MB3874 Fujitsu Media Devices, MB3874 Datasheet - Page 19

• Manufacturer Part Number: MB3874
• Description: DC/DC Converter IC for Parallel Charging
• Manufacturer: Fujitsu Media Devices

If there is an imbalance in charge current (I1, I2) under constant-voltage control, voltage is controled at the side
with a lower battery voltage and thus the battery voltage at one side is higher than that at the other by the voltage
difference between the reverse-current preventive diodes (D1, D2) and between the sense resistors (Rs
Pay attention to the voltage/current characteristics of the reverse-current preventive diode (D1, D2) not to let it
exceed the overcharge stop voltage.
NOTE ON AN EXTERNAL REVERSE-CURRENT PREVENTIVE DIODE
21
20
19
V
OUT
VH
CC
VIN
(16 V/19 V)
to 24 pin to 1 pin
to 13 pin
D2
D1
I2
I1
C
A
R
R
S2
S1
to 12 pin
B
D
BATT1
12.6 V/16.8 V
BATT2
12.6 V/16.8 V
MB3874/MB3876
Battery 1
Battery 2
1
, Rs
2
)
19