参数资料
型号: SI9730CBY-T1-E3
厂商: Vishay Siliconix
文件页数: 1/15页
文件大小: 0K
描述: IC CONTROLLR LI-ION 4.22V 8SOIC
标准包装: 2,500
功能: 双电池控制器
电池化学: 锂离子(Li-Ion)
工作温度: -25°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOICN
包装: 带卷 (TR)
Product is End of Life 3/2014
Si9730
Vishay Siliconix
Dual-Cell Lithium Ion Battery Control IC
DESCRIPTION
FEATURES
The Si9730 monitors the charging and discharging of dual-
cell lithium-ion battery packs (carbon or coke chemistry)
ensuring that battery capacity is fully utilized while ensuring
safe operation. The Si9730 provides protection against over-
charge, over-discharge, and short circuit conditions which
are hazardous to the battery and the environment.
Battery voltages of each individual cell are monitored at the
center-tap connection by an internal A/D converter through
the V C pin. If one or both of the cells is determined to be
overcharged, an internal cell balancing network "bleeds" off
current at 15 μA until both cells are charged to the same
maximum level. Depending on the condition of each cell, the
Si9730 will switch two external source-connected N-Channel
MOSFETs on or off to allow the cells to be charged or to pro-
vide current to the load.
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Over-Charge Protection
Over-Discharge Protection
Short Circuit Current Limiting
Battery Open-Circuit Center Tap Protection
Cell Voltage Balancing
Undervoltage Lockout
Individual Cell Voltage Monitoring
Low Operating Current (30 μA) and Shutdown Current
(1 μA)
Internal N-Channel MOSFET Driver
High Noise Immunity
Accurate (± 1.19 %) Over-Charge Voltage Detection
Four Different Cell Types Covered
The Si9730 is available in an 8-pin SOIC package with an
operating temperature range of - 25 to 85 °C. The Si9730 is
available in both standard and lead (Pb)-free packages.
FUNCTIONAL BLOCK DIAGRAM AND PIN CONFIGURATION
C
V DD
Undervoltage
+
V C1
?
Cell Balancing
Network
Lockout
Timer
C DELAY
V C
A/D
Converter
OUT
Control
Logic
Time Out
CLK
+
V C2
?
Oscillator
V SS
DCO
I S
Document Number: 70658
S-40135-Rev. F, 16-Feb-04
1.2 V REF
I LIMIT
S OUT
V SS
V M
GS Generator
V M
www.vishay.com
1
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