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參數(shù)資料
| 型號： | Si9730 |
| 廠商： | Vishay Intertechnology,Inc. |
| 英文描述： | Dual-Cell Lithium Ion Battery Control IC(兩節(jié)鋰電池充電控制芯片) |
| 中文描述： | 雙鋰離子電池控制IC（兩節(jié)鋰電池充電控制芯片） |
| 文件頁數(shù)： | 13/13頁 |
| 文件大?。?/td> | 355K |
| 代理商： | SI9730 |
Si9730
Vishay Siliconix
FaxBack 408-970-5600, request 70658
www.siliconix.com
S-60752—Rev. D, 05-Apr-99
13
necessary only if the charger voltage is higher than the 15-V
absolute maximum of the IC plus two cells’ voltage drop. Just
as with the capacitor, if one switch is open and the other
closed, the IC will see this charger voltage, and must be
protected. The power rating of the zener can be inferred by
observing that the current through it is limited by the 100-
resistor. A tradeoff can be made here between the power
rating of the zener, which can be decreased by increasing the
resistor value, and the accuracy of the voltage measurement
by the Si9730, which can be increased by decreasing the
resistor value.
FIGURE 10.
Factory Startup Circuit
Reset from Shutdown
There are two specialized conditions that can place the
Si9730 in shutdown mode. The first condition can occur when
the circuit is first attached to a battery in the factory. When the
IC comes up, it will be in the undervoltage shutdown mode.
The Si9730 may also enter this mode when the ambient
temperature drops and the battery is nearly in UV. When the
temperature drops, the battery pack voltage will drop and the
IC may enter the shutdown mode. In either case, the Si9730
must be reset by raising the V
SS
pin higher than the V
M
pin by
V
CPHD
. Figure 10 shows a circuit that resets the circuit once it
has entered the shutdown mode.
The circuit works by initially connecting the 0.1-μF capacitor to
the battery’s center tap and placing the switch in position #1.
Although the MOSFETs are open, the 1-m
resistor is
sufficient to allow the capacitor to charge up in about 300-
400 msec. Once the capacitor is charged, the switch is placed
in position #2, momentarily making V
SS
higher than V
M
, thus
placing the Si9730 in the normal operating mode. The entire
circuit provides a leakage of only a few microamps, which is
much lower than the self discharge current of the LiIon
battery.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SI9730ABY | 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 |
| SI9730ABY-E3 | 功能描述:電池管理 Li Batt Controller 4.15-4.25V 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 |
| SI9730ABY-T1 | 功能描述:電池管理 Li Batt Controller 4.15-4.25V 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 |
| SI9730ABY-T1-E3 | 功能描述:電池管理 Li Batt Controller 4.15-4.25V 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 | 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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