Linear Technology LTC4007 Quick Start Manual

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 498
3 AND 4 CELL LI-ION BATTERY CHARGER BOARD WITH BUILT IN CHARGE TERMINATION

DESCRIPTION

Demonstration circuit 498 is a single battery stand-
alone battery charge controller with built in charge
termination featuring the LTC
is 13 to 20V. The charger output voltage is pro-
grammed by jumpers to support 3- and 4-Cell Li-ion
batteries with a cell voltage of 4.1V or 4.2V/Cell. The
maximum charge current is 4A. The demo board is
initially configured for 12.6V Li-ion batteries. The
board will automatically charge a battery to termina-
tion as soon as input power is applied with a battery
connected prior to power up. Status LEDs are pro-
vided for CHG, ACP, FAULT, FLAG, ICL and LOBAT.
An onboard NTC thermistor is provided. Although this
Table 1.

Performance Summary

PARAMETER
Maximum Input Voltage
Recommended Minimum Input Voltage
Input Current Limit
Maximum Charge Current

QUICK START PROCEDURE

Demonstration circuit 498 is easy to set up to eva-
luate the performance of the LTC4007. Refer to Figure
1 for proper measurement equipment setup and fol-
low the procedure below:
1. Connect the input power source to DCIN termin-
als J1 or DC
IN
pable of handling 4A of current within an 11 to 20V
range. The input supply MUST be greater than the
full voltage value of the battery to allow a full
charge to take place.
2. Connect the load to VOUT and GND terminals.
3. Configure the jumpers for your specific battery.
Arrow.com.
Downloaded from
4007. The input voltage
®
CONDITION
Limited by input Capacitor Volt Ratings.
Vin > Vbat Termination voltage.
Vin > Vbatmax > 6V
and GND using a power supply ca-
charger is not a smart battery charger, a popular
smart battery connector is provided that can be used
for data logging with the optional DC1223A-B demo
board and software. To be clear, you do NOT need a
smart battery to use this board. The optional
DC1223A-B SMBUS to USB Port Adapter and asso-
ciated software to monitor a smart battery are for
demonstration purposes only. Contact your LT repre-
sentative for ordering a DC1223A-B.
Design files for this circuit board are available. Call
the LTC factory.
LTC is a registered trademark of Linear Technology Corporation.
VALUE
20V +/- 10 %
13V when using a 12.6V Li-ion battery.
3.5A
4A +/- 5%
When measuring the input or output voltage
NOTE:
ripple, care must be taken to avoid a long ground lead
on the oscilloscope probe. Measure the input or out-
put voltage ripple by touching the probe tip directly
across the V or V and GND terminals. See Figure
IN OUT
2 for proper scope probe technique.
4. Plug in the battery. The industry standard 5 Pin
AMP Smart Battery connector is provided as well
as generic soldering Test Points for hardwire con-
nections.
5. Turn on the input power supply.
6. Optionally use the provided DC1223A-B demon-
stration software to control and configure the
DC498A.
LTC4007
1