MM1293 查看數據表（PDF） - Mitsumi

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产品描述 (功能)

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MM1293

Protection of Lithium Ion Batteries (three cells in series)

Mitsumi 

MITSUMI

Protection of Lithium Ion Batteries (three cells in series) MM1293

Pin Assignment

Pin no.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

Pin name

OV

CS

DCHG

PF

CDC

COL

COV

MSW

GND

Input/output

Function

Output

Input

Output

Output

Input

Input

Input

Input

Overcharge detection output pin

NPN transistor open collector output; normally high impedance, goes to L

level on overdischarge

Overcurrent detection pin

Monitors equivalent load current through source-drain voltage drop of discharge-controlling

FET, and at or above the overcurrent detection voltage sets the DCHG pin to "H" and turns

off the discharge-controlling FET. Following overcurrent detection, current is passed from

this pin, and if the load is decreased, the overcurrent mode is canceled. Through this action

there is a temporary consumption current (at the VCC pin) of approx. 1 mA on resumption of

discharge and detection of overdischarge. This function is disabled in overdischarge mode.

Pin driving the discharge-controlling FET (P-ch)

Normally "L"; on overdischarge set to "H"

Output pin for overdischarge detection signals

Overdischarge detection pin

When the overdischarge detector detects overdischarge at the open collector output of

the NPN transistor, this pin is turned on. A delay is provided by setting a dead time until

discharge ends, so that by utilizing a reset or other signal from a CPU or some other

controlling device, the equipment can be put into standby mode.

Pin to set the dead time for overdischarge detection

By connecting a capacitor between the CDC pin and GND, a dead time can be set.

Pin to set the dead time for overcurrent detection

Pin to set the dead time for overcurrent detection

By connecting a capacitor between the COL pin and GND, a dead time can be

set. If NC, protection is triggered in a short amount of time; the dead time

should be set according to the application.

Pin to set the dead time for overcharge detection

By connecting a capacitor between the COV pin and GND, a dead time can be

set.

Pin to switch the cell voltage monitor on/off

GND: monitor on, VCC: monitor off

The cell voltage monitor converts the different cell voltages to a GND-

reference voltage and outputs it from the ML, MM and MH pins.

Input Ground pin

ML

Output Monitor output pin for the L cell voltage

BATL

Input Pin for input of L cell high-side voltage and M cell low-side voltage

MM

Output Monitor output pin for the M cell voltage

BATM

Input Pin for input of M cell high-side voltage and H cell low-side voltage

MH

Output Monitor output pin for the H cell voltage

BATH

Input Pin for input of H cell high-side voltage

VCC

Input

Power supply input pin

The same potential as the BATH pin should be input

Absolute Maximun Ratings (Ta=25°C)

Item

Storage temperature

Operating temperature

Charge voltage

Power supply voltage

Voltage applied to OV pin

Allowable loss

Symbol

TSTG

TOPR

VBAT max.

VCC max.

VOV max.

Pd

Ratings

-40~+125

-20~+70

18

18

18

300

Units

°C

°C

V

V

V

mW

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