Quick Start Procedure - Linear Technology DC1496C Demo Manual

DEMO MANUAL DC1496C

QUICK START PROCEDURE

Demonstration circuit 1496C is easy to set up to evaluate
the performance of the LTC2941/LTC2942/LTC2941-1/
LTC2942-1. Refer to Figure 2 for proper measurement
equipment setup and follow the procedure below.
1. Connect a 1-cell Li-Ion battery across V_BAT and GND.
2. Connect a load across V_CHRG/LD and GND for battery
discharge measurement. Up to 500mA supplied from
the battery can be measured with the board default
100mΩ sense resistor or 50mΩ internal resistor. Use
+
SENSE and SENSE
the sense resistor.
3. Connect a 2.7V to 5.5V battery charger supply across
V_CHRG/LD and GND. Up to 500mA supplied to the
battery can be measured with the board default 100mΩ
sense resistor. Use SENSE
read voltage across the sense resistor.
CHARGER
2
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–
test points to read voltage across
+ –
and SENSE test points to
+
LOAD
–
TO QuikEval
Figure 2. DC1496C Basic Setup
4. Connect a DC590 to 14-pin connector J1 for evaluation
with QuikEval, or connect a host controller I
the SDA, SCL and GND test turrets.
5. Set JP1 to QuikEval if a DC590 is present. Otherwise
set JP1 to Bat/Chrg for bus pull-up to the battery, or
float JP1 and supply a bus pull-up voltage to VP.
6. Read and write to the LTC2941/LTC2942 through I
2
7. Through I C, configure the AL/CC pin. Set JP2
accordingly.
8 If AL/CC is set for charge complete, use pushbutton
switch S1 to simulate a logic high from a controller to
indicate a fully charged battery.
V
SENSE
TO MICROCONTROLLER
2
C bus to
2
C.
+
BATTERY
1-CELL
Li-Ion
–
BUS PULL-UP
VOLTAGE
dc1496cfb