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參數(shù)資料
| 型號(hào)： | LTC4071EDDB#TRMPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | 3 X 2 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, MO-229WECD-1, DFN-8 |
| 文件頁(yè)數(shù)： | 6/18頁(yè) |
| 文件大小： | 219K |
| 代理商： | LTC4071EDDB#TRMPBF |
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LTC4071
14
4071fb
This system has two modes of operation, charging where
thebatteriesarebeingchargedfromenergyharvestedfrom
the piezoelectric generator while the load is negligible.
And discharging, where the load is pulling current from
the batteries, but insufficient energy is being harvested
to power the load.
This application allows the load to periodically draw more
current than would otherwise be available from the piezo-
electric generator by storing excess charge in a stack of
two Li-Ion cells. Each Li-Ion cell is protected from over-
charge and over discharge by a LTC4071 shunt regulator.
The two LTC4071s regulate VIN of the LTC3588-1 to 8.2V
(with both ADJ pins floating) shunting any excess current
that is not used by the load once the batteries achieve
their float voltages. When the load requires more current
than is available from the piezoelectric generator, the
voltage at VIN droops and current is supplied from the two
Li-Ion cells to power the step-down switching regulator.
If the load pulls enough current to discharge the batteries
below VLBD, the LTC4071s disconnect the batteries, and
VIN collapses until the piezoelectric generator resumes
supplying current.
The application in Figure 8 illustrates how to implement
“ship-mode,” where a battery is co-packaged with the
LTC4071 and then the entire device is latched-off, leaving
the battery fully charged but with the LTC4071 switched
off. The co-packaged battery and LTC4071 can then be
stored with a long shelf-life before being activated for
normal use.
Ship-mode is triggered by pulling enough current through
the LTC4071 so as to drop VCC below the LBD threshold.
The current pulse amplitude should be less than 400mA
with a duration of less than 10ms. The peak current neces-
sary, IPK, depends on the equivalent series resistance of
the battery, BESR, summed with the RDSON of the BAT-VCC
FET, the battery voltage, VBAT and the selected disconnect
voltage, VLBD:
IPK =
VBAT VLBD
RDSON +BESR
Users may test that ship mode has been triggered by
simply checking if VCC is at GND and that there are no
longer any NTCBIAS pulses.
Re-activation of the LTC4071 and the battery requires
either applying power normally, or briefly shorting VCC
to BAT to turn it on.
applicaTions inForMaTion
Figure 8. LTC4071 Ship-Mode Application for Extended Shelf Life
LTC4071
BAT
NTCBIAS
NTC
ADJ
LBSEL
1F
CURRENT PULSE
TO TRIGGER
SHIP-MODE
GND
Li-Ion
VCC
IPK
0
+
4071 F08
*NTHS0402N02N1002F
10k
T*
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相關(guān)代理商/技術(shù)參數(shù) |
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| LTC4071EMS8E | 制造商:LINEAR 制造商全稱:LINEAR 功能描述:Li-Ion/Polymer Shunt Battery Charger System with Low Battery Disconnect |
| LTC4071EMS8E#PBF | 功能描述:IC LI-ION/POLY BATT CHRGR 8-MSOP 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 |
| LTC4071EMS8E#PBF | 制造商:Linear Technology 功能描述:IC BATT CHRG Li-Ion Li-Polymer MSOP8 制造商:Linear Technology 功能描述:IC, BATT CHRG, Li-Ion, Li-Polymer, MSOP8 |
| LTC4071EMS8E#TRPBF | 功能描述:IC LI-ION/POLY BATT CHRGR 8-MSOP 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(pán) 供應(yīng)商設(shè)備封裝:22-DFN（6x3）裸露焊盤(pán) 包裝:管件 |
| LTC4071IDDB | 制造商:LINEAR 制造商全稱:LINEAR 功能描述:Li-Ion/Polymer Shunt Battery Charger System with Low Battery Disconnect |
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