9
MS Lithium-Ion Rechargeable Battery
<3V Type>
Standard Charging Circuit Settings List for Using MS Rechargeable Battery with Constant
Voltage and Constant Resistance.
Charging Voltage : 3.3V Max.
Charging current limiting resistance : R
D1 : Diode(Item of smaller VF, IR is recommendable)
D2 : Using a schottky type of smaller VF will lead
better performance
Circuit Example in the case of using 3V for Power Supply.
Circuit Example in the case of using 5V for Power Supply.
(1) with using voltage regulator IC
(3) with using charge/discharge control IC (4) with using devided resistance for valtage
(2) with using Zener diode
CHARGING CIRCUIT
Load
MS
CLOCK
CMOS
etc.
D2RD1
3.3V Max.
Power
Supply
Vc
MS412F
MS414
MS421S
MS614, 614F, 614S
MS621, 621F
MS920
MS920S
2.7 to 3.3
2.7 to 3.3
2.7 to 3.3
2.7 to 3.3
2.7 to 3.3
2.7 to 3.3
2.7 to 3.3
0.08max.
0.08max.
0.08max.
0.30max.
0.30max.
0.60max.
0.40max.
0.15
0.15
0.15
0.5
0.5
1.0
0.5
2
2
2
10
10
20
10
Type
Charging
Voltage
Range (V)
Recommendable
Charging
Current (mA)
At Battery Voltage
of 3.0V
Ic
At the Battery
Voltage of 3.0V
I
U
At the Battery
Voltage of 0V
I
L
Maximum Charging Current (mA)
As for the minimum limit resistance R,
please use the value which satisfies
the following two formula;
1)In the case a battery voltage is 3.0V:
R> (Vc-3.0-Vf) / I
U
2)In the case a battery voltage is 0V:
R> (Vc-Vf) / IL
Also for the recommendable limit
resistance, please use Ic instead of
I
U in the formula 1).
MS
D2
R
D1
3.0V to 3.5V
3.3V Max.
Load
MS614F
D2 Vf=0.1V
R
D1
3.3V
Vf=0.2V
3.1V
Load
3.0-2.0V
<3.0mAh>
Over 330Ω
MS
Load
D
R
IC
5V
3.3V Max.
D1
D2
D3
3.3V Max.
ZD
R
MS
5V
Load
IC
3.3V Max.
D
5V
MS
R
Load
D2D1
R1
R2
3.3V Max.
5V
MS
Load