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參數(shù)資料
| 型號(hào)： | MM1293 |
| 廠商： | MITSUMI ELECTRIC |
| 英文描述： | Protection of Lithium Ion Batteries (three cells in series) |
| 中文描述： | 保護(hù)鋰離子電池（3個(gè)串聯(lián)電池） |
| 文件頁數(shù)： | 3/6頁 |
| 文件大?。?/td> | 165K |
| 代理商： | MM1293 |
MITSUMI
Protection of Lithium Ion Batteries (three cells in series) MM1293
Pin Assignment
Pin no.
Pin name
Input/output
Function
1
OV
Output
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 V
CC
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, V
CC
: 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.
Ground pin
2
CS
Input
3
DCHG
Output
4
PF
Output
5
CDC
Input
6
COL
Input
7
COV
Input
8
MSW
Input
9
GND
ML
BATL
MM
BATM
MH
BATH
Input
Output
Input
Output
Input
Output
Input
10
Monitor output pin for the L cell voltage
11
Pin for input of L cell high-side voltage and M cell low-side voltage
12
Monitor output pin for the M cell voltage
13
Pin for input of M cell high-side voltage and H cell low-side voltage
14
Monitor output pin for the H cell voltage
15
Pin for input of H cell high-side voltage
16
V
CC
Input
Power supply input pin
The same potential as the BATH pin should be input
Absolute Maximun Ratings
(Ta=25°C)
Item
Symbol
T
STG
T
OPR
V
BAT
max.
V
CC
max.
V
OV
max.
Pd
Ratings
-
40~+125
-
20~+70
18
18
18
300
Units
°C
°C
V
V
V
mW
Storage temperature
Operating temperature
Charge voltage
Power supply voltage
Voltage applied to OV pin
Allowable loss
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