MITSUMI

Protection of Lithium Ion Batteries MM1414

Pin Description

Pin No. Pin name

I/O

Functions

Overcharge detection output pin

1

OV

Output

NPNTr open collector output

Normal: high impedance

Overcharge: Low

2

N.C

Not connected

Overcurrent detection pin

3

CS

Input

Monitors load current equivalently by the voltage drop between discharge control

FET source and drain, and makes DCHG pin high when the voltage goes below

overcurrent detection voltage, turning off discharge control FET. After

overcurrent detection, current flows from this pin and when there is a light load,

overcurrent mode is released. This function does not operate in discharge mode.

4

N.C

Not connected

Discharge control FET (P-ch) drive pin

5

DCHG

Output

Normal: Low

Overdischarge: High

6

N.C

Not connected

7

CDC

Input

Overdischarge detection dead time setting pin

Dead time can be set by connecting a capacitor between CDC pin and ground.

8

COL

Input

Overcurrent detection dead time setting pin

Dead time can be set by connecting a capacitor between COL pin and ground.

9

COV

Input

Overcharge detection dead time setting pin

Dead time can be set by connecting a capacitor between COV pin and ground.

10

GND

Input

Ground pin

11

SEL

Input

3 cell switch pin

SEL pin = GND: 3 cell (no V1 cell detection)

12

N.C

Not connected

Discharge FET ON/OFF pin

13

CON

Input

CON pin low; DCHG pin low

CON pin high; DCHG pin high

14

N.C

Not connected

15

V1

Input

V1 cell high side voltage input pin

16

V2

Input

V2 cell high side voltage and V3 cell low side voltage input pin

17

V3

Input

V3 cell high side voltage and V4 cell low side voltage input pin

18

V4

Input

V4 cell high side voltage input pin

19

N.C

Not connected

20

Input

Power supply input pin