MM3638 Series

MM3638 series are protection IC for lithium-ion and lithium-polymer battery. MM3638 protects the battery pack from overcharge, overdischarge, and overcurrent, etc. by controlling FET SW.
In the One-cell battery pack, on resistance of the FET SW has been used for overcurrent detection. MM3638 realize overcurrent protection with high accuracy and with no temperature dependence by using a chip resistor.

For one-cell

1) Range and accuracy of detection / release voltage
●Overcharge detection voltage 3.6V to 5.0V, 5mV steps Accuracy±20mV
●Overdischarge detection voltage 2.0V to 3.0V, 50mV steps Accuracy±35mV
●Discharging overcurrent detection voltage +20mV to +65mV, 1mV steps Accuracy±15%
+65mV to +300mV, 5mV steps Accuracy±10mV
●Charging overcurrent detection voltage -65mV to -20mV, 1mV steps Accuracy±15%
-300mV to -65mV, 5mV steps Accuracy±10mV
●Short detection voltage 0.4V/0.5V/0.6V Accuracy±150mV
0.9V Accuracy±300mV

2) Range of detection delay time
●Overcharge detection delay time Selection from 0.25s, 0.5s, 1.0s
●Overdischarge detection delay time Selection from 20ms, 24ms, 96ms, 125ms
●Discharging overcurrent detection delay time Selection from 8ms, 12ms, 16ms, 20ms, 48ms
●Charging overcurrent detection delay time Selection from 8ms, 12ms, 16ms, 20ms, 48ms
●Short detection delay time Selection from 250µs, 400µs

3) 0V battery charge function Selection from "Prohibition" or "Permission"

4) Low current consumption
●Normal mode Typ. 3.0µA, Max. 6.0µA
●Stand-by mode Max. 0.1µA (For "Charger connection release" the overdischarge release condition.)
Max. 0.6µA (For "Voltage release" the overdischarge release condition.)

• SSON-6J
• SON-6C