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參數(shù)資料
| 型號(hào)： | LTC4008EGN#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 4A, High Efficiency, Multi-Chemistry Battery Charger; Package: SSOP; No of Pins: 20; Temperature Range: -40°C to +125°C |
| 中文描述： | BATTERY CHARGE CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封裝： | 0.150 INCH, LEAD FREE, PLASTIC, SSOP-20 |
| 文件頁數(shù)： | 4/24頁 |
| 文件大?。?/td> | 221K |
| 代理商： | LTC4008EGN#PBF |
LTC4008
12
4008fb
OPERATION
The thermistor detector performs a sample-and-hold
function. An internal clock, whose frequency is determined
by the timing resistor connected to RT, keeps switch S1
closed to sample the thermistor:
tSAMPLE = 127.5 20 RRT 17.5pF = 6.7ms,
for RRT = 150k
The external RC network is driven to approximately 4.5V
and settles to a nal value across the thermistor of:
V
VR
RR
RTH FINAL
TH
()
.
=
+
45
10
This voltage is stored by C7. Then the switch is opened
for a short period of time to read the voltage across the
thermistor.
tHOLD = 10 RRT 17.5pF = 26μs,
for RRT = 150k
When the tHOLD interval ends the result of the thermistor
testing is stored in the D ip-op (DFF). If the voltage at
NTC is within the limits provided by the resistor divider
feeding the comparators, then the NOR gate output will
be low and the DFF will set TBAD to zero and charging will
continue. If the voltage at NTC is outside of the resistor
divider limits, then the DFF will set TBAD to one, the charger
will be shut down, FAULT pin is set low and the timer will
be suspended until TBAD returns to zero (see Figure 4).
CLK
(NOT TO
SCALE)
VNTC
tSAMPLE
VOLTAGE ACROSS THERMISTOR
tHOLD
4008 F04
COMPARATOR HIGH LIMIT
COMPARATOR LOW LIMIT
Figure 4
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4009 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Voltage High Current Controller for Battery Charging and Power Management |
| LTC4009-1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Effi ciency, Multi-Chemistry Battery Charger |
| LTC4009-2 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Effi ciency, Multi-Chemistry Battery Charger |
| LTC4009CUF#PBF | 功能描述:IC CHARGER BATTERY MC 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(biāo)準(zhǔn)包裝:4,000 系列:- 功能:燃料，電量檢測(cè)計(jì)/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 |
| LTC4009CUF#TRPBF | 功能描述:IC CHARGER BATTERY MC 20-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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