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参数资料
| 型号： | SI9730ABY-T1-E3 |
| 厂商： | Vishay Siliconix |
| 文件页数： | 10/15页 |
| 文件大小： | 0K |
| 描述： | IC CONTROLLR LI-ION 4.2V 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) |
Si9730
Product is End of Life 3/2014
Vishay Siliconix
APPLICATION CIRCUIT
+
Si9730
C
10 μF
100 Ω
V DD
3
4
C D
Cell 1
V C1
C 1
0.1 μF
Cell Balancing
Network
Undervoltage
Lockout
Timer
100 Ω
V C
5
A/D
Converter
OUT
Control
Logic
C DELAY
Time Out
CLK
Load
Cell 2
Chgr.
V C2
Oscillator
8.4 V
Current
Sense
14 M Ω
100 Ω
C 2
0.47 μF
Filter
V SS
7
1.2 VREF
Comparator
I LIMIT
S OUT
V SS
GS Gen.
V M
1A
I S
6
R IS
47 k Ω
8
1
V M
DCO
Si9936DY
Figure 8. Typical 2 -Cell Circuit
GENERAL CONSIDERATIONS
Figure 8 shows a typical application of the Si9730, controlling
a 2-cell lithium-ion battery (carbon or coke chemistry). Spe-
cifics of the selection of MOSFETs, current sensing resistor,
and output capacitor are detailed below. In addition, there
are several typical features of this circuit to be observed.
First, each connection from a cell to the IC has a 100 Ω resis-
tor in series with it. The purpose of the resistor is to ensure
that in the unlikely event of the IC shorting, the cells them-
selves will not see a short. The maximum size of this resis-
tance is set by the current drain of the IC; for example, the
V DD pin draws a maximum of 60 μA, which will drop
V = 60 μA * 100 Ω = 6 mV across the resistor. This drop con-
www.vishay.com
10
stitutes an error in the measured cell voltage, and so the
resistor must be small enough that the error voltage is
acceptable.
A second typical feature demonstrated in Figure 8 is the cur-
rent sense filter formed by RIS and C2. This provides a noise
filter, to prevent the Si9730 from opening the connection to
the battery if there is noise on its current sense pin. It also
causes a delay in the response of the IC to a genuine over-
current, the amount of the delay being inversely proportional
to the amount of overcurrent, since the Is pin senses a volt-
age. Increasing this filter’s time constant could be used to
allow short-time surges of current out of the battery without
compromising its ability to protect the battery.
Document Number: 70658
S-40135-Rev. F, 16-Feb-04
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SI9730BBY | 功能描述:电池管理 Battery Controller RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| SI9730BBY-E3 | 功能描述:电池管理 Li Batt Controller 4.20-4.30V OC Detect RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| SI9730BBY-T1 | 功能描述:电池管理 Li Batt Controller 4.20-4.30V OC Detect RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| SI9730BBY-T1-E3 | 功能描述:电池管理 Li Batt Controller 4.20-4.30V OC Detect RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| SI9730CBY | 功能描述:电池管理 Battery Controller RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
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