MB39A125 Datasheet, PDF (37/64 Pages) Fujitsu Component Limited. – DC/DC Converter IC for Charging Li-ion Battery

MB39A125/126
(4) When AC Comp. is not used
When AC Comp. (ACIN (pin 7) , ACOK (pin 5) , and XACOK (pin 18) terminals) is not used as follows, connect
the ACIN (pin 7) , ACOK (pin 5) , and XACOK (pin 18) terminals to GND terminal (pin 23) .
And connect VCC terminal (pin 21) to system, as follows, to avoid the reverse current from the battery to the
VCC terminal (pin 21) .
• Connection example when AC Comp. is not used
System
AC adapter
VCC
21
ACIN
7
ACOK
XACOK
5
18
<AC Comp.>
+
−
AB
ICHG
RS1
Battery
37