Linear Analog Devices LTC4124, Demo Manual

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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 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