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PDF UB2421 Data sheet ( Hoja de datos )
| Número de pieza | UB2421 | |
| Descripción | ONE CELL LITHIUM-ION / POLYMER BATTERY PROTECTION IC | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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UNISONIC TECHNOLOGIES CO., LTD
UB2421
Preliminary
ONE CELL LITHIUM-ION /
POLYMER BATTERY
PROTECTION IC
DESCRIPTION
UTC UB2421 is a lithium-ion / lithium-polymer rechargeable
battery protection IC incorporating high accuracy voltage detection
circuits and delay circuits.
It is suitable for protection of single cell lithium-ion / lithium
polymer battery packs from overcharge, over discharge and over
current.
The tiny package required external few components make the
UTC UB2421 be able to be applied to space limited battery pack.
FEATURES
* Wide supply voltage range: VDD=1.8V~9.0V
* Ultra-low quiescent Current: IDD=3.0μA (VDD=3.9V)
* Ultra-low power-down Current: IPD=0.1μA (VDD=2.0V)
* Overcharge detection voltage: VOCU=4.30V±0.05V
* Overcharge release voltage: VOCR=4.10V±0.05V
* Overdischarge release voltage: VODL=2.40V±0.10V
* Overdischarge release voltage: VODR=3.00V±0.10V
* Over current detection voltage: VOI1=0.15V±0.03V
* Short circuit detection voltage: VOI2=1.35V (Fixed)
* Charger detection voltage: VCH=-0.7V
* Delay times are generated by an internal circuit.
(External capacitors are unnecessary.)
ORDERING INFORMATION
Ordering Number
UB2421G-AG6-R
Package
SOT-26
Packing
Tape Reel
CMOS IC
MARKING
www.unisonic.com.tw
Copyright © 2012 Unisonic Technologies Co., Ltd
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UB2421
Preliminary
TYPICAL APPLICATION CIRCUIT
CMOS IC
VBAT+
Battery
R1=100Ω
VDD
C1=0.1µF
UB2421
DS
VSS
OD
CSI
OC
M1 M2
R2=1kΩ
VBAT-
www.unisonic.com.tw
Copyright © 2012 Unisonic Technologies Co., Ltd
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UB2421
Preliminary
TIMING DIAGRAM(Cont.)
4. Over Current and Short Circuit Condition → Normal Condition
Charger
Load
VOCU
VOCR
VODR
VODL
VDD
CSI
VDD
VSS
VDD
VOI2
VOI1
VSS
TOI1
TOI2
CMOS IC
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
www.unisonic.com.tw
Copyright © 2012 Unisonic Technologies Co., Ltd
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| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet UB2421.PDF ] | |
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