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參數(shù)資料
| 型號： | LTC4011EFE#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | BATTERY CHARGE CONTROLLER, 615 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封裝： | 4.40 MM, PLASTIC, TSSOP-20 |
| 文件頁數(shù)： | 14/24頁 |
| 文件大?。?/td> | 228K |
| 代理商： | LTC4011EFE#PBF |
21
LTC4011
4011p
APPLICATIO S I FOR ATIO
WU
UU
that programs the correct number of series cells when it
is connected to the charger, along with indicating chem-
istry and providing temperature information.
Any of these battery pack charge control concepts could
be combined in a variety of ways to service custom
application needs.
1. Input capacitors should be placed as close as possible
to switching FET supply and ground connections with
the shortest copper traces possible. The switching
FETs must be on the same layer of copper as the input
capacitors. Vias should not be used to make these
connections.
2. Place the LTC4011 close to the switching FET gate
terminals, keeping the connecting traces short to
produce clean drive signals. This rule also applies to
IC supply and ground pins that connect to the switch-
ing FET source pins. The IC can be placed on the
opposite side of the PCB from the switching FETs.
3. Place the inductor input as close as possible to the
drain of the switching FETs. Minimize the surface area
of the switch node. Make the trace width the minimum
needed to support the programmed charge current.
Use no copper fills or pours. Avoid running the con-
nection on multiple copper layers in parallel. Minimize
capacitance from the switch node to any other trace or
plane.
4. Place the charge current sense resistor immediately
adjacent to the inductor output, and orient it such that
current sense traces to the LTC4011 are short. These
feedback traces need to be run together as a single pair
with the smallest spacing possible on any given layer
on which they are routed. Locate any filter component
on these traces next to the LTC4011, and not at the
sense resistor location.
5. Place output capacitors adjacent to the sense resisitor
output and ground.
6. Output capacitor ground connections must feed into
the same copper that connects to the input capacitor
ground before tying back into system ground.
Figure 12. NiMH Battery Pack Indicating Number of Cells
Figure 13. High Speed Switching Path
PCB Layout Considerations
To prevent magnetic and electrical field radiation and high
frequency resonant problems, proper layout of the com-
ponents connected to the LTC4011 is essential. Refer to
Figure 13. For maximum efficiency, the switch node rise
and fall times should be minimized. The following PCB
design priority list will help ensure proper topology. Lay-
out the PCB using this specific order.
7
1500mAhr
NiMH CELLS
BATTERY
PACK
VTEMP
8
VCELL
R2
4
CHEM
4011 F12
+
–
10k
NTC
4011 F13
VBAT
L1
VIN
HIGH
FREQUENCY
CIRCULATING
PATH
BAT
SWITCH NODE
CIN
SWITCHING GROUND
COUT
D1
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4012 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Effi ciency, Multi-Chemistry Battery Charger with PowerPath Control |
| LTC4012-1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Effi ciency, Multi-Chemistry Battery Charger with PowerPath Control |
| LTC4012-2 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Effi ciency, Multi-Chemistry Battery Charger with PowerPath Control |
| LTC4012-3 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Efficiency, Multi-Chemistry Battery Charger with PowerPath Control |
| LTC4012CUF#PBF | 功能描述:IC BATT CHRGR MC HI-EFF 20-QFN 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 |
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