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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)： | 10/24頁 |
| 文件大?。?/td> | 228K |
| 代理商： | LTC4011EFE#PBF |
18
LTC4011
4011p
APPLICATIO S I FOR ATIO
WU
UU
previously discussed. The application includes all average
cell voltage and battery temperature sensing circuitry
required for the LTC4011 to utilize its full range of charge
qualification, safety monitoring and fast charge termina-
tion features. A green LED indicates valid DC input voltage
and installed battery, while a pair of red LEDs indicates
charging. A yellow LED indicates fault conditions. The
grounded CHEM pin selects the NiMH charge termination
parameter set.
While the LTC4011 is a complete, standalone solution,
Figure 9 shows that it can also be interfaced to a host
microprocessor. The MCU can control the charger directly
with an open-drain I/O port connected to the VTEMP pin, if
that port is low leakage and can tolerate at least 2V. The
charger state is monitored on the four LTC4011 status
outputs. Charging of NiMH batteries is selected in this
example. However, NiCd (CHEM → VRT) parameters could
be chosen as well.
Unlike all of the other applications discussed so far, the
battery continues to power the system during charging.
The MCU could be powered directly from the battery or
from any type of post regulator operating from the battery.
In this configuration, the LTC4011 relies expressly on the
ability of the host MCU to know when load transients will
be encountered. The MCU should then pause charging
(and thus –V processing) during those events to avoid
premature fast charge termination. If the MPU cannot
reliably perform this function, full PowerPath control
should be implemented. Excessive battery load current
variations, such as those generated by a post-regulating
PWM, can generate sufficient voltage noise to cause the
LTC4011 to prematurely terminate a charge cycle and/or
prematurely restart a fast charge. In this case, it may be
necessary to inhibit the LTC4011 after charging is com-
plete until external gas gauge circuitry indicates that
recharging is necessary. Shutdown power is applied to the
LTC4011 through the body diode of Q2 in this application.
Figure 8. Full-Featured 2A LTC4011 Application
INFET
FAULT
CHRG
TOC
READY
VCC
TGATE
VCDIV
VCELL
VTEMP
LTC4011
DCIN
TIMER
GND
CHEM
VRT
INTVDD
SENSE
BAT
FROM
ADAPTER
4.5V TO 34V
10H
6V
NiCd PACK
WITH 10k NTC
(2AHr)
TO
SYSTEM
LOAD
0.05
10F
R2
33nF
30.9k
10.7k
22nF
0.1F
10k
51k
10F
4011 F08
R
G
Y
R
3k
20k
49.9k
3k
R5
10k
PGND
BGATE
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相關(guān)代理商/技術(shù)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(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(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 |
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