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Overvoltage

過電壓是指工頻下交流電壓均方根值升高，超過額定值的10%，并且持續(xù)時(shí)間大于1分鐘的長時(shí)間電壓變動(dòng)現(xiàn)象；過電壓的出現(xiàn)通常是負(fù)荷投切的瞬間的結(jié)果。正常使用時(shí)在感性或容性負(fù)載接通或斷開情況下發(fā)生。

Solutions for LED Driver Overvoltage Protection

Boost LED drivers are often used to drive LEDs in series. If an LED fails while open,Overvoltage protection (OVP) is necessary to avoid the damage to a boost integrated circuit (IC) or output capacitor. This application report presents the solutions to increase the TPS61043 LED driver OVP threshold.

標(biāo)簽： Overvoltage Protection Solutions Driver

上傳時(shí)間： 2013-10-14

上傳用戶：jiangfire
DN465 超低功耗升壓轉(zhuǎn)換器

Industrial remote monitoring systems and keep-alivecircuits spend most of their time in standby mode. Manyof these systems also depend on battery power, so powersupply effi ciency in standby state is very important tomaximize battery life. The LT®8410/-1 high effi ciencyboost converter is ideal for these systems, requiringonly 8.5μA of quiescent current in standby mode. Thedevice integrates high value (12.4M/0.4M) output feedbackresistors, signifi cantly reducing input current whenthe output is in regulation with no load. Other featuresinclude an integrated 40V switch and Schottky diode,output disconnect with current limit, built in soft-start,Overvoltage protection and a wide input range, all in atiny 8-pin 2mm × 2mm DFN package.

標(biāo)簽： 465 DN 超低功耗升壓轉(zhuǎn)換器

上傳時(shí)間： 2013-11-23

上傳用戶：新手無憂
單片機(jī)控制的鉛酸蓄電池充電電源

為了有效地提升鉛酸蓄電池的使用壽命，同時(shí)實(shí)現(xiàn)對充電過程的監(jiān)控，設(shè)計(jì)出一種用單片機(jī)控制的36 V鉛酸蓄電池充電電源。本電路采用反激式拓?fù)洌B續(xù)電流工作模式，電源管理IC設(shè)計(jì)在電源的副邊，由ELAN公司的EM78P258N單片機(jī)模擬，是用可編程器件模擬電源管理IC，實(shí)現(xiàn)智能電源低成本化的一次成功嘗試，通過對單片機(jī)的軟件設(shè)計(jì)實(shí)現(xiàn)了充電電源的狀態(tài)顯示、充電時(shí)間控制、報(bào)警、過溫保護(hù)、過壓保護(hù)、過流保護(hù)等功能。本充電器真正的實(shí)現(xiàn)了鉛酸蓄電池的三段式充電過程，其最高輸出功率可達(dá)90 W，效率約85%，成本不到20元，具有很高的市場競爭力。 Abstract: In order to extend the life of lead-acid battery efficiently and supervise the charging process meanwhile， a 36V lead-acid battery charge powe supply controlled by microcontroller is designed. The charger is flyback switching power supply and works in CCM mode. A EM78P258N microcontroller made by ELAN microelectronics corporation is used as power management IC which is designed at the secondary circuit. The project is a successful attempt to low-cost intelligent power used microcontroller simulating power management IC. The charger also has the functions of the status reveal， charge time control， alarming， thermal protect， current limit and Overvoltage protect by the software design. The circuit actually implements the three-step charge process， whose power is up to 90W and whose efficiency can get 85%. The net cost of this charger is less than 20 RMB， so that the charger is of powerful market competitiveness.

標(biāo)簽： 單片機(jī)控制充電電源鉛酸蓄電池

上傳時(shí)間： 2013-11-16

上傳用戶：cepsypeng
HX3248C

FFeeaattuurreess ? Input voltage range: 2.2 to 6V ? Programmable LED Current ? Drives LEDs Up to 27V ? Switching Frequency：up to 800KHz ? Wide dimming frequency range: 20KHz~ 360 KHz ? Programmable Overvoltage Protection ? Tiny SOP8/PP Package

標(biāo)簽： HX3248C

上傳時(shí)間： 2021-11-05

上傳用戶：aben
電路設(shè)計(jì)(英)

CHAPTER 1: THE OP AMP CHAPTER 2: OTHER LINEAR CIRCUITS CHAPTER 3: SENSORS CHAPTER 4: RF/IF CIRCUITS CHAPTER 5: FUNDAMENTALS OF SAMPLED DATA SYSTEMS CHAPTER 6: CONVERTERS CHAPTER 7: DATA CONVERTER SUPPORT CIRCUITS CHAPTER 8: ANALOG FILTERS CHAPTER 9: POWER MANAGEMENT CHAPTER 10: PASSIVE COMPONENTS CHAPTER 11: Overvoltage EFFECTS ON ANALOG INTEGRATED CIRCUITS CHAPTER 12: PRINTED CIRCUIT BOARD (PCB) DESIGN ISSUES CHAPTER 13: DESIGN DEVELOPMENT TOOLS

標(biāo)簽： 運(yùn)算放大器轉(zhuǎn)換器模擬濾波器

上傳時(shí)間： 2021-12-21

上傳用戶：wangshoupeng199
PW2601_2.0.pdf規(guī)格書下載

The PW2601 is a charger front-end integrated circuit designed to provide protection to Li-ionbatteries from failures of charging circuitry. The device monitors the input voltage, battery voltageand the charging current to make sure all three parameters are operated in normal range. Thedevice will switch off internal MOSFET to disconnect IN to OUT to protect load when any of inputvoltage, output current exceeds the threshold. The Over temperature protection (OTP) functionmonitors chip temperature to protect the device. The PW2601 also can protect the system’sbattery from being over charged by monitors the battery voltage continuously. The deviceoperates like a linear regulator, maintaining a 5.1V output with input voltages up to the input Overvoltage threshold.The PW2601 is available in DFN-2x2-8L package. Standard products are Pb-free and Halogenfree

標(biāo)簽： pw2601

上傳時(shí)間： 2022-02-11

上傳用戶：
移動(dòng)機(jī)器人的鋰電池BMS管理系統(tǒng)設(shè)計(jì)

鋰電池BMS管理技術(shù)是移動(dòng)機(jī)器人的關(guān)鍵技術(shù),本文設(shè)計(jì)了基于bq76PL455、STM32F103的鋰電池管理系統(tǒng),實(shí)現(xiàn)了電池組電壓、電流、過壓、過流等狀態(tài)監(jiān)測;系統(tǒng)配置均衡電路,電池充電過程中若出現(xiàn)電池單體電壓不平衡現(xiàn)象,會(huì)觸發(fā)均衡電路,進(jìn)而提高電池的安全性,延長使用壽命。Lithium battery BMS management technology is the key technology of mobile robot.The lithium battery management system based on bq76PL455 and STM32F103 is proposed to realize the monitoring of battery pack voltage,current,Overvoltage and overcurrent.The system is equipped with equalization circuit.When the battery cell voltage imbalance occurs,the equalization circuit is triggered to improve the safety and service life of the battery.

標(biāo)簽： 移動(dòng)機(jī)器人鋰電池 bms管理系統(tǒng)

上傳時(shí)間： 2022-04-02

上傳用戶：

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