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參數(shù)資料
| 型號(hào)： | LM3641 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Lithium-Ion Battery Pack Protection Circuit |
| 中文描述： | 鋰離子電池保護(hù)電路 |
| 文件頁(yè)數(shù)： | 9/17頁(yè) |
| 文件大?。?/td> | 327K |
| 代理商： | LM3641 |
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Product Description
(Continued)
Fail Safe Features
The safety provided by the LM3641 goes beyond the normal
operation of the IC. The design of the IC includes many as-
pects that continue to assure protection of the cells even
when malfunctions occur.
A rugged internal sense resistor offers precise overcur-
rent response (magnitude and time) which allows smaller
volume power MOSFETs to be used. If the internal resis-
tor’s sense circuitry’s input open circuit (very unlikely),
the MOSFET pair will turn OFF. The IC will fail safe.
If any pin becomes detached from the PCB, either the
MOSFETs will turn OFF or the part will continue to protect
the Cell.
The maximum cell voltage limit is trimmed by EEPROM
and offers optimal accuracy. Each EEPROM cell has re-
dundant EEPROM transistors for additional reliability.
The EEPROM register also contains a parity check bit. In
the rare event that an EEPROM bit would change state,
the power MOSFETs will be turned OFF rather than allow
the IC to operate out of specification.
The external MOSFETs are specified to provide ad-
equate illegal charger withstand capability. Because of
M3, the IC is designed to never be exposed to more than
the actual cell voltage. Therefore the IC’s maximum rated
supply voltage does not limit the magnitude of illegal
charger voltages that can be protected by the IC. M3’s Vt
also guarantees that shorted cells can not be charged.
DS012931-13
FIGURE 2. Normal Termination of Discharging
DS012931-14
FIGURE 3. Termination of Illegally High Charging
DS012931-15
FIGURE 4. Load Applied in Overcharged State
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3641M | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Lithium-Ion Battery Pack Protection Circuit |
| LM3642TLE/NOPB | 功能描述:LED顯示驅(qū)動(dòng)器 1.5A Sync Boost LED Flash Dvr RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube |
| LM3642TLE-LT/NOPB | 制造商:Texas Instruments 功能描述:IC LED FLASH DVR BOOST 9DSBGA 制造商:Texas Instruments 功能描述:LED Lighting Drivers 1.5A Sync Boost LED Flsh Drvr 制造商:Texas Instruments 功能描述:LIGHTING DISPLAY IC |
| LM3642TLX/NOPB | 功能描述:LED顯示驅(qū)動(dòng)器 1.5A Sync Boost LED Flash Dvr RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube |
| LM3642TLX-LT/NOPB | 制造商:Texas Instruments 功能描述:IC LED FLASH DVR BOOST 9DSBGA 制造商:Texas Instruments 功能描述:LED Lighting Drivers 1.5A Sync Boost LED Flsh Drvr 制造商:Texas Instruments 功能描述:LIGHTING DISPLAY IC |
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