DataSheet8.cn


PDF ( 数据手册 , 数据表 ) UB2012

零件编号 UB2012
描述 ADVANCED LINEAR CHARGE MANAGEMENT IC
制造商 Unisonic Technologies
LOGO Unisonic Technologies LOGO 


1 Page

No Preview Available !

UB2012 数据手册, 描述, 功能
UNISONIC TECHNOLOGIES CO., LTD
UB2012
Preliminary
LINEAR INTEGRATED CIRCUIT
ADVANCED LINEAR CHARGE
MANAGEMENT IC FOR SINGLE
AND TWO-CELL LITHIUM-ION AND
LITHIUM-POLYMER
„ DESCRIPTION
UTC UB2012 is designed for portable electronics with lower cost. Its
advantages of high-accuracy voltage/current regulation, charging status
indication, temperature monitoring, and automatic charge-rate compensation.
In applications, the battery temperature is continuously under monitor
by using an external thermistor, if the temperature is over user-defined
threshold; UTC UB2012 inhibits charge for safety concern.
Generally, the UB2012 charges the battery in conditioning, constant voltage and constant current phases. If the
battery voltage is lower than the low-voltage threshold (VMIN), a low current is used for conditioning the battery. The
conditioning charge rate is around 10% of the regulation current and the heat dissipation in the external pass
element during the initial stage of the charge is minimized by the conditioning current. After the conditioning phase,
the UB2012 applies a constant current that be set by an external sense-resistor to the battery. The sense-resistor
can be on the battery without additional components. The constant current phase continues until the battery reaches
the charge-regulation voltage, then the constant voltage phase is beginning.
UTC UB2012 offers 4.1V, 4.2V, 8.4V and 8.4V fixed-voltage for single and dual cells. Charge stops when the
current tapers to the charge termination threshold (ITERM) and will recharge if the battery voltage falls below the VRCH.
The automatic charge-rate compensation feature reduces the charging time of batteries. For the internal
impedance of battery pack during charge, this advanced technique offers safe and dynamic compensation.
„ FEATURES
* Ideal for Single 4.1V,4.2 V and Dual-Cell 8.2,8.4 V Li-Ion or Li-Pol Packs
* 0.3V Dropout Voltage for Minimizing Heat Dissipation
* Better than ±1% Accuracy of Voltage Regulation With Preset Voltages
* Dynamic Compensation of Battery Pack’s Internal Impedance to short Charging Time
* Optional Cell-Temperature Monitoring
* Integrated Voltage and Current Regulation With Programmable Charge-Current
* Integrated Cell Conditioning for Reviving Deeply Discharged Cells and Minimizing Heat Dissipation During Initial
Charge Stage
* Charge Status Output for Single or Dual Led or Host Processor Interface
* Automatic Battery-Recharge Feature
* Charge Termination by Minimum Current
* Automatic Low-Power Sleep Mode When VCC is Removed
* EVMs Available for Quick Evaluation
„ ORDERING INFORMATION
Ordering Number
Package
UB2012xG-S08-R
SOP-8
Note: x: Output Voltage, refer to Marking Information.
Packing
Tape Reel
www.unisonic.com.tw
Copyright © 2010 Unisonic Technologies Co., Ltd
1 of 17
QW-R121-018.b
Free Datasheet http://www.Datasheet4U.com







UB2012 pdf, 数据表
UB2012
Preliminary
„ APPLICATION INFORMATION(Cont.)
LINEAR INTEGRATED CIRCUIT
QUALIFICATION AND PRECHARGE
When the battery is present and power is applied, the UTC UB2012 starts a charge-cycle. Charge qualification
is affected by battery temperature and voltage. If the battery temperature is out of the VTS1 to VTS2 range; the UB2012
will suspend charge. In addition, if the battery voltage is below the precharge threshold V(min), the UB2012 uses
precharge to condition the battery. The conditioning charge rate I(PRECHG) is set at approximately 10% of the
regulation current, and the conditioning current minimizes heat dissipation in the external pass-element during the
beginning of charge, refer to Figure 3.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
8 of 17
QW-R121-018 .b
Free Datasheet http://www.Datasheet4U.com







UB2012 equivalent, schematic
UB2012
Preliminary
LINEAR INTEGRATED CIRCUIT
„ APPLICATION INFORMATION(Cont.)
Automatic charge-rate compensation setup requires the following information:
* Total impedance of battery pack (Z(PACK))
* Maximum charging current (I(REG))
The voltage drop across the internal impedance of battery pack, V(Z), can then be calculated using the following
equation:
V(Z) = Z(PACK ) × I(REG)
(13)
The required compensation is then calculated using the following equations:
V(COMP)
=
V(Z)
G(COMP)
V(PACK ) = VO(REG) + (G(COMP) × V(COMP) )
(14)
Where V(COMP) is the voltage on COMP pin. This voltage is referenced to VCC in current sensing configuration.
V(PACK) is the voltage across the battery pack.
The values of R(COMP1) and R(COMP2) can be calculated using the following equation:
V(COMP)
V(SNS)
=
RCOMP2
RCOMP1 + RCOMP2
(15)
DC+
RCOMP2
BAT+
RSNS
RCOMP1
UTC
UB2012
SNS COMP
DC-
BAT
VCC
CC
VSS
TS STAT
Figure 11. Automatic Charge-Rate Compensation Circuits
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
16 of 17
QW-R121-018 .b
Free Datasheet http://www.Datasheet4U.com










页数 17 页
下载[ UB2012.PDF 数据手册 ]


分享链接

Link :

推荐数据表

零件编号描述制造商
UB2012ADVANCED LINEAR CHARGE MANAGEMENT ICUnisonic Technologies
Unisonic Technologies
UB2016ONE-CELL STANDALONE LINEAR LITHIUM BATTERY CHARGERUnisonic Technologies
Unisonic Technologies
UB2017ONE-CELL STANDALONE LINEAR LITHIUM BATTERY CHARGERUnisonic Technologies
Unisonic Technologies

零件编号描述制造商
STK15C88256-Kbit (32 K x 8) PowerStore nvSRAMCypress Semiconductor
Cypress Semiconductor
NJM4556DUAL HIGH CURRENT OPERATIONAL AMPLIFIERNew Japan Radio
New Japan Radio
EL1118-G5 PIN LONG CREEPAGE SOP PHOTOTRANSISTOR PHOTOCOUPLEREverlight
Everlight


DataSheet8.cn    |   2020   |  联系我们   |   搜索  |  Simemap