參數(shù)資料
型號(hào)： 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(yè)數(shù)： 10/13頁(yè)
文件大?。?/td> 355K
代理商： SI9730
Si9730
Vishay Siliconix
S-60752—Rev. D, 05-Apr-99
10
FaxBack 408-970-5600, request 70658
www.siliconix.com
APPLICATION NOTES
FIGURE 8.
Typical 2-Cell Circuit
General Considerations
Figure 8 shows a typical application of the Si9730, controlling
a 2-cell lithium-ion battery. 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 μA, which will drop V =
60 μA 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.
Output Capacitor
Depending on the MOSFET selected, the Si9730 can open
the switch quite rapidly, in a matter of a few microseconds.
However, the various monitoring operations take 10-100 times
longer than this, and the basic period of the Si9730’s oscillator
is 4 msec. In order to prevent false readings by the Si9730, it
is necessary to attach a capacitor across the output of the
相關(guān)PDF資料
PDF描述
SI9731DB UP Controlled Battery Charger For 1-Cell Li-ion or 1-Cell to 3-Cell NiCd/NiMH Batteries
SI9731DQ UP Controlled Battery Charger For 1-Cell Li-ion or 1-Cell to 3-Cell NiCd/NiMH Batteries
SI9731 渭P Controlled Li-ion Battery Charger Pulse Charges 1 to 3 Cells Integrated MOSFETs
Si9731 μP Controlled Battery Charger For 1-Cell Li-ion or 1-Cell to 3-Cell NiCd/NiMH Batteries(用于1節(jié)鋰電池或1-3節(jié)鎳氫/鎳鎘電池的μP控制的電池充電器)
Si9750 In-Rush Current Limit MOSFET Driver(輸入電壓工作范圍2.9-13V，限流MOSFET驅(qū)動(dòng)器)
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(lèi)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(lèi)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(lèi)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(lèi)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(lèi)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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