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UB291G-XX-AG6-R Datasheet(HTML) 9 Page - Unisonic Technologies

Part No. UB291G-XX-AG6-R
Description  Charger Detection Voltage
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Maker  UTC [Unisonic Technologies]
Homepage  http://www.utc-ic.com
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UB291G-XX-AG6-R Datasheet(HTML) 9 Page - Unisonic Technologies

  UB291G-XX-AG6-R Datasheet HTML 9Page - Unisonic Technologies  
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UB291
Preliminary
CMOS IC
UNISONICTECHNOLOGIESCO.,LTD
9 of 9
www.unisonic.com.tw
QW-R128-002.b
TYPICAL APPLICATION CIRCUIT
M1
M2
R1=100~470Ω
C1=0.1µF
R2=2.2kΩ
DO
CO
VDD
VSS
VM
Battery
EB+
EB-
UTC UB291
DS
Notes: 1. R1 and C1 stabilize a supply voltage ripple. However, the detection voltage rises by the current of
penetration in IC of the voltage detection when R1 is enlarged, and the value of R1 is adjusted to 1kohm
or less. Moreover, adjust the value of C1 to 0.01uF or more to do the stability operation, please.
2. R1 and R2 resistors are current limit resistance if a charger is connected reversibly or a high voltage
charger that exceeds the absolute maximum rating is connected. R1 and R2 may cause a power
consumption will be over rating of power dissipation, therefore the ’R1+R2’ should be more than 1kohm.
Moreover, if R2 is too enlarged, the charger connection release cannot be occasionally done after the
overdischarge is detected, so adjust the value of R2 to 10kohm or less, please.
3. C2 and C3 capacitors have effect that the system stability about voltage ripple or imported noise. After
check characteristics, decide that these capacitors should be inserted or not, where should be inserted,
and capacitance value, please.
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.


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