Linear ADI Power DC3080A-KIT Quick setup guide

1
DEMO MANUAL DC3080A-KIT
Rev. 0
DESCRIPTION
LTC4126-ADJ
10mA Wireless Charger
Demonstration Kit
Demonstration Kit DC3080-KIT features LTC
®
4126-
ADJ, wireless Li-Ion Charger with 1.2V Step-Down DC/
DC Converter. This kit comprises a wireless transmitter
DC3081A, a wireless receiver DC3078A and two 6mm
application-sized receivers DC3079A.
DC3078A wireless charger receiver incorporates an exter-
nal trickle charge circuit that reduces the charge current to
1 x DC3078A (LTC4126-ADJ) Receiver Demo Board
2 x DC3079A (LTC4126-ADJ) 6mm Application-Sized Receiver Demo Board
1 x DC3081A (LTC6990) Transmitter Demo Board
All registered trademarks and trademarks are the property of their respective owners.
PERFORMANCE SUMMARY
BOARD PHOTO
TYPICAL APPLICATION SCHEMATIC
1mA when a deeply discharged battery with voltage lower
than 2.8V is plugged in. The combination of DC3081A
transmitter and DC3078A receiver can charge a single
Li-Ion battery at up to10mA with an airgap of 4.0mm to
8.0mm.
Design files for this circuit board are available.
Specifications are at TA= 25°C
Figure1. 10mA Wireless Charging System Using DC3078A and DC3081A
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN DC3081A Voltage Input 4.5 5.5 V
IBAT DC3078A Charge Current in CC Mode 10 mA
VBAT DC3078A Float Voltage 4.2 V
fDRIVE DC3081A Drive Frequency 205 kHz
fTX_TANK DC3081A Resonant Tank Frequency 255 kHz
fRX_TANK DC3078A Resonant Tank Frequency 203 kHz
AIR-GAP Airgap Between DC3078A and DC3081A IBAT = 10mA 4 8 mm
243k
4.7µF
C
TX
57nF
LT X
6.8µF
M1
L
RX
13µF
C
RX
47nF
R
NTC
R
BIAS
100k
LED
V
1k
V
30.1k
2.2µF
6.34k
1µF
8.87k
V
IN
4.5V TO 5.5V
200mA
OE
LTC6990
SET
DIV
V+
GND
OUT
AIR-GAP
4mm TO 8mm
DC3078A
ACIN
STAT1
STAT2
ACPR
Li-Ion
Battery
BAT
NTC
V
CC
+
DC3081A
10mA
PBEN
LTC4126-ADJ
GND
EN
DIGITAL
I/O
PUSHBUTTON
CHRG
CC
OUT
DIS
IN
GND
OUT
1.2V
40mA
PROG
TRICKLE CHARGE WHEN
V
BAT
IS BELOW 2.8V
ADM8642T100

2
DEMO MANUAL DC3080A-KIT
Rev. 0
BOARD PHOTO
Figure2. DC3078A Front Figure3. DC3078A Back
Figure4. DC3079A Front Figure5. DC3079A Back
Figure6. DC3081A Front Figure7. DC3081A Back

3
DEMO MANUAL DC3080A-KIT
Rev. 0
QUICK START PROCEDURE
Refer to Figure9 and Figure11 for the proper measure-
ment equipment setup and follow the procedure below:
1. Connect a voltage source PS1 and a 50Ω resistor RBAT1
between the BAT and GND turrets of the DC3078A as
shown in Figure9. PS1 and RBAT1 make up the battery
emulator. Typical power supply cannot sink current. By
adding a resistor across the power supply inputs that
draws more current than the maximum battery charge
current, the power supply only sources current at all
time. Connect a voltmeter VM1 to measure the BAT pin
to GND voltage. Connect an ammeter AM1 to measure
the charge current to the battery emulator.
2. Connect a voltage source PS2 between the VIN and
GND turrets of the DC3081A, as shown in Figure10.
3. Set PS1 to 2.5V, and power up PS1. Set PS2 to 5V, and
power up PS2. The LED indicator on DC3078A receiver
board should start blinking slowly, indicating power is
delivered to the receiver. AM1 should read around 1mA
trickle charge current.
4. Slowly increase PS1 until VM1 reads 3.6V. The charge
current should jump up to 10mA. Further increase PS1
voltage slowly, until VM1 reads 4.2V. The charge cur-
rent should drop to zero.
5. Connect an electronic load LD1 and a voltmeter between
OUT and GND pin. If EN jumper is at ON position, VM2
should read 1.2V. If not, OUT can be turned on/off by
the pushbutton.
6. When OUT is on, set LD1 to CC mode. Slowly tune up
the load current to 40mA. VM2 should be regulated at
around 1.2V
7. Turn off LD1, PS2 and PS1.
8. To test DC3079A, 6mm application-sized demo, please
remove the DC3078A away from DC3081A. Place
DC3079A on top of the DC3081A transmitter coil LTx1.
9. Turn on PS1. The LED on DC3079A should start blink-
ing slowly, indicating power is delivered to the receiver.
V
BATT
I
CHRG
TIME (MINS)
0
40
80
120
160
200
240
280
320
360
400
0
1
2
3
4
5
6
7
8
9
10
11
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4.0
4.1
4.2
4.3
CHARGE CURRENT (mA)
BATTERY VOTLAGE (V)
Figure8. DC3078A and DC3081A Wireless Charging Profile with
19mAh Li-Ion Battery

4
DEMO MANUAL DC3080A-KIT
Rev. 0
TEST SETUP
Figure9. Test Setup for DC3078A Receiver
Figure10. Test Setup for DC3081 Transmitter
PS2
4
.5V-5.5V
AM1
RBAT1
50
Ω
PS1
2
.5V-4.2V
V
VM1
A
BATTERY
EMULATOR
V
LD1
0
-40mA
VM2

5
DEMO MANUAL DC3080A-KIT
Rev. 0
TEST SETUP
Figure11. Test Setup for DC3079A 6mm Application-Sized Receiver
Figure12. DC3078A and DC3081A Combination

6
DEMO MANUAL DC3080A-KIT
Rev. 0
THEORY OF OPERATION
The DC3080A-KIT demonstrates the operation of
LTC4126-ADJ, wireless battery charger. This kit is com-
posed of a DC3081A transmitter board, a DC3078A
receiver board and two DC3079A 6mm application-sized
receiver boards.
DC3078A Wireless Charger Receiver Board
DC3078A features the LTC4126-ADJ, a wireless Li-Ion
charger with 1.2V step-down DC/DC converter. The charge
current in CC mode is 10mA. This charge current is pro-
grammed by the resistor on PROG pin of LTC4126-ADJ.
To efficiently receive energy from the transmitter, the
resonant frequency of this receiver board is set up to be
203kHz, matching the drive frequency of the transmitter
board. The LTC4126-ADJ rectifies the resonant AC volt-
age to generate VCC. When enough energy is received
by the LTC4126-ADJ, V
CC
is kept between 5-5.5V by a
wireless power manager. As VCC voltage reaches 5.5V,
the resonant tank will be shunted to GND. In this way,
receiver stops receiving energy and V
CC
starts to drop
until it reaches 5V. The resonant tank also receives less
power when the shunting circuit is engaged, as the reso-
nant frequency is detuned from the transmitter frequency.
V
CC
2V/DIV
V
ACIN
2V/DIV
V
BAT
2V/DIV
Figure13. Rectification of AC Input and Regulation of DC Rail
Voltage
The transmitter board also includes an external circuit
to achieve the trickle charge function. When a low volt-
age (<2.8V) battery is connected, the charge current is
reduced to 1mA until BAT pin voltage rises over 2.8V.
When BAT pin is lower than 2.8V before charging, the
comparator on board will inject current to the PROG pin
resistor once VCC is available. The effective current com-
ing out from PROG pin is reduced. As PROG pin output
current is proportional to charge current, the charge cur-
rent is reduced. When the battery voltage is charged up
to above 2.8V, the comparator stops injecting current and
the charge current increases to the original programmed
level.
DC3081A Wireless Charger Transmitter Board
The DC3081A is a wireless power transmitter board,
using LTC6990 TimerBlox. The NMOS M1 is driven by
a 50% duty cycle square wave generated by the oscilla-
tor. During the first half of the cycle, M1 is switched on
and the current through the resonant tank rises linearly.
During the second half of the cycle, M1 is switched off and
the current circulates through the resonant tank. When
the transmit resonant tank frequency is set to about 1.29
times the driving frequency, M1 is turned on at zero volt-
age, and the switching loss is significantly reduced. The
peak voltage of the transmit resonant tank that appears
at the drain of M1 is :
VIN = 1.038 × π × VIN (1)
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
Figure14. ZVS Operation on M1

7
DEMO MANUAL DC3080A-KIT
Rev. 0
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
DC3078A Evaluation Receiver: Required Circuit Components
1 1 C1 CAP., 2.2uF, X5R, 16V, 20%, 0402 TDK, C1005X5R1C225M050BC
2 1 C2 CAP., 1uF, X5R, 16V, 10%, 0402 AVX, 0402YD105KAT2A
3 1 C4 CAP CER 2.2UF 6.3V X5R 0201 MURATA, GRM033R60J225ME47D
4 1 CRx1 CAP., 0.047uF, C0G, 25V, 5%, 0805, AEC-Q200 KEMET, C0805C473J3GACAUTO
5 1 LRx1 IND., 13uH, WIRELESS CHRG. COIL RX. Qi, 10%,
0.8A, 500mOHMS, 10mm Dia x 1.68mm H,
WURTH ELEKTRONIK, 760308101208
6 1 R4 RES., 8.87k OHMS, 1%, 1/16W, 0402, AEC-Q200 ROHM, MCR01MZPF8871
7 1 R5 RES., 30.1k OHMS, 1%, 1/16W, 0402, AEC-Q200 NIC, NRC04F3012TRF
8 1 R7 RES., 0 OHM, 1/16W, 0402 NIC, NRC04ZOTRF
9 1 R9 RES 1 KOHM, ERJ1G Series, 25V, 0201, 50 mW PANASONIC, ERJ-1GEJ102C
10 1 U1 IC, Li-ion Charger with Step-Down Reg. for Hearing
Aids with Adj. Current, LQFN-12
ANALOG DEVICES, INC., LTC4126EV-ADJ#PBF
DC3078A: Additional Circuit Components
1 1 D1 LED, RED, WATER-CLEAR, 0603 LITE-ON, LTST-C193KRKT-5A
2 1 R2 RES., 0 OHM, 5%, 1/16W, 0402 ROHM, MCR01MZPJ000
DC3078A: Hardware, For Demo Board Only
1 2 E1-E14 TEST POINT, TURRET, 0.064" MTG. HOLE, PCB
0.062" THK
MILL-MAX, 2308-2-00-80-00-00-07-0
2 1 JP1, JP2 CONN., HDR, MALE, 1x3, 2mm, VERT, ST, THT WURTH ELEKTRONIK, 62000311121
2 1 XJP1, XJP3 CONN., SHUNT, FEMALE, 2 POS, 2mm WURTH ELEKTRONIK, 60800213421
DC3079A 6mm Receiver: Required Circuit Components
1 1 COUT1 CAP., 2.2uF, X5R, 16V, 20%, 0402 TDK, C1005X5R1C225M050BC
2 1 CRx1 CAP., 0.068uF, X7R, 25V, 10%, 0402, AEC-Q200 TDK, CGA2B3X7R1E683K050BB
3 1 LRx1 IND., 7.2uH, WIRELESS CHRG. COIL RX., +/-10%,
500mA, 440mOHMS, 6mmX2mm, 1 COIL, 1 LAYER
WURTH ELEKTRONIK, 760308101216
4 1 R1 RES., 8.87k OHMS, 1%, 1/20W, 0201, AEC-Q200 PANASONIC, ERJ1GNF8871C
4 1 RT1 RES., 100k OHMS, 1%, 0201, NTC THERMISTOR TDK, NTCG064EF104FTBX
5 1 U1 IC, 100mA Wireless Li-Ion Charger with Low Battery
Disconnect, LQFN-12
ANALOG DEVICES, INC., LTC4124EV#PBF
DC3079A: Additional Circuit Components
1 1 D1 LED, RED, CLEAR, 0402, SMD ROHM, SML-P11UTT86
2 1 Z1 DIODE, ZENER, 3.3V, 100mW, 0201 COMCHIP, CZRZ3V3B-HF

8
DEMO MANUAL DC3080A-KIT
Rev. 0
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
DC3081A Transmitter: Required Circuit Components
1 1 C1 CAP., 4.7uF, X5R, 10V, 10%, 0402 TDK, C1005X5R1A475K050BC
2 1 C3 CAP., 0.1uF, X5R, 10V, 10%, 0402 AVX, 0402ZD104KAT2A
3 1 CTx1 CAP., 0.047uF, C0G, 50V, 5%, 1206 MURATA, GCM31M5C1H473JA16L
4 1 CTx2 CAP., 0.01uF, C0G, 25V, 5%, 0603 KEMET, C0603C103J3GACTU
5 1 LTx1 IND., 6.8uH, WIRELESS CHRG. COIL, 10%, 2.5A,
125mOHMS, 20.5mm Dia x 2.6mm H
WURTH ELEKTRONIK, 760308101104
6 1 R3 RES., 243k OHMS, 1%, 1/16W, 0402, AEC-Q200 NIC, NRC04F2433TRF
7 1 M1 XSTR., MOSFET, N-CH, 20V, 6A, SOT23-3 VISHAY, Si2312CDS-T1-GE3
8 1 U1 OSCILLATOR, TimerBlox: VCO, 5pF, 90ppm, DFN-5 ANALOG DEVICES, LTC6990CDCB#PBF
DC3081A: Additional Circuit Components
1 1 D1 LED, RED, WATER-CLEAR, 0603 LITE-ON, LTST-C193KRKT-5A
2 1 C4 CAP., 100uF, X5R, 6.3V, 20%, 1206 MURATA, GRM31CR60J107ME39L
3 1 R1 RES., 2.2k OHMS, 5%, 1/16W, 0402, AEC-Q200 VISHAY, CRCW04022K20JNED
4 1 R2 RES., 1 OHM, 1%, 1/16W, 0402, AEC-Q200 VISHAY, CRCW04021R00FKED
DC3081A: Hardware, For Demo Board Only
1 2 E1, E2 TEST POINT, TURRET, 0.064" MTG. HOLE, PCB
0.062"
MILL-MAX, LTST-C193KRKT-5A
1 1 J1 CONN., uUSB 2.0, RCPT., 5-PIN, 1PORT, REVERSE
MOUNT, R/A HORZ., TYPE B, FLANGELESS
TE CONNECTIVITY, 1932788-1

9
DEMO MANUAL DC3080A-KIT
Rev. 0
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D D C C B B A A
EN
VCC
ACIN
CHRG
ACPR
STAT1 STAT2
PBEN
BAT
OUT
GND
GND
1.2V
REVISION HISTORY
ECO REV DESCRIPTION APPROVED DATE
-02 PRODUCTION W. Li 07-29-2020
UNLESS NOTED: RESISTORS: OHMS, 0402, 1%, 1/16W CAPACITORS: uF, 0402, 10%, 50V
40mA
ON
OFF
OPT
6V MAX
NTC DIS EN
EXT NTC
CHRG
10mA WIRELESS LI-ION CHARGER WITH 1.2V STEP-DOWN DC/DC CONVERTER AND TRICKLE CHARGE CONTROLLER
4.2V
10mA
GND
GND
fr = 203.6kHz
PCA ADDITIONAL PARTS
LTC4126EV-ADJ
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
CUSTOMER NOTICE
SCHEMATIC
SCALE = NONE
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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.
11
NC W. Li
LTC4126-ADJ
DEMO CIRTCUIT 3078A 02
07-29-2020
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
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PCB DES.
APP ENG.
CUSTOMER NOTICE
SCHEMATIC
SCALE = NONE
www.analog.com
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.
11
NC W. Li
LTC4126-ADJ
DEMO CIRTCUIT 3078A 02
07-29-2020
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
CUSTOMER NOTICE
SCHEMATIC
SCALE = NONE
www.analog.com
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.
11
NC W. Li
LTC4126-ADJ
DEMO CIRTCUIT 3078A 02
07-29-2020
C3
OPT
0805
E2
E3
LB1 LABEL
E9
E11
PCB1 PCB, DC3078A REV02
E4
E7
R4
8.87k
E5
E6
R8
6.34k
C4
2.2uF
0201 R6
OPT
JP1
D1
RED
0603 E8
JP2
R1 OPT
S1 SPST-NO
R7
0
C2
1uF
C1
2.2uF
R5
30.1k
R3
OPT
E12
CRx1 0.047uF
25V
0805
E13
E14
E1
LRx1
13uH
760308101208
U1
ACIN 7
GND
13
PROG
4
VCC 11
PBEN
3
ACPR
5
STAT1 10
EN
2
OUT 12
BAT 8
CHRG
6
STAT2 9
NTC
1
E10
R9
1k
0201
Z1 MMSZ5226B
R2 0
U2
ADM8642
OUT
C2
VCC A1
GND1
A2
DIS B1 VIN C1
GND2
B2
CHRG
BAT
BAT
VCC
PROG CHRG
VCC
VCC
BAT
PROG

10
DEMO MANUAL DC3080A-KIT
Rev. 0
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D D C C B B A A
REVISION HISTORY
ECO REV DESCRIPTION APPROVED DATE
-02 PROD. FAB W.Li 6/22/2020
PCA ADDITIONAL PARTS
UNLESS NOTED: RESISTORS: OHMS, 0402, 1%, 1/16W CAPACITORS: uF, 0402, 10%, 50V
0603
10mA 6mm APPLICATION-SIZED CHARGER WITH
1.2V STEP-DOWN DC-DC CONVERTER
LTC4126EV-ADJ
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
CUSTOMER NOTICE
SCHEMATIC
SCALE = NONE
www.analog.com
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.
11
NC W.Li
LTC4126-ADJ
DEMO CIRCUIT 3079A 02
06-22-2020
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
CUSTOMER NOTICE
SCHEMATIC
SCALE = NONE
www.analog.com
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.
11
NC W.Li
LTC4126-ADJ
DEMO CIRCUIT 3079A 02
06-22-2020
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
CUSTOMER NOTICE
SCHEMATIC
SCALE = NONE
www.analog.com
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.
11
NC W.Li
LTC4126-ADJ
DEMO CIRCUIT 3079A 02
06-22-2020
LB1 LABEL
Z1
CZRZ3V3B-HF
3.3V
LRx1
7.2uH
6mmX2mm
760308101216
COUT1 2.2uF
20%
16V
D1
RED
CRx1
0.068uF
25V
PCB1 PCB, DC3079A REV02
R1
8.87k
0201
U1
ACIN
7
GND
13
PROG
4
VCC
11
PBEN
3
ACPR 5
STAT1 10
EN
2OUT 12
BAT
8
CHRG
6 STAT2 9
NTC
1
BAT

11
DEMO MANUAL DC3080A-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
5
5
4
4
3
3
2
2
1
1
D D C C B B A A
4.5 - 5.5 V 0.5A
UNLESS NOTED: RESISTORS: OHMS, 0402, 1%, 1/16W CAPACITORS: uF, 0402, 10%, 50V
VIN
GND
PCA ADDITIONAL PARTS
REVISION HISTORY
ECO REV DESCRIPTION APPROVED DATE
-01 PRODUCTION W. Li 07-29-2020
1206
USB 2.0
fr = 255.6 kHz
fdrive = 205.8 kHz
SINGLE SWITCH TRANSMITTER FOR LTC4126-ADJ WITH 10mA CHARGE CURRENT
LTC6990CDCB
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
CUSTOMER NOTICE
SCHEMATIC
SCALE = NONE
www.analog.com
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.
11
NC W. Li
LTC6990
DEMO CIRCUIT 3081A 01
07-29-2020
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
CUSTOMER NOTICE
SCHEMATIC
SCALE = NONE
www.analog.com
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.
11
NC W. Li
LTC6990
DEMO CIRCUIT 3081A 01
07-29-2020
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
CUSTOMER NOTICE
SCHEMATIC
SCALE = NONE
www.analog.com
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.
11
NC W. Li
LTC6990
DEMO CIRCUIT 3081A 01
07-29-2020
D1 RED
21
CTx2
0.01uF
0603
LB1 LABEL MH1 TAPE,3/4" x 36yds,DOUBLE SIDED POLYIMIDE KAPTON
LTx1
6.8uH 760308101104
E1
PCB1 PCB, DC3081A REV01 STNCL1 TOOL, STENCIL, 700-DC3081A REV01
R3
243k
C3
0.1uF 10V
J1
VBUS 1
D- 2
D+ 3
ID 4
GND 5
GND
8
GND
9GND 10
GND 11
R1
2.2k
C4
100uF
6.3V
1206
M1 SI2312CDS-T1-GE3
3
1
2
CTx1
0.047uF
1206
U1
OE
4
GND
5
SET
3
DIV
2
V+
1
OUT 6
GND
7
R2 1
C2 OPT
C1
4.7uF 10V
E2

12
DEMO MANUAL DC3080A-KIT
Rev. 0
 ANALOG DEVICES, INC. 2021
03/21
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
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(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
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