩ, ±20%, 0.86A, 4mm × 4mm

COILCRAFT, LPS4018-153ML

12

1

R1

RES, CHIP, 1.40M, ±1%, 1/16W, 0402

VISHAY, CRCW04021M40FKED

13

1

R2

RES, CHIP, 412kΩ, ±1%, 1/16W, 0402

VISHAY, CRCW0402412KFKED

14

2

R3, R7

RES, CHIP, 10kΩ, ±1%, 1/16W, 0402

VISHAY, CRCW040210K0FKED

15

1

R5

RES, CHIP, 3.01kΩ, ±1%, 1/16W, 0402

VISHAY, CRCW04023K01FKED

16

1

R36

RES, CHIP, 0Ω JUMPER, 1/16W, 0402

VISHAY, CRCW04020000Z0ED

Additional Demo Board Circuit Components 1

3

C6, C8, C9

CAP, CHIP, X7R, 0.01μF, ±10%, 25V, 0402

TDK, C1005X7R1E103K

2

2

C7, C10

CAP, CHIP, X5R, 1μF, ±10%, 16V, 0402

TDK, C1005X5R1C105K

3

1

D4

DIODE, ZENER, 39V, ±5%, 1W, PowerDI123

DIODES, DFLZ39

4

8

D5, D6, D7, D8, D9, D10, DIODE, LED, GREEN, 0603 D11, D12

LITE-ON, LTST-C193KGKT-5A

5

1

R4

RES, CHIP, 2kΩ, ±5%, 1/16W, 0402

VISHAY, CRCW04022K00JNED

6

2

R11, R12

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, R18, R19, R20, R21, R22, 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 TO R32

RES, CHIP, 1kΩ, ±5%, 1/16W, 0402

VISHAY, CRCW04021K00JNED

14

1

R34

RES, CHIP, 787kΩ, ±1%, 1/16W, 0402

VISHAY, CRCW0402787KFKED

15

2

R6, R38

RES, CHIP, 0Ω JUMPER, 1/16W, 0402

VISHAY, CRCW04020000Z0ED

16

0

R8-OPT, R37-OPT

RES, CHIP, 0Ω JUMPER, 1/16W, 0402

VISHAY, CRCW04020000Z0ED

17

2

U2, U3

ULTRALOW POWER QUAD COMPARATORS WITH REFERENCE, 5mm × 4mm DFN16

LINEAR TECHNOLOGY, LTC1445CDHD

8

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DEMO MANUAL DC2181A-A/B Parts List ITEM

QTY

REFERENCE

PART DESCRIPTION

MANUFACTURER/PART NUMBER

Hardware: For Demo Board Only 1

4

E3, E4, E7, E8

TURRET, 0.091˝

MILL-MAX, 2501-2-00-80-00-00-07-0

2

4

E1, E2, E5, E6

TURRET, 0.061˝

MILL-MAX, 2308-2-00-80-00-00-07-0

3

2

J1, J2

HEADER, 1PIN, 0.020˝ × 0.020˝

SAMTEC, TMM-101-02-L-S

4

0

J3-OPT

CONN, 3 PIN POLARIZED

HIROSE, DF3-3P-2DSA

5

2

BP1, BP2, BP3, BP4

CLEAR 0.200˝ × 0.440˝ BUMPER

KEYSTONE, 785-C

6

0.00058

7

4

ITEM

QTY

3M, 0.5IN WIDE, 1/16IN THICK, DOUBLE SIDED FOAM 3M, 4466 TAPE, 0.75IN × 0.50IN PIECE STAND-OFF, NYLON, 0.375˝

REFERENCE

PART DESCRIPTION

KEYSTONE, 8832

MANUFACTURER/PART NUMBER

DC2181A-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 TECHNOLOGY, LTC4120EUD-4.2

ITEM

QTY

REFERENCE

PART DESCRIPTION

MANUFACTURER/PART NUMBER

DC2181A-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 TECHNOLOGY, LTC4120EUD

dc2181afa

9

DEMO MANUAL DC2181A-A/B Parts List ITEM

QTY

REFERENCE

PART DESCRIPTION

MANUFACTURER/PART NUMBER

DC1968A Bill of Materials DC1968A Required Circuit Components 1

1

CX1, CX2

CAP, CHIP, PPS, 0.15µF, ±2%, 50V, 6mm × 4.1mm

PANASONIC, ECHU1H154GX9

2

2

C4, C5

CAP, CHIP, X7R, 0.01µF, ±10%, 50V, 0402

MURATA, GRM155R71H103KA88D

3

1

C6

CAP, CHIP, X7R, 4.7µF, ±10%, 50V, 0402

MURATA, GRM31CR71H475KA12L

4

1

C7

CAP, CHIP, X5R, 0.068µF, ±10%, 50V, 0603

MURATA, GRM188R71H683K

5

1

C8

CAP, CHIP, C0G, 330pF, ±5%, 50V, 0402

TDK, C1005COG1H331J

6

1

C9

CAP, CHIP, X7R, 0.47µF, ±10%, 25V, 0603

MURATA, GRM188R71E474K

7

1

C10

CAP, CHIP, X5R, 22µF, ±20%, 6.3V, 0805

TAIYO-YUDEN, JMK212BJ226MG

8

2

D1, D4

DIODE, ZENER, 16V, 350mV, SOT23

DIODES, BZX84C16

9

2

D2, D3

DIODE, SCHOTTKY, 40V, 1A, 2DSN

ON SEMICONDUCTOR, NSR10F40NXT5G

10

1

D5

DIODE, SCHOTTKY, 40V, 2A, PowerDI123

DIODES, DFLS240L

11

2

L1, L2

IND, SMT, 68µH, 0.41A, 0.40Ω, ±20%, 5mm × 5mm

TDK, VLCF5028T-680MR40-2

12

1

L3

IND, SMT, 4.7µH, 1.6A, 0.125Ω, ±20%, 4mm × 4mm

COILCRAFT, LPS4018-472M

13

1

Lx

TRANSMIT COIL

TDK, WT-505060-8K2-LT

14

2

M1, M2

MOSFET, SMT, N-CHANNEL, 60V, 11mΩ, SO8

VISHAY, Si4108DY-T1-GE3

15

1

M3

MOSFET, SMT, P-CHANNEL, –12V, 32mΩ, SOT23

VISHAY, Si2333DS

16

1

M4

MOSFET, SMT, N-CHANNEL, 60V, 7.5Ω, 115mA, SOT23

ON SEMI, 2N7002L

17

2

R1, R2

RES, CHIP, 100Ω, ±5%, 1/16W, 0402

VISHAY, CRCW0402100RJNED

18

2

R3, R8

RES, CHIP, 150kΩ, ±5%, 1/16W, 0402

VISHAY, CRCW0402150JNED

19

1

R4

RES, CHIP, 40.2kΩ, ±1%, 1/16W, 0402

VISHAY, CRCW040240K2FKED

20

1

R5

RES, CHIP, 20kΩ, ±1%, 1/16W, 0402

VISHAY, CRCW040220K0FKED

21

2

R6, R10

RES, CHIP, 100kΩ, ±1%, 1/16W, 0402

VISHAY, CRCW0402100KFKED

22

1

R7

RES, CHIP, 536kΩ, ±1%, 1/16W, 0402

VISHAY, CRCW0402536KFKED

23

1

U1

LT3480EDD, PMIC 38V, 2A, 2.4MHz STEP-DOWN SWITCHING LINEAR TECHNOLOGY, LT3480EDD REGULATOR WITH 70µA QUIESCENT CURRENT

Additional Demo Board Circuit Components 1

0

CX3-OPT, CX4-OPT

CAP, PPS, 0.15µF, 2.5%, 63VAC, MKS02

WIMA, MKS0D031500D00JSSD

2

1

D6

LED, GREEN, 0603

LITE-ON, LTST-C190KGKT

3

1

R9

RES, CHIP, 1kΩ, ±5%, 1/16W, 0402

VISHAY, CRCW04021K00JNED

TURRET, 0.09 DIA

MILL-MAX, 2501-2-00-80-00-00-07-0

STAND-OFF, NYLON, 0.375˝

KEYSTONE, 8832

Hardware: For Demo Board Only 1

6

2

4

10

E1 TO E6

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1

2

3

4

PROG

NTC

GND

Cx

E2

E1

J2

J1

AE1

J2

J1

5%

R4 2.0k

4

VPROG

NOTE: PCB AE1 CONNECTS TO J1 AND J2

FIGURE 1.

4

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

R38 0

R39 0 OPT

OFF

3

R7 10k

R6 0

EXT

INT

PROG

BATSNS/FB

10 13

NTC

DHC

FREQ

RUN

12

6

7

16

3 IN

17

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.

PCB DES.

TECHNOLOGY

1 2 3

J3 OPT

DF3-3P-2DSA

BAT GND ENTC

BAT 2.7 V - 4.2V C2 400mA 47uF 16V E3 1210 GND

VBAR

nCHRG

nFAULT

E4

E5

E6

GND

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 7 - 17 - 14

VIN 12V - 40V

E7

E8

GEORGE B.

APPROVED

DATE:

N/A

SIZE

1

SHEET 1

LTC4120EUD - 4.2 / LTC4120EUD DEMO CIRCUIT 2181A - A / B 7 - 17 - 14

IC NO.

OF

2

3

REV.

400mA WIRELESS SYNCHRONOUS BUCK BATTERY CHARGER

TITLE: SCHEMATIC

LTC4120EUD

R9

R10 *

OPEN 1.40MEG

R9 *

U1

APP ENG.

SCALE = NONE

L1 15.0uH

R11 100k 5%

PRODUCTION

3

1

DESCRIPTION

REVISION HISTORY

REV

R10 TO BE CONNECTED TO " BAT " NODE AT BAT TURRET (E4)

C1 10uF 16V 0805

0603

C3 0.01µF

-

ECO

LTC4120EUD - 4.2

APPROVALS

NC/FBG

BAT

CHGSNS

SW

BOOST

INTVCC

FAULT CHRG

U1 LTC4120EUD-4.2 / LTC4120EUD

GND

2

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

5

GND

D4 DFLZ39 39V

UNLESS NOTED: RESISTORS: OHMS, 0402, 1%, 1/16W CAPACITORS: uF, 0402, 10%, 50V

R37 0 OPT

R5 3.01k

R2 412k

R1 1.40MEG

R36 0

10k

R3

INTVCC

R40 0 OPT

Run for Vin > 11V

Do *not* install R38 AND R39 simultaneously

750 kHz

1.5 MHz D3 DFLS240L

INTVCC

ON

R41 0 OPT

Do *not* install R40 AND R41 simultaneously

3

1

2

3

4

DEMO MANUAL DC2181A-A/B

Schematic Diagram

11

dc2181afa

1.221V

LTC1445CDHD

U2E

VPROG

8

V-REF

9

C7 1µF 10V

5%

R13 10k

R14 432

0

R42

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

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

12

13

10

11

6

7

4

5

12

13

10

11

6

7

4

5

8 V-REF

12 9

VBAR

15

16

1

2

15

16

1

2

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

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

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

GEORGE B.

SCALE = NONE

NC

PCB DES. APP ENG.

APPROVALS TECHNOLOGY

SHEET 2

LTC4120EUD - 4.2 / LTC4120EUD DEMO CIRCUIT 2181A - A / B

7 - 17 -14

IC NO.

BAR GRAPH FOR 400mA WIRELESS SYNCHRONOUS BUCK BATTERY CHARGER

DATE:

N/A

SIZE

TITLE: SCHEMATIC

OF

2

3

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 DC2181A-A/B Schematic Diagram

dc2181afa

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.

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

321

5678

R6 100k

R7 536k

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

DESCRIPTION PRODUCTION FAB

3

1

REVISION HISTORY

REV

NC GEORGE B. TITLE: SCHEMATIC

APPROVALS

D4 BZX84C16 16V

PCB DES.

5%

100

C5 0.01uF

100 5%

L2 68uH

D3 NSR10F40NXT5G

M3 Si2333DS

R2

M4 2N7002L

2

3

R1

2

3

R10 100k

1

CUSTOMER NOTICE

D1 BZX84C16 16V

C4 0.01uF

D2 NSR10F40NXT5G

L1 68uH

6.3V 0805

20%

C10 22uF

5V OUT

2

1

2

3

4

DEMO MANUAL DC2181A-A/B

Schematic Diagram

dc2181afa

13

DEMO MANUAL DC2181A-A/B The DC1968A Basic Wireless Transmitter is available from Linear Technology as part of the DC1969A-B Wireless Power Kit. To obtain the DC1968A Basic Wireless Transmitter, please order the DC1969A-B kit. The ProxiPoint Transmitters are available from PowerByProxy: www.powerbyproxi.com/evaluation-kits/proxi-point/ 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

14 Linear Technology Corporation

dc2181afa LT 1214 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 2014

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