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參數(shù)資料
| 型號： | LT1513-2 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | SEPIC Constant- or Programmable-Current/ Constant-Voltage Battery Charger |
| 中文描述： | SEPIC拓撲的恒定或可編程電流/恒定電壓電池充電器 |
| 文件頁數(shù)： | 12/16頁 |
| 文件大小： | 299K |
| 代理商： | LT1513-2 |
12
LT1513/LT1513-2
APPLICATIO
S I
FOR
ATIO
U
The suggested way to control unity loop frequency is to
increase the filter time constant on the I
FB
pin (R4/C4 in
Figures 1 and 7). The filter resistor cannot be arbitrarily
increased because high values will affect charging current
accuracy. Charging current will increase by 1% for each
40
increase in R4. There is no inherent limitation on the
value of C4, but if this capacitor is ceramic, it should be an
X7R type to maintain its value over temperature. X7R
dielectric requires a larger footprint.
The formula for calculating the minimum value for the filter
capacitor C4 is:
W
U
U
C
R
(
V
R
( )(
π
V
V
IN
IN
BAT
4
3 4
2
12 1500
)(
)(
5
4
=
+
)(
)
)
μ
V
IN
= Highest input voltage
1500
μ
= Transconductance of error amplifier
(EA)f = Desired unity-gain frequency
V
BAT
= Battery voltage
For example, assume V
IN(MAX)
= 15V, R3 = 0.4
(charging
current set to 0.25A), R4 = 24
, R5 = 330
and V
BAT
= 8V,
C
F
4
0 4 4 15 12 0 0015 330
6.3(25000)(39)(
15 8
1
=
=
)
)
μ
The value for C4 could be reduced to a more manageable size
by increasing R4 to 75
and reducing R5 to 300
, yielding
0.47
μ
F for C4. The 2% increase in charging current can be
ignored or factored into the value for R3.
More Help
Linear Technology Field Application Engineers have a CAD
spreadsheet program for detailed calculations of circuit
operating conditions. In addition, our Applications Depart-
ment is always ready to lend a helping hand. The LT1371
data sheet may also be helpful. The LT1513 is identical
except for the current amplifier circuitry.
相關PDF資料 |
PDF描述 |
|---|---|
| LT1513CR-2 | SEPIC Constant- or Programmable-Current/ Constant-Voltage Battery Charger |
| LT1513IR-2 | SEPIC Constant- or Programmable-Current/ Constant-Voltage Battery Charger |
| LT1513C | SEPIC Constant- or Programmable-Current/ Constant-Voltage Battery Charger |
| LT1513CR | SEPIC Constant- or Programmable-Current/ Constant-Voltage Battery Charger |
| LT1513I | SEPIC Constant- or Programmable-Current/ Constant-Voltage Battery Charger |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LT1513-2CR | 功能描述:IC BATT CHRGR CONST/PROG I/V 7DD RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 其它有關文件:STC3100 View All Specifications 特色產(chǎn)品:STC3100 - Battery Monitor IC 標準包裝:4,000 系列:- 功能:燃料，電量檢測計/監(jiān)控器 電池化學:鋰離子（Li-Ion） 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應商設備封裝:8-MiniSO 包裝:帶卷 (TR) 其它名稱:497-10526-2 |
| LT1513-2CR#PBF | 功能描述:IC BATT CHRGR CONST/PROG I/V 7DD RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 其它有關文件:STC3100 View All Specifications 特色產(chǎn)品:STC3100 - Battery Monitor IC 標準包裝:4,000 系列:- 功能:燃料，電量檢測計/監(jiān)控器 電池化學:鋰離子（Li-Ion） 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應商設備封裝:8-MiniSO 包裝:帶卷 (TR) 其它名稱:497-10526-2 |
| LT1513-2CR#TR | 功能描述:IC CHARGER BATTERY FIXED V/I 7DD RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學:堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應商設備封裝:SOT-6 包裝:帶卷 (TR) |
| LT1513-2CR#TRPBF | 功能描述:IC BATT CHRGR CONST/PROG I/V 7DD RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學:堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應商設備封裝:SOT-6 包裝:帶卷 (TR) |
| LT1513-2CT7 | 功能描述:IC BATT CHG CNST/PROG I/V TO2207 RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標準包裝:1 系列:- 功能:充電管理 電池化學:鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:3.75 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應商設備封裝:SOT-23-5 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:669 (CN2011-ZH PDF) 其它名稱:MCP73831T-2ACI/OTCT |
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