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UB2012CL-S08-R Arkusz danych(PDF) 16 Page - Unisonic Technologies

Numer części UB2012CL-S08-R
Szczegółowy opis  ADVANCED LINEAR CHARGE MANAGEMENT IC
PDF  17 Pages
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Producent  UTC [Unisonic Technologies]
Strona internetowa  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

UB2012CL-S08-R Arkusz danych(HTML) 16 Page - Unisonic Technologies

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UB2012
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
16 of 17
www.unisonic.com.tw
QW-R121-018 .G
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:
)
REG
(
)
PACK
(
)
Z
(
I
×
Z
=
V
(13)
The required compensation is then calculated using the following equations:
)
COMP
(
)
Z
(
)
COMP
(
G
V
=
V
(14)
)
V
×
G
(
+
V
=
V
)
COMP
(
)
COMP
(
)
REG
(
O
)
PACK
(
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:
2
COMP
1
COMP
2
COMP
)
SNS
(
)
COMP
(
R
+
R
R
=
V
V
(15)
UTC
UB2012
SNS
BAT
VCC
TS
STAT
VSS
CC
COMP
DC+
DC-
RSNS
RCOMP2
RCOMP1
BAT+
Fig. 11 Automatic Charge-Rate Compensation Circuits



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