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參數(shù)資料
| 型號： | UCC3911 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Lithium-Ion And Lithium-Polymer Battery Protector(2節(jié)鋰電池保護) |
| 中文描述： | 鋰離子電池和鋰聚合物電池保護（2節(jié)鋰電池保護） |
| 文件頁數(shù)： | 1/10頁 |
| 文件大?。?/td> | 166K |
| 代理商： | UCC3911 |
SLUS429B– FEBRUARY 2000 – REVISED NOVEMBER 2002
1
www.ti.com
FEATURES
Protects Sensitive Lithium-Ion and
Lithium-Polymer Cells from Overcharging
and Overdischarging
Used for Two-Cell Battery Packs
No External FETs Required
Provides Protection Against Battery Pack
Output Short Circuit
Extremely Low Power Drain on Batteries of
About 20
μ
A
Low Internal FET Switch Voltage Drop
User Controllable Delay for Tripping Short
Circuit Current Protector
3-A Current Capacity
APPLICATIONS
PDA, Camcorder, Digital Camera, Private
Mobile Radio
SIMPLIFIED APPLICATION DIAGRAM
DESCRIPTION
The UCC3911 is a two-cell lithium-ion (Li-Ion) and
lithium-polymer (Li-Pol) battery pack protector
device that incorporates an on-chip series FET
switch thus reducing manufacturing costs and
increasing reliability. The device’s primary
function is to protect both Li-Ion and Li-Pol cells in
a two-cell battery pack from being either
overcharged (overvoltage) or overdischarged
(undervoltage). It employs a precision bandgap
voltage reference that is used to detect when
either cell is approaching an overvoltage or
undervoltage state. When on-board logic detects
either condition, the series FET switch opens to
protect the cells.
A negative feedback loop controls the FET switch
when the battery pack is in either the overvoltage
or undervoltage state. In the overvoltage state the
action of the feedback loop is to allow only
discharge current to pass through the FET switch.
In the undervoltage state, only charging current is
allowed to flow. The operational amplifier that
drives the loop is powered only when in one of
these two states. In the undervoltage state the
chip enters sleep mode until it senses that the
pack is being charged.
The FET switch is driven by a charge pump when
the battery pack is in a normally charged state to
achieve the lowest possible R
DS(on)
. In this state
the negative feedback loop’s operational amplifier
is powered down to conserve battery power. Short
circuit protection for the battery pack is provided
and has a nominal delay of 100
μ
s before tripping.
An external capacitor may be connected between
CDLY and B0 to increase this delay time to allow
longer overcurrent transients.
A chip enable (CE) pin is provided that when held
low, inhibits normal operation of the device to
facilitate assembly of the battery pack.
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Copyright
2000–2003, Texas Instruments Incorporated
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NC
SUBS
SUBS
GND
LPWARN
GND
B2
CDLY
B1
SUBS
SUBS
B0
CE
B0
UCC3911
+
+
ISOLATED
COPPER
PAD
ISOLATED
COPPER
PAD
OV
UV
UDG–01075
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UCC3911DP-1 | 功能描述:電池管理 2-Cell Lithium-Ion Protection IC 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 |
| UCC3911DP-1G4 | 功能描述:電池管理 2-Cell Lithium-Ion Batt Protection IC 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 |
| UCC3911DP-2 | 功能描述:電池管理 2-Cell Lithium-Ion Protection IC 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 |
| UCC3911DP-2G4 | 功能描述:電池管理 2-Cell Lithium-Ion Protection IC 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 |
| UCC3911DP-3 | 功能描述:電池管理 2-Cell Lithium-Ion Protection IC 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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