MM3746 Series
N channel high side FET drive by charge pump
Outline
MM3746 series are protection ICs with charger pump and drive
high side N channel FET for Lithium-ion and Lithium-polymer
secondary battery. This IC is most suitable for the intelligent
battery pack with which I communicate data between the battery
pack and the system.
And MM3746 series has a temperature detection by using a
NTC Thermistor, protects the battery pack and system from over
temperature.
Features
(Unless otherwise specified, Ta=25°C)
(1) Range and accuracy of detection/release voltage
Overcharge detection voltage............................ Vdet1 ................................. 4.2V to 4.6V, 5mV steps.............Accuracy±15mV
Overdischarge detection voltage....................... Vdet2 ................................. 2.0V to 3.0V, 50mV steps...........Accuracy±40mV
Discharging overcurrent detection voltage........ Vdet3 ................................. 10mV to 150mV, 1mV steps.........Accuracy±3.0mV *1
Charging overcurrent detection voltage ............ Vdet4 ................................. –150mV to –10mV, 1mV steps .....Accuracy±3.0mV *1
Short detection voltage...................................... Vshort ................................ 40mV to 300mV, 50mV steps....... Accuracy±5.0mV
0V battery charge inhibition battery voltage ...... Vst ..................................... ±1.3V fixed .................................. Accuracy±150mV
Temperature detection....................................... Tdet ................................... 55 to 85°C.................................... Accuracy±5.0°C
*1 Accuracy of overcurrent detection voltage (Ta=25°C)
6
ꢀꢁet3ꢂ ꢀꢁet4
5
4
3
2
1
0
0
10
20
30
40
50
60
70
80
90 100
Overcurrent detection voltage ꢀmVꢁ
(2) Temperature detection function.............................Selectable “Enable” or “Disable”
(3) 0V battery charge function ....................................Selection from “Permission” or “Inhibition”
(4) Current consumption (Not include NTC bias current)
Normal mode .....................................................Typ. 6.0µA, Max. 10.0µA
Stand-by mode..................................................Max. 0.1µA (Overdischarge latch function Enable)
Max. 1.2µA (Overdischarge latch function Disable)
Pin assignment
WLCSP-10A
Pin no.
A1
Symbol
VSS
Function
Negative power supply voltage input terminal
Positive power supply voltage input terminal
Charge FET control terminal
(Top view)
A2
VDD
A3
COUT
*: +6<;
B1
B3
TH(TEST) Temperature level detect terminal (Test terminal)
*6<;
=++
(ꢄ
(ꢃ
(ꢂ
)ꢄ
*ꢄ
+ꢄ =ꢅ
+ꢃ
+ꢂ
=6<;
*7
CS
CN
Current level detect terminal
)ꢂ
*ꢂ
=::
C1
Flying capacitor connecting terminal
Discharge FET control terminal
Flying capacitor connecting terminal
Charge pump output terminal
;/
ꢀ;,:;ꢁ
*5
C3
DOUT
CP
D1
D2
VOUT
V+
D3
Charger positive voltage input terminal
1