Analog Devices LINEAR DC2769A-A-KIT Guida rapida alla configurazione

DEMO MANUAL

DC2769A-A-KIT

Rev. 0

DESCRIPTION

LTC6990/LTC4124

10mA Wireless Li-Ion Charger

10mA Demonstration Kit

DC2769A-A-KIT is a kit of the DC2771A-A transmitter

board, featuring LTC

6990, the DC2775A-A, featuring

LTC4124, and the DC2774A application-sized receiver

board featuring LTC4124. The DC2775A-A receiver can

All registered trademarks and trademarks are the property of their respective owners.

PERFORMANCE SUMMARY

KIT CONTENTS

BOARD PHOTO

charge a single Li-Ion battery at up to 10mA with an air gap

of 0.5mm between the transmit and receive coils.

Design files for this circuit board kit are available.

Specifications are at TA= 25°C

Figure1. DC2771A-A Picture Figure2. DC2775A-A Picture Figure3. DC2774A Picture

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

VIN DC2771A-A Voltage Input IVIN ≤ 100mA 4.5 5.5 V

IIN DC2771A-A VIN Current VIN = 5V 100 mA

VBAT DC2775A Battery Charge Voltage VSEL1 = VCC, VSEL2 = GND 4.2 V

VBAT DC2775A-A Battery Charge Voltage VSEL1 = HI, VSEL2 = HI 4.35 V

VSEL1 = HI, VSEL2 = LO 4.2 V

VSEL1 = LO, VSEL2 = HI 4.1 V

VSEL1 = LO, VSEL2 = LO 4.0 V

IBAT DC2775A-A Charge Current VBAT = 4.0V, ISEL1 = ISEL2 = GND 10 mA

Air-Gap Separation Between LTX and LRX 0 0.5 0.75 mm

fDRIVE DC2771A-A Drive Frequency 1 MHz

fTX_TANK DC2771A-A Resonant Tank Frequency 1.4 MHz

fRX_TANK DC2775A-A Resonant Tank Frequency 1 MHz

1 × DC2771A-A (LTC6990) Transmitter Demo Board

1 × DC2775A-A (LTC4124) Receiver Demo Board

2 × DC2774A (LTC4124) Application-Sized Receiver Demo Board

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DEMO MANUAL

DC2769A-A-KIT

Rev. 0

QUICK START PROCEDURE

Refer to Figure5 to 8 for the proper measurement equip-

ment setup, DC2775A-A mounting on DC2771A-A, and

follow the procedure below:

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 signal

and GND terminals. See Figure9 for proper scope probe

technique.

1. Plug a Micro-USB cable into DC2771A-A.J1 connector,

with the other end of the cable connected to a com-

puter USB port or a 5V USB power adapter. The demo

may also be powered by a 5V supply PS2 connecting

between VIN and GND turrets (Figure6).

2. The default battery charge voltage is 4.2V and the

charging current is 10mA. Battery charge voltage,

charge current, pre-charge feature and low battery

disconnect voltage can be programmed by jumpers

on the DC2775A-A board.

3. Connect a voltage source PS1 and a 200Ω resistor

RBAT1 between the BAT and GND turrets of DC2775A-A,

respectively (Figure5). PS1 and RBAT1 make up the

battery emulator. Typical power supplies cannot sink

current. By adding a resistor across the power supply

inputs that draws more current than the maximum bat-

tery charging current, the power supply only sources

current even when the battery charge current is at its

maximum value.

4. Connect an ammeter AM1 between PS1 and the

DC2775A-A BAT turret. Connect a voltmeter VM1

between DC2775A-A BAT and GND turrets.

5. Set PS1 = 3.7V. If PS2 is used instead of Micro-

USB, set PS2 = 5V and turn on both power supplies

simultaneously.

6. DC2771A-A.D1 LED should be turned on. DC2775A.D1

LED should start blinking intermittently. AM1 should

be reading 10mA. If the AM1 meter reads much less

than 10mA, read VM1 and check whether LTC4124 is

in constant current mode (Figure4).

7. Turn off PS1 and PS2 simultaneously. Remove

DC2775A-A from DC2771A-A. Place two DC2774A

boards on top DC2771A-A coil (Figure8).

8. Turn on PS2. DC2774A.D1 LED should start blinking

intermittently.

9. Turn of PS2 and remove DC2774A from DC2771A-A.

Figure4. Battery Charge Current vs BAT Pin Voltage

BATTERY VOLTAGE

(% OF FINAL CHARGE VOLTAGE)

100

080

DC2769AA F04

1109070 10060

BATTERY CHARGE CURRENT

(% OF PROGRAMMED CHARGE CURRENT)

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DEMO MANUAL

DC2769A-A-KIT

Rev. 0

QUICK START PROCEDURE

Figure5. DC2775A-A Top

+–

–

AMI

BATTERY EMULATOR

VMI

RBAT1

200Ω

PS1

3.7V DC

0.5A

Figure6. DC2771A-A Top

Figure7. DC2775A-A on top of DC2771A-A

PS2

5.0V DC

0.1A

CONNECT TO A 5V POWER

SUPPLY TO VIN AND GND

TURRENTS

–

POWER DC2771A-A

USING MICRO-USB

CABLE TO HOST OR A

5V ADAPTER.

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DEMO MANUAL

DC2769A-A-KIT

Rev. 0

HARDWARE SETUP

Figure8. DC 2774A on top of DC2771A-A in Operation

Figure9. 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.

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DEMO MANUAL

DC2769A-A-KIT

Rev. 0

OPERATION

The DC2769A-A-KIT demonstrates operation of a mag-

netically coupled resonant Wireless Power Transfer (WPT)

system. The LTC6990 based transmitter provides efficient

wireless power for the LTC4124 receiver to charge the

Li-Ion battery.

DC2771A-A – Wireless Power Transmitter Board

Featuring the LTC6990

The DC2771A-A is a wireless power transmitter board

using LTC6990 oscillator. The NMOS, M1(see DC2771A-A

schematic on Page 7), is driven by a 50% duty cycle square

wave generated by the oscillator. During the first half of

the cycle, M1 is switched on and the current through

the LC resonant tank rises linearly. During the second

half of the cycle, M1 is switched off and the current cir-

culates through the LC resonant tank. If the transmit LC

tank frequency is set to 1.29 times the driving frequency,

which is 1MHz in this application, switching losses in

M1 are significantly reduced due to the zero-voltage

switching (ZVS). Figure10 illustrates the ZVS operation

in DC2771A-A. The peak voltage of the transmit resonant

tank that appears at the drain of M1 is:

=1.038• π•V

This equation is derived by performing voltage second

balance equation on the resonant tank inductor.

GS_M1

2V/DIV

DS_M1

5V/DIV

DC2769AA F10

Figure10. ZVS Operation on M1 when fTX_TANK = 1.29 •fDRIVE

DC2775A-A – Wireless Power Receiver Board

Featuring the LTC4124

The DC2775A-A demo board implements a parallel res-

onant LC circuit that connects the LTC4124 between ACIN

and GND pins. The AC waveform on the resonant circuit

is rectified by the internal wireless power managing cir-

cuitry to DC voltage on VCC pin. This DC source is then

fed into the internal linear battery charger to charge a

Li-Ion battery.

As shown in Figure11, when the LTC4124 receives more

energy than it needs to charge the battery, the wireless

power manager in the IC keeps the input voltage to the

IC, V

, low by shunting the receiver resonant tank to

ground. In this way, the linear charger is highly efficient

as its input is always kept just above the battery voltage,

VBAT. The resonant tank also receives less power when

the shunting circuit is engaged, as the resonant frequency

is detuned from the transmitter frequency.

The LTC4124 includes a full featured CC/CV (Constant

Current/Constant Voltage) linear battery charger with

trickle current pre-charge, safety timer termination, bad

battery detection, temperature qualified safe charging and

automatic recharge. The maximum charge current sup-

ported by DC2775A-A is 10mA and the charge voltage is

programmable by VSELXjumpers.

2V/DIV

ACIN

2V/DIV

BAT

2V/DIV

DC2769AA F11

Figure11. Rectification of AC Input and Regulation of VCC

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DEMO MANUAL

DC2769A-A-KIT

Rev. 0

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

DC2771A-A: Required Circuit Components

1 1 C1 CAP., 4.7μF, X5R, 10V, 10%, 0402 TDK, C1005X5R1A475K050BC

2 1 C2 CAP., 10μF, X5R, 6.3V, 20%, 0402 MURATA, GRJ155R60J106ME11D

3 1 CTx2 CAP., 1800pF, C0G, 50V, 5%, 0603 MURATA, GRM1885C1H182JA01D

4 1 LTx1 IND., 7.5μH, WIRELESS CHRG. COIL RX. Qi, 10%,

1.55A, 380mΩ, 2815, 1 COIL, 1 LAYER

WURTH ELEKTRONIK, 760308103206

5 1 M1 XSTR., MOSFET, N-CH, 20V, 1.4A, SOT-323, AEC-Q200 INFINEON, BSS816NWH6327XTSA1

6 1 R1 RES., 49.9k, 1%, 1/16W, 0402, AEC-Q200 NIC, NRC04F4992TRF

7 1 R2 RES., 2.2k, 5%, 1/16W, 0402, AEC-Q200 VISHAY, CRCW04022K20JNED

8 1 R3 RES., 1Ω, 1%, 1/16W, 0402, ±100ppm, AEC-Q200 VISHAY, CRCW04021R00FKED

9 1 U1 OSCILLATOR, TIMERBLOX: VCO, 5pF, 90ppm, DFN-5 ANALOG DEVICES, INC., LTC6990CDCB#PBF

Additional Demo Board Circuit Components

1 1 D1 LED, RED, WATER-CLEAR, 0603 LITE-ON, LTST-C193KRKT-5A

Hardware: For Demo Board Only

1 2 E1, E2 TEST POINT, TURRET, 0.064" MTG. HOLE, PCB

0.062"THICK

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

2 1 J1 CONN., μUSB 2.0, RCPT., 5 PINS, 1 PORT, REVERSE

MOUNT, R/A HORZ., TYPE B, FLANGELESS

TE CONNECTIVITY, 1932788-1

DC2775A-A: Required Circuit Components

1 1 CRx1 CAP., 3300pF, X7R, 50V, 10%, 0402 AVX, 04025C332KAT2A

2 1 LRx1 IND., 7.2μH, WIRELESS CHRG. COIL RX., ±10%,

500mA, 440mΩ, 6mm × 2mm, 1 COIL, 1 LAYER

WURTH ELEKTRONIK, 760308101216

3 1 U1 IC, 100mA WIRELESS LI-ION CHARGER WITH LOW

BATTERY DISCONNECT, LQFN-12

ANALOG DEVICES, INC., LTC4124EV#PBF

Additional Circuit Components

1 1 D1 LED, RED, WATER CLEAR, 0201 KINGBRIGHT, APG0603SEC-E-TT

2 1 Z1 DIODE, ZENER, 3.3V, 100mW, 0201 COMCHIP, CZRZ3V3B-HF

DC2775A-A: Required Circuit Components

1 1 CRx1 CAP., 3300pF, X7R, 50V, 10%, 0402 AVX, 04025C332KAT2A

2 1 LRx1 IND., 7.2μH, WIRELESS CHRG. COIL RX., ±10%,

500mA, 440mΩ, 6mm × 2mm, 1 COIL, 1 LAYER

WURTH ELEKTRONIK, 760308101216

3 1 RT1 RES., 100k, 1%, 0201, NTC THERMISTOR TDK, NTCG064EF104FTBX

4 1 U1 IC, 100mA WIRELESS LI-ION CHARGER WITH LOW

BATTERY DISCONNECT, LQFN-12

ANALOG DEVICES, INC., LTC4124EV#PBF

Additional Circuit Components

1 1 D1 LED, RED, WATER-CLEAR, 0603 LITE-ON, LTST-C193KRKT-5A

2 1 R2 RES., 0Ω, 5%, 1/16W, 0402 ROHM, MCR01MZPJ000

Hardware: For Demo Board Only

1 10 E1-E10 TEST POINT, TURRET, 0.064" MTG. HOLE, PCB

0.062"THICK

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

2 8 JP1-JP8 CONN., HDR, MALE, 1×3, 2mm, VERT, STR, THT WURTH ELEKTRONIK, 62000311121

3 8 XJP1-XJP8 CONN., SHUNT, FEMALE, 2 POS, 2mm WURTH ELEKTRONIK, 60800213421

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DEMO MANUAL

DC2769A-A-KIT

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog

Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications

subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

SCHEMATIC DIAGRAM

4 4

3 3

2 2

1 1

1MHz

0.5A

REVISION HISTORY

ECO REV DESCRIPTION APPROVED DATE

-2PRODUCTION WL 01-23-19

VIN

GND

USB 2.0

VERSION TABLE

-B

SKU#

-A

PCA ADDITIONAL PARTS

4.5 - 5.5 V

UNLESS NOTED:

RESISTORS: OHMS, 0402, 1%, 1/16W

CAPACITORS: uF, 0402, 10%, 50V

* SEE TABLE

CTx1 CTx2

1800pF

LTx1

7.5uH

49.9k

243k

CHARGE CURRENT

10mA

25mA 0.047uF 0.01uF

OPT

10uF

6.8uH

OPT

LTC6990-DCB

OPT

DATE:

IC NO.

SHEET OF

TITLE: DEMO CIRCUIT SCHEMATIC,

APPROVALS

PCB DES.

APP ENG.

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONESIZE:

SKU NO. SCHEMATIC NO. AND REVISION:

PCA BOM:

PCA ASS'Y:

DEVICES

Milpitas, CA 95035

Fax: (408)434-0507

www.analog.com

Phone: (408)432-1900

ANALOG

1630 McCarthy Blvd.

AHEAD OF WHAT'S POSSIBLE

LTC6990

SINGLE SWITCH TRANSMITTER FOR LTC4124

700-DC2771A_REV02

710-DC2771A_REV02

705-DC2771A_REV02

N/A

01-23-19

DATE:

IC NO.

SHEET OF

TITLE: DEMO CIRCUIT SCHEMATIC,

APPROVALS

PCB DES.

APP ENG.

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONESIZE:

SKU NO. SCHEMATIC NO. AND REVISION:

PCA BOM:

PCA ASS'Y:

DEVICES

Milpitas, CA 95035

Fax: (408)434-0507

www.analog.com

Phone: (408)432-1900

ANALOG

1630 McCarthy Blvd.

AHEAD OF WHAT'S POSSIBLE

LTC6990

SINGLE SWITCH TRANSMITTER FOR LTC4124

700-DC2771A_REV02

710-DC2771A_REV02

705-DC2771A_REV02

N/A

01-23-19

DATE:

IC NO.

SHEET OF

TITLE: DEMO CIRCUIT SCHEMATIC,

APPROVALS

PCB DES.

APP ENG.

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONESIZE:

SKU NO. SCHEMATIC NO. AND REVISION:

PCA BOM:

PCA ASS'Y:

DEVICES

Milpitas, CA 95035

Fax: (408)434-0507

www.analog.com

Phone: (408)432-1900

ANALOG

1630 McCarthy Blvd.

AHEAD OF WHAT'S POSSIBLE

LTC6990

SINGLE SWITCH TRANSMITTER FOR LTC4124

700-DC2771A_REV02

710-DC2771A_REV02

705-DC2771A_REV02

N/A

01-23-19

CTx1

1206

GND

SET

DIV

V+

OUT 6

GND

RED

STNCL1 TOOL, STENCIL, 700-DC2771A REV02

4.7uF

10V

CTx2

0603

BSS816NWH6327XTSA1

LB1 LABEL

LTx1

2.2k

PCB1 PCB, DC2771A REV02

10uF

6.3V

VBUS 1

D- 2

D+ 3

ID 4

GND 5

GND

9GND 10

GND 11

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DEMO MANUAL

DC2769A-A-KIT

Rev. 0

SCHEMATIC DIAGRAM

REVISION HISTORY

ECO REV DESCRIPTION APPROVED DATE

-2 PRODUCITON WL 04-15-19

PCA ADDITIONAL PARTS

UNLESS NOTED:

RESISTORS: OHMS, 0201, 1%, 1/20W

CAPACITORS: uF, 0201, 10%, 50V

CHRG

0402

4.2V BATTERY VOLTAGE

2.7V DISCONNECT BATTERY VOLTAGE

OPT

VCC

DATE:

IC NO.

SHEET OF

TITLE: DEMO CIRCUIT SCHEMATIC,

APPROVALS

PCB DES.

APP ENG.

CUSTOMER NOTICE

ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO ANALO DEVICES AND

SUPPLIED FOR USE WITH ANALOG DEVICE PARTS.

SCALE = NONESIZE:

SKU NO. SCHEMATIC NO. AND REVISION:

PCA BOM:

PCA ASS'Y:

DEVICES

Milpitas, CA 95035

Fax: (408)434-0507

www.analog.com

Phone: (408)432-1900

ANALOG

1630 McCarthy Blvd.

AHEAD OF WHAT'S POSSIBLE

LTC4124

WIRELESS Li-ION CHARGER, 10mA, 1MHz Demo

DC2774A

700-DC2774A_REV02

710-DC2774A_REV02

705-DC2774A_REV02

N/A

04-15-19

WITH LOW BATTERY DISCONNECT

DATE:

IC NO.

SHEET OF

TITLE: DEMO CIRCUIT SCHEMATIC,

APPROVALS

PCB DES.

APP ENG.

CUSTOMER NOTICE

ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO ANALO DEVICES AND

SUPPLIED FOR USE WITH ANALOG DEVICE PARTS.

SCALE = NONESIZE:

SKU NO. SCHEMATIC NO. AND REVISION:

PCA BOM:

PCA ASS'Y:

DEVICES

Milpitas, CA 95035

Fax: (408)434-0507

www.analog.com

Phone: (408)432-1900

ANALOG

1630 McCarthy Blvd.

AHEAD OF WHAT'S POSSIBLE

LTC4124

WIRELESS Li-ION CHARGER, 10mA, 1MHz Demo

DC2774A

700-DC2774A_REV02

710-DC2774A_REV02

705-DC2774A_REV02

N/A

04-15-19

WITH LOW BATTERY DISCONNECT

DATE:

IC NO.

SHEET OF

TITLE: DEMO CIRCUIT SCHEMATIC,

APPROVALS

PCB DES.

APP ENG.

CUSTOMER NOTICE

ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO ANALO DEVICES AND

SUPPLIED FOR USE WITH ANALOG DEVICE PARTS.

SCALE = NONESIZE:

SKU NO. SCHEMATIC NO. AND REVISION:

PCA BOM:

PCA ASS'Y:

DEVICES

Milpitas, CA 95035

Fax: (408)434-0507

www.analog.com

Phone: (408)432-1900

ANALOG

1630 McCarthy Blvd.

AHEAD OF WHAT'S POSSIBLE

LTC4124

WIRELESS Li-ION CHARGER, 10mA, 1MHz Demo

DC2774A

700-DC2774A_REV02

710-DC2774A_REV02

705-DC2774A_REV02

N/A

04-15-19

WITH LOW BATTERY DISCONNECT

RED

0201

LB1 LABEL

0201

CZRZ3V3B-HF

0201

CRx1

3300pF

LTC4124-LQFN

ACIN

GND 13

VSEL2

DCIN

PRECHG

LBSEL

BAT

CHRG 2

VCC 1

NTC

VSEL1

ISEL1

ISEL2

LRx1

7.2uH

STNCL1 TOOL, STENCIL, 700-DC2774A REV02

PCB1 PCB, DC2774A REV02

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DEMO MANUAL

DC2769A-A-KIT

Rev. 0

SCHEMATIC DIAGRAM

VCC

ACIN

GND

DCIN

BAT

REVISION HISTORY

ECO REV DESCRIPTION APPROVED DATE

-2PRODUCTION

PCA ADDITIONAL PARTS

UNLESS NOTED:

RESISTORS: OHMS, 0402, 1%, 1/16W

CAPACITORS: uF, 0201, 10%, 50V

OPT

6V MAX

NTC

-B

SKU#

-A

13uF

LRx1

7.2uH

CRx1

0.047uF

10mA

25mA

CHARGE CURRENT

CHRG

GND

VERSION TABLE

SEE TABLE

HI HI

LO LO

CHRG

DIS

3.2V

2.7V

LBSEL

ISEL2

VSEL1

DIS

NTC

VSEL1 VSEL2 CHARGE VOLTAGE

HI HI

HI LO

4.35V

4.20V

4.10V

4.00V

PRECHG

0201

VSEL2

0402

-C

-D

50mA

100mA

12.6uF

0.047uF

WIRELESS Li-ION CHARGER, 10mA / 25mA / 50mA / 100mA,

WITH LOW BATTERY DISCONNECT

ISEL1

HI HI

DCIN

CRx2

CHECK VERSION TABLE

3300pF

OPT

0805

X7R C0G

OPT

2.2uF

10uF

0.047uF

ISEL2

ISEL1

47uF

06-11-19

VCC VCC VCC VCC VCC

VCC

DATE:

IC NO.

SHEET OF

TITLE: DEMO CIRCUIT SCHEMATIC,

APPROVALS

PCB DES.

APP ENG.

CUSTOMER NOTICE

ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO ANALO DEVICES AND

SUPPLIED FOR USE WITH ANALOG DEVICE PARTS.

SCALE = NONESIZE:

SKU NO. SCHEMATIC NO. AND REVISION:

PCA BOM:

PCA ASS'Y:

DEVICES

Milpitas, CA 95035

Fax: (408)434-0507

www.analog.com

Phone: (408)432-1900

ANALOG

1630 McCarthy Blvd.

AHEAD OF WHAT'S POSSIBLE

LTC4124

700-DC2775A_REV02

710-DC2775A_REV02

705-DC2775A_REV02

N/A

06-11-19

DATE:

IC NO.

SHEET OF

TITLE: DEMO CIRCUIT SCHEMATIC,

APPROVALS

PCB DES.

APP ENG.

CUSTOMER NOTICE

ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO ANALO DEVICES AND

SUPPLIED FOR USE WITH ANALOG DEVICE PARTS.

SCALE = NONESIZE:

SKU NO. SCHEMATIC NO. AND REVISION:

PCA BOM:

PCA ASS'Y:

DEVICES

Milpitas, CA 95035

Fax: (408)434-0507

www.analog.com

Phone: (408)432-1900

ANALOG

1630 McCarthy Blvd.

AHEAD OF WHAT'S POSSIBLE

LTC4124

700-DC2775A_REV02

710-DC2775A_REV02

705-DC2775A_REV02

N/A

06-11-19

DATE:

IC NO.

SHEET OF

TITLE: DEMO CIRCUIT SCHEMATIC,

APPROVALS

PCB DES.

APP ENG.

CUSTOMER NOTICE

ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO ANALO DEVICES AND

SUPPLIED FOR USE WITH ANALOG DEVICE PARTS.

SCALE = NONESIZE:

SKU NO. SCHEMATIC NO. AND REVISION:

PCA BOM:

PCA ASS'Y:

DEVICES

Milpitas, CA 95035

Fax: (408)434-0507

www.analog.com

Phone: (408)432-1900

ANALOG

1630 McCarthy Blvd.

AHEAD OF WHAT'S POSSIBLE

LTC4124

700-DC2775A_REV02

710-DC2775A_REV02

705-DC2775A_REV02

N/A

06-11-19

LB1 LABEL

0603

JP2

1uF

OPT

JP7

PCB1 PCB, DC2775A REV02

CRx2

E10

STNCL1 TOOL, STENCIL, 700-DC2775A REV02

JP3

MMSZ5226B

CRx1

JP8

JP5

OPT

LRx1

LTC4124-LQFN

ACIN

GND 13

VSEL2

DCIN

PRECHG

LBSEL

BAT

CHRG 2

VCC 1

NTC

VSEL1

ISEL1

ISEL2

JP4 JP6

RT1

100k

RED

JP1

DEMO MANUAL

DC2769A-A-KIT

Rev. 0

 ANALOG DEVICES, INC. 2019

10/19

www.analog.com

ESD Caution

ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection

circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.

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conditions set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation

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and Analog Devices, Inc. (“ADI”), with its principal place of business at One Technology Way, Norwood, MA 02062, USA. Subject to the terms and conditions of the Agreement, ADI hereby grants to

Customer a free, limited, personal, temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY. Customer understands and

agrees that the Evaluation Board is provided for the sole and exclusive purpose referenced above, and agrees not to use the Evaluation Board for any other purpose. Furthermore, the license granted

is expressly made subject to the following additional limitations:Customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or distribute the Evaluation Board;and (ii) permit any Third

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DISCLAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE

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