Analog Devices LINEAR DC2769A-A-KIT Quick setup guide

1
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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2
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)
50
100
90
70
40
50
20
80
60
30
10
080
DC2769AA F04
1109070 10060
BATTERY CHARGE CURRENT
(% OF PROGRAMMED CHARGE CURRENT)
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3
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
OR
+
–
POWER DC2771A-A
USING MICRO-USB
CABLE TO HOST OR A
5V ADAPTER.
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4
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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5
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:
V
IN
=1.038• π•V
IN
This equation is derived by performing voltage second
balance equation on the resonant tank inductor.
V
GS_M1
2V/DIV
V
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
CC
, 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.
V
CC
2V/DIV
V
ACIN
2V/DIV
V
BAT
2V/DIV
DC2769AA F11
Figure11. Rectification of AC Input and Regulation of VCC
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6
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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7
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
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
R1
49.9k
243k
*
**
*
CHARGE CURRENT
10mA
25mA 0.047uF 0.01uF
OPT
*
C3
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:
TM
DEVICES
Milpitas, CA 95035 Fax: [phone]
www.analog.com
Phone: [phone]
ANALOG
1630 McCarthy Blvd.
AHEAD OF WHAT'S POSSIBLE
11
NC
WL
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:
TM
DEVICES
Milpitas, CA 95035 Fax: [phone]
www.analog.com
Phone: [phone]
ANALOG
1630 McCarthy Blvd.
AHEAD OF WHAT'S POSSIBLE
11
NC
WL
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:
TM
DEVICES
Milpitas, CA 95035 Fax: [phone]
www.analog.com
Phone: [phone]
ANALOG
1630 McCarthy Blvd.
AHEAD OF WHAT'S POSSIBLE
11
NC
WL
LTC6990
SINGLE SWITCH TRANSMITTER FOR LTC4124
700-DC2771A_REV02
710-DC2771A_REV02
705-DC2771A_REV02
N/A
01-23-19
CTx1 1206
C3
1206
U1
OE
4
GND
5
SET
3
DIV
2
V+
1
OUT 6
GND
7
D1
RED
STNCL1 TOOL, STENCIL, 700-DC2771A REV02
R3
1
C1 4.7uF 10V
CTx2
0603 M1 BSS816NWH6327XTSA1
1
32
LB1 LABEL
LTx1
R2 2.2k
E1
R1
PCB1 PCB, DC2771A REV02
C2 10uF 6.3V
J1
VBUS 1
D- 2
D+ 3
ID 4
GND 5
GND
8
GND
9GND 10
GND 11
E2
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8
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
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:
TM
DEVICES
Milpitas, CA 95035 Fax: [phone]
www.analog.com
Phone: [phone]
ANALOG
1630 McCarthy Blvd.
AHEAD OF WHAT'S POSSIBLE
11
NC
WL
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:
TM
DEVICES
Milpitas, CA 95035 Fax: [phone]
www.analog.com
Phone: [phone]
ANALOG
1630 McCarthy Blvd.
AHEAD OF WHAT'S POSSIBLE
11
NC
WL
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:
TM
DEVICES
Milpitas, CA 95035 Fax: [phone]
www.analog.com
Phone: [phone]
ANALOG
1630 McCarthy Blvd.
AHEAD OF WHAT'S POSSIBLE
11
NC
WL
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
D1 RED
0201
LB1 LABEL
R2
0
0201
Z1
CZRZ3V3B-HF
R1
0
0201
CRx1 3300pF
U1 LTC4124-LQFN
ACIN
11
GND 13
VSEL2
5
DCIN
12
PRECHG
3
LBSEL
8
BAT
10
CHRG 2
VCC 1
NTC
9
VSEL1
4
ISEL1
6
ISEL2
7
LRx1 7.2uH
STNCL1 TOOL, STENCIL, 700-DC2774A REV02
PCB1 PCB, DC2774A REV02
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9
DEMO MANUAL
DC2769A-A-KIT
Rev. 0
SCHEMATIC DIAGRAM
VCC
ACIN
GND 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 GND
VERSION TABLE
SEE TABLE
*
HI
LO
HI HI
LO LO
CHRG
EN DIS
EN DIS
3.2V
2.7V
LBSEL
ISEL2
VSEL1
DIS
EN
NTC
VSEL1 VSEL2 CHARGE VOLTAGE
HI HI HI LO
LO
LO
LO
HI
4.35V
4.20V
4.10V 4.00V
PRECHG
0201
VSEL2
0402
-C -D
50mA 100mA
12.6uF 12.6uF
0.047uF
WIRELESS Li-ION CHARGER, 10mA / 25mA / 50mA / 100mA,
WITH LOW BATTERY DISCONNECT
HI LO
ISEL1
HI HI
**
**
DCIN
CRx2
CHECK VERSION TABLE
*
3300pF
OPT OPT OPT
*
0805
X7R C0G
OPT
C3
OPT
2.2uF 10uF
WL
*
0.047uF
ISEL2
HI
LO LO
LO
HI
LO
ISEL1
47uF
06-11-19
VCC VCC 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:
TM
DEVICES
Milpitas, CA 95035 Fax: [phone]
www.analog.com
Phone: [phone]
ANALOG
1630 McCarthy Blvd.
AHEAD OF WHAT'S POSSIBLE
11
NC
LTC4124
700-DC2775A_REV02
710-DC2775A_REV02
705-DC2775A_REV02
N/A
06-11-19
WL
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:
TM
DEVICES
Milpitas, CA 95035 Fax: [phone]
www.analog.com
Phone: [phone]
ANALOG
1630 McCarthy Blvd.
AHEAD OF WHAT'S POSSIBLE
11
NC
LTC4124
700-DC2775A_REV02
710-DC2775A_REV02
705-DC2775A_REV02
N/A
06-11-19
WL
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:
TM
DEVICES
Milpitas, CA 95035 Fax: [phone]
www.analog.com
Phone: [phone]
ANALOG
1630 McCarthy Blvd.
AHEAD OF WHAT'S POSSIBLE
11
NC
LTC4124
700-DC2775A_REV02
710-DC2775A_REV02
705-DC2775A_REV02
N/A
06-11-19
WL
LB1 LABEL
E5
E6
E4
C3 0603
JP2
C2
1uF
OPT
JP7
E3
PCB1 PCB, DC2775A REV02
CRx2
E10
STNCL1 TOOL, STENCIL, 700-DC2775A REV02
JP3
E1
Z1
MMSZ5226B
CRx1
JP8
JP5
R1 0
OPT
LRx1
R2
0
U1 LTC4124-LQFN
ACIN
11
GND 13
VSEL2
5
DCIN
12
PRECHG
3
LBSEL
8
BAT
10
CHRG 2
VCC 1
NTC
9
VSEL1
4
ISEL1
6
ISEL2
7
E2
E9
JP4 JP6
E8
E7
RT1 100k
D1 RED
JP1
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10
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.
Legal Terms and Conditions
By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and
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
Board until you have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you (“Customer”)
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
Party to access the Evaluation Board. As used herein, the term “Third Party”includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is
NOT sold to Customer;all rights not expressly granted herein, including ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALITY. This Agreement and the Evaluation Board shall all
be considered the confidential and proprietary information of ADI. Customer may not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of
use of the Evaluation Board or termination of this Agreement, Customer agrees to promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile
or reverse engineer chips on the Evaluation Board. Customer shall inform ADI of any occurred damages or any modifications or alterations it makes to the Evaluation Board, including but not limited
to soldering or any other activity that affects the material content of the Evaluation Board. Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS
Directive. TERMINATION. ADI may terminate this Agreement at any time upon giving written notice to Customer. Customer agrees to return to ADI the Evaluation Board at that time. LIMITATION OF
LIABILITY. THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED “AS IS”AND ADI MAKES NO WARRANTIES OR REPRESENTATIONS OF ANY KIND WITH RESPECT TO IT. ADI SPECIFICALLY
DISCLAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTY OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS. IN NO EVENT WILL ADI AND ITS
LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER’S POSSESSION OR USE OF THE EVALUATION BOARD, INCLUDING
BUT NOT LIMITED TO LOST PROFITS, DELAY COSTS, LABOR COSTS OR LOSS OF GOODWILL. ADI’S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE AMOUNT OF ONE
HUNDRED US DOLLARS ($100.00). EXPORT. Customer agrees that it will not directly or indirectly export the Evaluation Board to another country, and that it will comply with all applicable United States
federal laws and regulations relating to exports. GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the substantive laws of the Commonwealth of Massachusetts
(excluding conflict of law rules). Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby submits
to the personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International Sale of Goods shall not apply to this Agreement and is expressly disclaimed.
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