MITSUMI

Protection of Lithium Ion Batteries (two cells in series) MM1292

Block Diagram

Note 1. 45µA max. (current consumption during operation of overcharge detection section) flows to input

protection resistor R1.

Note 2. 0.3µA max. (when cells are balanced) flows to input protection resistor R2. When the cells are not

balanced, the current increases to wards correction.

Data intake

prohibition interval

Data intake prohibition interval

t2

t1

tOP

tST

Operating

interval

waiting interval

tOP

tST

Time

Average

current

30

µA

5

µA

Current

consumption

Timing for setting non-induction time

Data processing

section

Non-induction

time

Overcharging

identification

Reset

VH

GC

VCS (battery-)