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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)： | 9/16頁 |
| 文件大?。?/td> | 299K |
| 代理商： | LT1513-2 |
9
LT1513/LT1513-2
APPLICATIO
S I
FOR
ATIO
U
current Schottky diodes have relatively high leakage cur-
rents (5
μ
A to 500
μ
A) even at room temperature. The latest
very-low-forward devices have especially high leakage cur-
rents. It has been noted that surface mount versions of some
Schottky diodes have as much as ten times the leakage of
their through-hole counterparts. This may be because a low
forward voltage process is used to reduce power dissipation
in the surface mount package. In any case, check leakage
specifications carefully before making a final choice for the
switching diode. Be aware that diode manufacturers want
to specify a maximum leakage current that is ten times
higher than the typical leakage. It is very difficult to get them
to specify a low leakage current in high volume production.
This is an on going problem for all battery charger circuits
and most customers have to settle for a diode whose typical
leakage is adequate, but theoretically has a worst-case
condition of higher than desired battery drain.
W
U
U
Thermal Considerations
Care should be taken to ensure that worst-case conditions
do not cause excessive die temperatures. Typical thermal
resistance is 30
°
C/W for the R package but this number will
C1,C3,C5 AND R3
TIED DIRECTLY TO
GROUND PLANE
GROUND PLANE
LT1513 TAB AND GROUND
PIN SOLDERED TO
GROUND PLANE
V
BAT
+
C1
C1
D1
C5
R3
C3
2 WINDING
INDUCTOR
L1A
L1B
V
IN
C2
LT1513 F04
R5
+
+
Figure 4. LT1513 Suggested Partial Layout for Critical Thermal and Electrical Paths
vary depending on the mounting technique (copper area,
airflow, etc.).
Average supply current (including driver current) is:
V
I
V
IN
I
mA
4
IN
BAT
CHRG
=
+
)0 024
(
)(
)
Switch power dissipation is given by:
P
I
R
V
V
V
V
(
SW
CHRG
SW
BAT
)
IN
BAT
IN
=
+
(
) (
)(
)(
)
2
R
SW
= Output switch ON resistance
Total power dissipation of the die is equal to supply current
times supply voltage, plus switch power:
P
D(TOTAL)
= (I
IN
)(V
IN
) + P
SW
For V
IN
= 10V, V
BAT
= 8.2V, I
CHRG
= 1.2A, R
SW
= 0.3
,
I
IN
= 4mA + 24mA = 28mA
P
SW
= 0.64W
P
D
= (10)(0.028) + 0.64 = 0.92W
相關(guān)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(guān)代理商/技術(shù)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(guān)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(yīng)商設(shè)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(guān)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(yīng)商設(shè)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(yīng)商設(shè)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(yīng)商設(shè)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(yīng)商設(shè)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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