QUICK START GUIDE FOR DEMONSTRATION CIRCUIT DC512B
4A SMART BATTERY CHARGER
2
QUICK START PROCEDURE
Demonstration circuit 512B is easy to set up to
evaluate the performance of the LTC4100. Refer to
Figure 1 for proper measurement equipment setup
and follow the procedure below.
1.
Set the jumpers according to the voltage and cur-
rent specifications of the pack under evaluation.
2.
With all power off, connect input power supply,
and meters as shown in Figure 1.
3.
Preset the system load to 0A and the input sup-
ply to 0V, 0A current limit.
4.
Turn on the supply, setting the current limit to
3.5A.
5.
Adjust the input voltage to the desired value, up
to 25V.
6.
Connect the battery to begin charging. Plug in
the battery. An industry standard 5-pin Smart Bat-
tery connector is provided as well as generic sol-
dering test points for hardwire connections.
Optional
1.
For different ILIM & VLIM settings, adjust JP1
& JP3 as necessary.
2.
To disable charging through hardware, connect
CHGEN to GND.
3.
To probe the SMBus communication or connect to
an external host, connect leads to SDA, SCL, and
GND.
4.
To use an external logic supply, disable the on-
board 5V linear regulator by setting JP2 to OFF.
Note:
Not supplying an alternative VLOGIC will
disable the LEDs as well as SMBus communica-
tions, which prevents charging. It is always rec-
ommended to supply a VLOGIC at all times.
5.
Use DC1223A-B USB-to-SMBus demoboard to
control and configure the provided DC512B evalu-
ation software.
Please refer to the LTC4100 datasheet for additional information.
