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QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 551
Typical Demo Board Specifications
Input Voltage Range (V
Charge Voltage (V
BAT
Charge Current I
BAT
Charge Current I BAT (trickle current mode)
C/5 CHRG LED Threshold Level
Trickle Charge Threshold Voltage
Battery Drain Current with V IN Removed
* Main cause of drain current is due to Schottky diode leakage current.
Figure 1. Test Setup
Measure Input Voltage
Input
Power
+
Supply
Volt
Meter
-
0 to 25V
@3A
SHDN/RUN Jumper
CHARGE LED
NTC Thermister (10k Resistor)
Test Equipment Required for Demo Board Evaluation
Lab power supply for input power
Digital multimeter for measuring input voltage (V
Digital multimeter for measuring battery voltage(V
Digital multimeter for measuring charge current
*Battery Simulator
Li-Ion cell or
LITHIUM-ION BATTERY CHARGER WITH CHARGE TERMINATION
)
IN
) (constant voltage mode)
(constant current mode)
Measure Charge Current
100mV/Amp
LTC4002EDD
Demo DC551A
BAT
+V
IN
EXT
NTC
GND
GND
TECHNOLOGY
(408)432-1900
)
IN
BAT
5.2V to 24V
4.2V ±1%
3A ±8%
350mA ± 20%
750mA ± 25%
2.9V
<20µA *
(I
)
BAT
Volt
Meter
0.1 Ohm
1%
Volt
Current
Meter
Sense
Resistor
Measure Charger
Output Voltage (V
BAT
0 to 25V @ 3A
3-1/2 digits
)
4-1/2 digits
3-1/2 digits
4.2V Rechargeable Li-Ion Cell
Li-Ion Battery Simulator
Battery
Simulator
Preload
Bench Power
Resistors
Supply
+
0V to 5V
@6A
-
Course
3 ea.
2 Ohm
Voltage Adjust
10W
)
Fine
2
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