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參數(shù)資料
| 型號： | LTC4010EFE |
| 廠商： | Linear Integrated Systems |
| 英文描述： | High Efficiency Standalone Nickel Battery Charger |
| 中文描述： | 高效率的獨立鎳電池充電器 |
| 文件頁數(shù)： | 15/20頁 |
| 文件大?。?/td> | 205K |
| 代理商： | LTC4010EFE |
15
LTC4010
4010p
P-channel MOSFET Q4 functions as a switch to connect
the battery to the system load whenever the DC input
adapter is removed. If the maximum battery voltage is less
than the maximum rated V
GS
of Q4, diode D1 and resistor
R1 are not required. Otherwise choose the Zener voltage
of D1 to be less than the maximum rated V
GS
of Q4. R1
provides a bias current of (V
BAT
– V
ZENER
)/(R1 + 20k) for
D1 when the input adapter is removed. Choose R1 to make
this current, which is drawn from the battery, just large
enough to develop the desired V
GS
across D1.
While the LTC4010 is a complete, standalone solution,
Figure 8 shows that it can also be interfaced to a host mi-
croprocessor. The MCU can control the charger directly with
an open-drain I/O port connected to the V
TEMP
pin, if that
port is low leakage and can tolerate at least 2V. The charger
state is monitored on the three LTC4010 status outputs.
Charging of NiMH batteries is selected in this example.
However, NiCd 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 LTC4010 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 pre-
mature fast charge termination. If the MPU cannot reliably
perform this function, the battery shouldbe disconnected
from the load with a rectifier or switch during charging.
Excessive battery load current variations, such as those
generated by a post-regulating PWM, can generate suffi-
cient voltage noise to cause the LTC4010 to prematurely
terminate a charge cycle and/or prematurely restart a fast
charge. In this case, it may be necessary to inhibit the
LTC4010 after charging is complete until external gas gauge
circuitry indicates that recharging is necessary. Shutdown
power is applied to the LTC4010 through the body diode
of the P-channel MOSFET in this application.
Waveforms
Sample waveforms for a standalone application during a
typical charge cycle are shown in Figure 9. Note that these
waveforms are not to scale and do not represent the
complete range of possible activity. The figure is simply
intended to allow better conceptual understanding and to
highlight the relative behavior of certain signals generated
by the LTC4010 during a typical charge cycle.
Initially, the LTC4010 is in low power shutdown as the
system operates from a heavily discharged battery. A DC
adapter is then connected such that V
CC
rises above 4.25V
APPLICATIU
W
U
U
Figure 7. Full-Featured 2A LTC4010 Application
FAULT
CHRG
READY
V
CC
TGATE
V
CDIV
V
CELL
V
TEMP
LTC4010
TIMER
INTV
DD
GND
CHEM
SENSE
BAT
FROM
ADAPTER
5.5V TO 34V
10
μ
H
D1
6V
Q4
TO
SYSTEM
LOAD
0.05
NiMH PACK
WITH 10k NTC
4010 F07
Y
49.9k
R
G
20k
10k
R1 10k
0.1
μ
F
68nF
20
μ
F
33nF
20
μ
F
BGATE
PGND
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4011 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Efficiency Standalone Nickel Battery Charger |
| LTC4011_1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Efficiency Standalone Nickel Battery Charger |
| LTC4011CFE | 功能描述:IC BATT CHARGER HIEFF 20TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):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) |
| LTC4011CFE#PBF | 功能描述:IC BATT CHARGER HIEFF 20TSSOP 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 |
| LTC4011CFE#TR | 功能描述:IC BATT CHARGER HIEFF 20TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):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) |
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