|
|
PDF BM3451 Data sheet ( Hoja de datos )
| Número de pieza | BM3451 | |
| Descripción | 3/4/5 Cell Battery Protectors | |
| Fabricantes | BYD Microelectronics | |
| Logotipo |  |
|
1. BM3451 datasheet pdf  Hay una vista previa y un enlace de descarga de BM3451 (archivo pdf) en la parte inferior de esta página. Total 28 Páginas | ||
|
No Preview Available !
BYD Microelectronics Co., Ltd.
BM3451 Series
3/4/5 Cell Battery Protectors
General Description
The BM3451 is a professional protection IC for 3/4/5 cells rechargeable battery pack; it is highly
integrated, and generally used in power tools, electric bicycles and UPS applications.
The BM3451 works constantly to monitor each cell’s voltage, the current of charge or discharge, and
the temperature of the environment to provide overcharge, over-discharge, discharge overcurrent, short
circuit, charge overcurrent and over-temperature protections, etc. Besides, it also can change the
protection delay time of overcharge, over-discharge and discharge overcurrent by setting the external
capacitors.
The BM3451 provides external bleeding for cell-capacity balance function to avoid unbalanced
capacity between each cell. Thus, the batteries can work for longer.
Extended function module embedded in the BM3451 ICs can make them work for more battery packs
with multiple chips, and they can protect 6-cell batteries or more than 6-cell batteries.
Features
(1) High-accuracy voltage detection for each cell
·overcharge threshold
3.6V~4.6V
·overcharge hysteresis
0.1V
accuracy: ±25 mV (+25℃)
accuracy: ±40 mV (-40℃ to +85℃)
accuracy: ±50 mV
·over-discharge threshold
·over-discharge hysteresis
1.6V~3.0V
accuracy: ±80 mV
0V / 0.2V / 0.4V accuracy: ±100 mV
(2) Three grades voltage detection of discharge overcurrent
·discharge overcurrent 1
0.025 V ~ 0.30 V (50 mV step)
·discharge overcurrent 2
0.2 V / 0.3V / 0.4V / 0.6 V
·short circuit
0.8V / 1.2 V
(3) Charge overcurrent detection
·detection voltage
-0.03V / -0.05V / -0.1V / -0.15V / -0.2 V
(4) 3/4/5 cell protection enable
(5) Setting of output delay time
·overcharge, over-discharge, discharge overcurrent 1 and discharge overcurrent 2 protection delay
time can be set by external capacitors
(6) Supports external bleeding for balance
(7) Controlling the state of charge or discharge by external signals
(8) The maximum output voltage of CO / DO: 12V
(9) Over-temperature protection
(10) Breaking wire protection
(11) Low power consumption
·operation mode（with Temp protection）
·operation mode（without Temp protection）
·sleeping mode
25 μA
15 μA
6 μA
typical
typical
typical
Datasheet
WI-D06-J-0036 Rev.A/1
1 / 28
1 page  
BYD Microelectronics Co., Ltd.
BM3451 Series
13 - BALDN Balance signal transfer terminal 2
14
12
VIN
Charge and Discharge overcurrent Voltage detection
terminal 2
15 - OCCT Discharge overcurrent release control terminal by load
16 13 SET Select terminal for 3/4/5 cell application
17 14 GND Ground pin of the IC, Cell1 negative input
18 - BAL1 Cell1 external bleeding control
19 15 VC1 Cell1 positive input, Cell2 negative input
20 - BAL2 Cell2 external bleeding control
21 16 VC2 Cell2 positive input, Cell3 negative input
22 - BAL3 Cell3 external bleeding control
23 17 VC3 Cell3 positive input, Cell4 negative input
24 - BAL4 Cell4 external bleeding control
25 18 VC4 Cell4 positive input, Cell5 negative input
26 - BAL5 Cell5 external bleeding control
27 19 VC5 Cell5 positive input
28 20 VCC Power supply,Cell5 positive input
Table 2
Absolute Maximum Ratings
Item
Symbol
Description
Ratings
Unit
Power supply voltage
Single cell input voltage
VM input voltage
VCC
VCELL
VM
-
Vcell5,Vcell4,Vcell3
Vcell2,Vcell1
VM
GND-0.3 ~ GND+30
GND-0.3 ~ GND+6
GND-20 ~ GND+30
V
V
V
DO output voltage
CO output voltage
Operating temperature
Storage temperature
VDO
VCO
TA
TSTG
DO
CO
-
-
Table 3
GND-0.3 ~ VCC+0.3
GND-20 ~ VCC+0.3
-40 ~ 85
-40 ~ 125
V
V
℃
℃
Caution: The absolute maximum ratings are rated values exceeding which the product could suffer
physical damage. These values must therefore not be exceeded in any conditions.
Datasheet
WI-D06-J-0036 Rev.A/1
5 /28
5 Page 
BYD Microelectronics Co., Ltd.
Operation Timing Charts
1. Overcharge/Over-discharge Protection
VCELL
VDET1
VREL1
VREL2
VDET2
BM3451 Series
VCC
12V
VCO
GND
VCHR-
VCC
12V
VDO
GND
VCHR-
VCC
VM
GND
VCHR-
Connecting to load
Connecting to charger
TDET1
(1) (2)
TDET2
(1) (3)
(1)
Figure 4
Assuming the charging current is constant, VCHR- is the voltage of the charger’s negative terminal:
（1）Normal condition;
（2）Overcharge protection state;
（3）Over-discharge protection state.
Datasheet
WI-D06-J-0036 Rev.A/1
11 /28
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet BM3451.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| BM3451 | 3/4/5 Cell Battery Protectors | BYD Microelectronics |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |