QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 763
650MA STANDALONE LI-ION BATTERY CHARGER
2
10mV of the preset voltage, at which time the
charge current will begin to decrease. This is
the beginning of the Constant Voltage mode
of the charge cycle. Continue to slowly in-
crease the battery simulator power supply
while observing the CHRG LED to go out
when the charge current drops to approxi-
mately 10% of the programmed charge cur-
rent.
7
.
After the timer has timed out, slowly decrease
the battery simulator power supply. At ap-
proximately 4.1V, the charge current resumes
and a new charge cycle begins.
This is the
Recharge Threshold Voltage.
8
.
To verify the shutdown mode, move jumper
JP1 to the ‘‘OFF’’ position. This shuts the
charger down dropping the charge current to
0mA.
9
.
To verify battery drain current, remove the in-
put supply voltage. The ammeter that was
reading charge current now reads the battery
drain current. A typical value is less than 1µA.
.
