Quick Start Procedure - Linear Technology DC1812A Demo Manual

DEMO MANUAL DC1812A

Quick start proceDure

Demonstration circuit 1812A is easy to set up to evalu-
ate the performance of the LTC2943. Refer to Figure 2
for proper measurement equipment setup and follow the
procedure below.
1. Connect a Li-Ion battery across V_BAT and GND. Multiple
Li-ion batteries can also be used as long as the total
voltage does not exceed the operating voltage of the
device. The LTC2943 has a maximum operating voltage
of 20V, so for a 4.2V lithium ion battery the maximum
cell count would be 4 cells.
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. Use SENSE
points to read voltage across the sense resistor.
2
3. Connect a 2.7V to 5.5V battery charger supply across
4. Connect a DC590 to 14-pin connector J1 for evaluation
5. If a host I
6. Read and write to the LTC2943 through I
+ –
and SENSE test
7. Through I
8 If AL/CC is set for charge complete, use pushbutton
Figure 2. DC1812A Basic Setup
V_CHRG/LD and GND for battery charge measurement.
Up to 500mA supplied to the battery can be measured
with the board default 100mΩ sense resistor. Use
+ –
SENSE and SENSE test points to read voltage across
the sense resistor.
with QuikEval, or connect a host controller I
the SDA, SCL and GND test turrets.
2
C controller is used, then provide a bus pull-up
voltage to the +5V turret, else start QuikEval software
on PC.
2
C, configure the AL/CC pin. Set JP1 accord-
ingly.
switch S1 to simulate a logic low from a controller to
indicate a fully charged battery.
2
C bus to
2
C.
dc1812af