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參數資料
| 型號： | MM1294 |
| 廠商： | MITSUMI ELECTRIC |
| 英文描述： | Protection of Lithium Ion Batteries (four cells in series) |
| 中文描述： | 保護鋰離子電池（4個串聯(lián)電池） |
| 文件頁數： | 3/6頁 |
| 文件大?。?/td> | 169K |
| 代理商： | MM1294 |
MITSUMI
Protection of Lithium Ion Batteries (four cells in series) MM1294
Pin Description
Absolute Maximun Ratings
(Ta=25°C)
Pin no.
Pin name
Input/
output
Function
1
OV
Output
2
CS
Input
3
DCHG
Output
4
PF
Output
5
CDC
Input
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
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.
6
COL
Input
7
COV
Input
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.
Ground pin
Pin for input of V1 cell high-side voltage and V2 cell low-side voltage
N.C
Pin for input of V2 cell high-side voltage and V3 cell low-side voltage
N.C
Pin for input of V3 cell high-side voltage and V4 cell low-side voltage
N.C
Pin for input of V4 cell high-side voltage
Power supply input pin
The same potential as the V4 pin should be input
8
9
GND
V1
Input
Input
10
11
12
13
14
15
V2
Input
V3
Input
V4
Input
16
V
CC
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 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 signal output 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.
Item
Symbol
T
STG
T
OPR
VV4 max.
V
CC
max.
V
OV
max.
Pd
Ratings
-
40~+125
-
20~+70
24
24
24
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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