MITSUMI
Application Circuit
Protection of Lithium-Ion Batteries (for Double-Protect) MM1451
Delay time Td(S) = 7 CCt (µF)
Note 1: Can support 1, 2 or 3 cells by shorting each cell. However, be sure to connect a battery for V3 cell.
V3 cell may not operate correctly when shorted.
Note 2: When connecting batteries, be sure to connect in the following order: GND V3, and VCC V1OR
V2.
Note 3: Output may go ON momentarily when starting up power supply. If this error output during startup
becomes a problem, connect the VCC pin last.
Note 4: Operation can not be guaranteed for connections other than the above.
Note 5: The input resistance for each cell should be 1kΩ or lower. Also, please select the appropriate value
for the external capacitor according to the usage environment.
Timing Chart
4.45V
4.40V
V1~V3
Ct
1.8V
0.75V
OUT
1.5S
OUT
(at Ct short)
(at Ct open)
Note: Output goes high simultaneously with overcharge detection at Ct pin short and open.