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參數資料
| 型號： | UB2012AG-S08-R |
| 廠商： | UNISONIC TECHNOLOGIES CO LTD |
| 元件分類： | 電源管理 |
| 英文描述： | POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | HALOGEN FREE, SOP-8 |
| 文件頁數： | 8/17頁 |
| 文件大小： | 315K |
| 代理商： | UB2012AG-S08-R |
UB2012
Preliminary
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
16 of 17
www.unisonic.com.tw
QW-R121-018 .b
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
=
V
(15)
UTC
UB2012
SNS
BAT
VCC
TS
STAT
VSS
CC
COMP
DC+
DC-
RSNS
RCOMP2
RCOMP1
BAT+
Figure 11. Automatic Charge-Rate Compensation Circuits
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