1
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
, the DC2775A-A, featuring
, 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 T
A
= 25°C
Figure 1. DC2771A-A Picture
Figure 2. DC2775A-A Picture
Figure 3. DC2774A Picture
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
IN
DC2771A-A Voltage Input
I
VIN
≤ 100mA
4.5
5.5
V
I
IN
DC2771A-A V
IN
Current
V
IN
= 5V
100
mA
V
BAT
DC2775A Battery Charge Voltage
V
SEL1
= V
CC
, V
SEL2
= GND
4.2
V
V
BAT
DC2775A-A Battery Charge Voltage
V
SEL1
= HI, V
SEL2
= HI
4.35
V
V
SEL1
= HI, V
SEL2
= LO
4.2
V
V
SEL1
= LO, V
SEL2
= HI
4.1
V
V
SEL1
= LO, V
SEL2
= LO
4.0
V
I
BAT
DC2775A-A Charge Current
V
BAT
= 4.0V, I
SEL1
= I
SEL2
= GND
10
mA
Air-Gap
Separation Between L
TX
and L
RX
0
0.5
0.75
mm
f
DRIVE
DC2771A-A Drive Frequency
1
MHz
f
TX_TANK
DC2771A-A Resonant Tank Frequency
1.4
MHz
f
RX_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
