MM3090 Mitsumi Electronics, Corp., MM3090 Datasheet - Page 8

• Manufacturer Part Number: MM3090
• Description: Protection For Lithium-ion/lithium Polymer Batteries
• Manufacturer: Mitsumi Electronics, Corp.

MITSUMI
Application Circuit
ApplicAtion hints
R1 and C1 stabilize a supply voltage ripple. However, the detection voltage rises by the current of penetration
in IC of the voltage detection when R1 is enlarged, and the value of R1 is adjusted to 1kΩ or less. Moreover,
adjust the value of C1 to 0.01µF or more to do the stability operation, please.
R1 and R2 resistors are current limit resistance if a charger is connected reversibly or a highvoltage charger
that exceeds the absolute maximum rating is connected. R1 and R2 may cause a power consumption will be
over rating of power dissipation, therefore the R1+R2 should be more than 1kΩ. Moreover, if R2 is too
enlarged, the charger connection release cannot be occasionally done after the overdischarge is detected, so
adjust he value of R2 to 10kΩ or less, please.
C2 and C3 capacitors have effect that the system stability about voltage ripple or imported noise. After check
characteristics, decide that these capacitors should be inserted or not, where should be inserted, and
capacitance value, please.
0.1µF
C1
R1
330Ω
Protection for Lithium-Ion/Lithium Polymer Batteries (1 cell) MM3090/MM3190 Series
Overcharge
Overdischarge
V
V
DD
SS
VD1
VD2
Oscillator
DS
Discharging
overcurrent
overcurrent
Charging
VD3
VD4
Counter
D
circuit
circuit
Logic
Logic
Delay
OUT
0.1µF
C3
C
OUT
Level shift
Short
2.2kΩ
V-
R2
0.1µF
C2
-
+