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六六六六、、、、 绝对最大额定值绝对最大额定值绝对最大额定值绝对最大额定值 (1) 参数参数参数参数 符号符号符号符号 额定值额定值额定值额定值 单位单位单位单位 输入电源电压 VCC 7 V 输入电压 VIN-0

HE4054B Rev.1.1 — Oct. 25. 2016 1 单片具有热调节功能的微型线性电池管理芯片 ■ 产品概述 HE4054B 是一个完善的单片锂离子电池恒流/恒压线形 电源管理芯片。它薄的尺寸和小的外包装使它便于便携应

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 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 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 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

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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

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 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

1 附件 2： 政府会计准则第 2 号——投资 第一章 总 则 第一条 为了规范投资的确认、计量和相关信息的披露， 根据《政府会计准则——基本准则》，制定本准则。 第二条 本准则所称投资，是指政府会计主体按规定以

Training Text 液压符号 Editor:funeiien液 压 符 号 （选自：JIS B 0125） 表 1： 基 本 的 符 号 符 号 含 义 备 注 管路： 主管路 先导管路 漏损管路

是，由于农村教育条件的限制及农村学生家庭条件的影响， 导致其上学晚，语文基础薄弱，和城里的孩子存在很大差异。 本文主要探讨“互联网+”背景下如何对乡村学生的小学语 文教学进行改革。 一、农村小学现状分析 （一）学生情况分析。 1

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：