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參數(shù)資料
| 型號(hào)： | Si9730ABY-T1-E3 |
| 廠商： | Vishay Intertechnology,Inc. |
| 英文描述： | Dual-Cell Lithium Ion Battery Control IC |
| 中文描述： | 雙鋰離子電池控制IC |
| 文件頁(yè)數(shù)： | 10/14頁(yè) |
| 文件大小： | 116K |
| 代理商： | SI9730ABY-T1-E3 |
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Si9730
Vishay Siliconix
www.vishay.com
10
Document Number: 70658
S-40135—Rev. F, 16-Feb-04
APPLICATION CIRCUIT
V
DD
Cell Balancing
Network
A/D
Converter
OUT
Oscillator
V
C
1.2 VREF
V
SS
Undervoltage
Lockout
Control
Logic
Timer
C
DELAY
Time Out
CLK
DCO
I
S
V
SS
V
M
S
OUT
I
LIMIT
C
D
FIGURE 8.
Typical 2 -Cell Circuit
Comparator
Cell 1
V
C1
Cell 2
V
C2
Current
Sense
14 M
Filter
Si9936DY
C
0.47 F
GS Gen.
C
V
M
100
100
100
R
IS
47 k
1
8
6
7
5
3
4
C
0.1 F
Load
Chgr.
8.4 V
1 A
Si9730
10 F
+
General Considerations
Figure 8 shows a typical application of the Si9730, controlling
a 2-cell lithium-ion battery (carbon or coke chemistry).
Specifics 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- resistor
in series with it. The purpose of the resistor is to ensure that in
the unlikely event of the IC shorting, the cells themselves will
not see a short. The maximum size of this resistance is set by
the current drain of the IC; for example, the V
DD
pin draws a
maximum of 60 A, which will drop V = 60 A * 100 = 6 mV
across the resistor. This drop constitutes 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
current 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
overcurrent, the amount of the delay being inversely
proportional to the amount of overcurrent, since the Is pin
senses a voltage. 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.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| Si9730BBY-T1 | Dual-Cell Lithium Ion Battery Control IC |
| Si9730BBY-T1-E3 | Dual-Cell Lithium Ion Battery Control IC |
| Si9730CBY-T1 | Dual-Cell Lithium Ion Battery Control IC |
| Si9730CBY-T1-E3 | Dual-Cell Lithium Ion Battery Control IC |
| Si9730DBY-T1 | Dual-Cell Lithium Ion Battery Control IC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SI9730BBY | 功能描述:電池管理 Battery Controller RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| SI9730BBY-E3 | 功能描述:電池管理 Li Batt Controller 4.20-4.30V OC Detect RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| SI9730BBY-T1 | 功能描述:電池管理 Li Batt Controller 4.20-4.30V OC Detect RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| SI9730BBY-T1-E3 | 功能描述:電池管理 Li Batt Controller 4.20-4.30V OC Detect RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| SI9730CBY | 功能描述:電池管理 Battery Controller RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
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