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最短，当电池接近完全饱和，大概在 4.15V 左右， 将自动转换为恒压(CV)的充电周期。在恒压充电周期， 充电电流将会减小使电池逐渐饱和而没有过饱和的危险，这是必要的，因为锂电池不能过饱和 50mV，否则就有爆炸 的危险。

Features Input voltage: 3V~20V Output range: 2.5V~5.0V Outputcurrent:250mA(Within Max PowerDissipation) Quiescent current: 2μA Typ. Dropout voltage: 200mV @VOUT=3.3V,IOUT=100mA Good line regulation: 0.01% Good load regulation:5mV@1mA≤Io≤50mA Low temperature coefficient: 0.07mV/℃Applications Battery-powered equipment Voltage regulator for microprocessor Voltage regulator for LAN cards Wireless communication equipment Audio/Video equipment

Features Maximum output current is 1.1A Range of operation input voltage: Max 30V Line regulation: 0.03%/V (typ.) Standby current: 1.8mA (typ.) Load regulation: 0.2%/A (typ.) Environment Temperature: -20℃~85℃Applications Power Management for Computer MotherBoard, Graphic Card LCD Monitor and LCD TV DVD Decode Board ADSL Modem Post Regulators For Switching Supplies

Features Low voltage drop: 0.17V@100mA High input voltage: 15V Low temperature coefficient Large Output Current: >0.35A Low Quiescent Current: 1.0uA Output voltage accuracy: tolerance ±2% Built-in current limiter SOT89 and SOT23-3 packageApplications Battery-powered equipment Hand-Hold Equipment GRS Receivers Wireless LAN

Features Output Current of 500mA Thermal Overload Protection Short Circuit Protection Output transistor safe area protection No external components Package：TO252 Output voltage accuracy: tolerance ±5%

20V/85mΩ@-4.5V P-Channel MOSFETFeatures VDS(max)=-20V ID(max)=-3.3A RDS(ON) =85mΩ(max)@VGS = -4.5V RDS(ON) =120mΩ(max)@VGS = -2.5V Improved dv/dt capability Green Device Available Fast switching

Features Protection of battery cell reverse connection Programmable charge current up to 800mA No MOSFET sense resistor or blocking dioderequired Complete linear Charger for single CellLithium-Ion Batteries CC and CV operation with thermal regulationto maximize Rate without risk of overheating Preset 4.2V charge voltage with ±1%accuracy Automatic Recharge C/10 charge termination 2.9V trickle current charge threshold Soft-Start limits inrush current Available in SOT23-5 package

Features Low power consumption Low voltage drop Low temperature coefficient High input voltage (up to 18V) Output voltage accuracy: tolerance ±2% SOT89, SOT23 packageApplications Battery-powered equipment Communication equipment Audio/Video equipment

Features Hall effect Switch Sensor Wide operating voltagerange :3.5V~35V Open Collector Pre-Driver Maximum output sink current: 50mA Operating Temperature:-40℃~+125℃ Package：SOT23-3L N-pole inductionApplications Rotor Position Sensing Current Switch Brush-less DC Motor Revolution counting Encoder RPM Detection Brush-less DC Fan Speed measurement

Features Output Current of 100mA Thermal Overload Protection Short Circuit Protection Output transistor safe area protection No external components Package：SOT89-3 and TO92 Output voltage accuracy: tolerance ±3%

Features Protection of battery cell reverse connection Programmable charge current up to 1.1A No MOSFET sense resistor or blocking dioderequired Complete linear Charger for single Cell Lithium-IonBatteries CC and CV operation with thermal regulation tomaximize Rate without risk of overheating Preset 4.2V charge voltage with ±1% accuracy Automatic Recharge Two Status Indication for Charge status, no batteryand battery failure indicators C/10 charge termination 55μ A supply current in shutdown 2.9V trickle current charge threshold Soft-Start limits inrush current Battery Temperature Sensing Available in SOP-8 and ESOP-8 package

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Features Low power consumption Low voltage drop Low temperature coefficient Ultra low quiescent current: 2μA(typ.) High input voltage (up to 15V) Maximum output current: 250mA Output voltage accuracy: tolerance ±2% TO92, SOT89 ,SOT23-3 and SOT23 package

Features External parts: Coil, capacitor Output voltage: Settable to between2.1V to 5.5V in 0.1V steps Maximum Oscillationfrequency :300KHz Accuracy of ±2% High efficiency :95% Package: SOT23 and TO92Applications Digital cameras Electronic notebooks and PDAS Portable CD/MD players Cameras , video equipment Communications equipment Power supply for microcomputers

Features Output Current of 1.5A Thermal Overload Protection Short Circuit Protection Output transistor safe area protection No external components Package：TO220 Output voltage accuracy: tolerance ±2%General DescriptionTX78XX is three-terminal positive regulators. Oneof these regulators can deliver up to 1.5A ofoutput current. The internal limiting and thermal-shutdown features of the regulator make themessentially immune to overload. When used as areplacement for a zener diode -resistorCombination, an effective improvement in outputimpedance can be obtained, together with

企业年终工作总结 20XX 年是公司实行基础管理，打造品牌的一年，是公 司发展战略的关键一年。20XX 年也是我在公司参加工作的 第二年。在过去的一年里，在部门领导、同事的帮助和指 导下，我的工作能力，业务水平有了很大的提高。通过一

供电企业年终总结 今年以来，在集团公司正确领导下，××供电公司着 眼建设“一强三优”现代公司，围绕“三抓一创”工作思 路，全面落实业绩考核责任书，各项工作取得新成绩。 一、20xx 年工作基本情况 各项经济指标再创新高。1-10

企业年终总结 今年是我司实施经营发展思路的第二年，是我司的经 营能否取得突破，包括建材经营能否摆脱多年亏损的局 面，打好翻身仗在内的关键一年，也是上级对我司进行托 管重组，我司深化改革、进行资产重组的关键一年。搞好

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企业基本法 企业使命： 一、 为客户提供整洁、舒适、安全的环境，从而美化生活，并帮助人类社会 共同进步。 二、 帮助员工获得业绩，从而获得社会尊重与个人成长并实现物质与精神两 方面的幸福。 企业愿景：