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參數(shù)資料
| 型號： | LTC4000IUFD#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQCC28 |
| 封裝： | 4 X 5 MM, LEAD FREE, PLASTIC, MO-220WXXX-X, QFN-28 |
| 文件頁數(shù)： | 20/40頁 |
| 文件大?。?/td> | 428K |
| 代理商： | LTC4000IUFD#PBF |
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LTC4000
27
4000f
applicaTions inForMaTion
DESIGN EXAMPLE
In this design example, the LTC4000 is paired with the
LT3845 buck converter to create a 10A, 3-cell LiFePO4
battery charger. The circuit is shown on the front page
and is repeated here in Figure 14.
The input voltage monitor falling threshold is set at
14.3V according to the following formula:
RVM1 =
14.3V
1.193V
1
100kΩ ≈ 1.10MΩ
The IL pin is left open such that the voltage on this pin
is >1.05V. The regulation voltage on the IIMON pin is
clamped at 1.0V with an accurate internal reference.
Therefore, the input current limit is set at 10A according
to the following formula:
RIS =
0.050V
10A
= 5mΩ
RCL is set at 24.9kΩ such that the voltage at the CL pin
is 1.25V. Similar to the IIMON pin, the regulation voltage
on the IBMON pin is clamped at 1V with an accurate
internal reference. Therefore, the charge current limit
is set at 10A according to the following formula:
ICLIM(MAX) =
0.050V
RCS
=
0.050V
5mΩ
= 10A
The trickle charge current level is consequently set at
1.25A, according to the following formula:
ICLIM(TRKL) = 0.25A
24.9kΩ
5mΩ
= 1.25A
The battery float voltage is set at 10.8V according to
the following formula:
RBFB1 =
10.8
1.136
1
133kΩ ≈ 1.13MΩ
The bad battery detection time is set at 43 minutes
according to the following formula:
CTMR(nF) = tBADBAT(h) 138.5 =
43
60
138.5 = 100nF
Figure 14. 48V to 10.8V at 10A Buck Converter Charger for Three LiFePO4 Cells
1.13M
14.7k
127k
10k
3-CELL Li-Ion
BATTERY PACK
10.8V FLOAT
10A MAX CHARGE
CURRENT
NTHS0603
N02N1002J
1.15M
47nF
5m
12V, 15A
15V TO 60V
133k
CSN
CSP
BGATE
IGATE
BAT
OFB
FBG
BFB
NTC
CX
LTC4000
ITH
CC
IID
5m
LT3845
100F
OUT
VC
SHDN
IN
RST
CLN
IN
ENC
CHRG
FLT
VM
IIMON
IBMON
22.1k
CL
IL
TMR
GND BIAS
22.1k
1F
1.10M
100k
10nF
1F
0.1F
4000 F14
Si7135DP
3.0V
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4001 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:2A Synchronous Buck Li-Ion Charger |
| LTC4001-1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:2A Synchronous Buck Li-Ion Charger |
| LTC4001EUF | 制造商:Linear Technology 功能描述:Battery Charger Li-Ion/Li-Pol 2000mA 4.2V 16-Pin QFN EP |
| LTC4001EUF#PBF | 功能描述:IC CHARGER LI-ION BUCK 16-QFN 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(biāo)準(zhǔn)包裝:4,000 系列:- 功能:燃料，電量檢測計/監(jiān)控器 電池化學(xué):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 |
| LTC4001EUF#TRPBF | 功能描述:IC CHARGER LI-ION BUCK 16-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:61 系列:- 功能:電源管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:4.35 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:22-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:22-DFN（6x3）裸露焊盤 包裝:管件 |
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