IC 特色 : ˙ 半諧振模式之 ZVS零電壓切換 , 能有效降低切換損失 , 提高效率 , 并具展頻功能 , 改善EMI . ˙ 輕 / 重載的 Duty Factor 皆在 CCM 與 DCM 邊緣 , 是最能發(fā)揮次級(jí) "同步整流" 效率的一種工作模式 . ˙ 空載時(shí)進(jìn)入 Cycle Skipping ( Typical 0.3W ) , 有效達(dá)成環(huán)保規(guī)範(fàn) . ˙ 內(nèi)建 "LEB前緣遮沒" 功能 , 避免電流迴授失真 . ˙ 能隨輸入電壓變化 , 自動(dòng)補(bǔ)償 OPP過功率保護(hù)點(diǎn) . ˙ 精密的 OVP 過壓保護(hù)點(diǎn)可自行設(shè)定 . ˙ 完整的保護(hù)功能 : OVP過壓保護(hù) , OCP過流保護(hù) , OPP過載保護(hù) , SWP線圈短路保護(hù) , SCP輸出短路保護(hù) , OTP過溫度保護(hù) .
上傳時(shí)間： 2014-12-24
上傳用戶：回電話#
介紹一種無極可調(diào)交流電子負(fù)載設(shè)計(jì)的新方法，由ATmega48單片機(jī)輸出PWM波，通過上位機(jī)設(shè)定不同的占空比控制場(chǎng)效應(yīng)管的通斷時(shí)間，即改變流過場(chǎng)效應(yīng)管的平均電流。根據(jù)電流的大小，可以等效為相應(yīng)的負(fù)載，并將采集的電流值顯示在上位機(jī)上。文中對(duì)該系統(tǒng)的軟﹑硬件設(shè)計(jì)思路作了詳細(xì)的分析，闡述了其設(shè)計(jì)原理。 Abstract: A new type electronic load is introduced.Due to ATmega48 microcomputer output PWM wave.The different Duty is set ratio through PC to control FET turn-on time.We can equivalent homologous load according the current and display the current at PC.The hardware and software designing are analysed in detail. The principle is explained and the output is also given.
標(biāo)簽： ATmega 48 單片機(jī) 交流電子
上傳時(shí)間： 2013-11-23
上傳用戶：蟲蟲蟲蟲蟲蟲
在Multisim 10軟件環(huán)境下，設(shè)計(jì)一種由運(yùn)算放大器構(gòu)成的精確可控矩形波信號(hào)發(fā)生器，結(jié)合系統(tǒng)電路原理圖重點(diǎn)闡述了各參數(shù)指標(biāo)的實(shí)現(xiàn)與測(cè)試方法。通過改變RC電路的電容充、放電路徑和時(shí)間常數(shù)實(shí)現(xiàn)了占空比和頻率的調(diào)節(jié)，通過多路開關(guān)投入不同數(shù)值的電容實(shí)現(xiàn)了頻段的調(diào)節(jié)，通過電壓取樣和同相放大電路實(shí)現(xiàn)了輸出電壓幅值的調(diào)節(jié)并提高了電路的帶負(fù)載能力，可作為頻率和幅值可調(diào)的方波信號(hào)發(fā)生器。Multisim 10仿真分析及應(yīng)用電路測(cè)試結(jié)果表明，電路性能指標(biāo)達(dá)到了設(shè)計(jì)要求。 Abstract: Based on Multisim 10， this paper designed a kind of rectangular-wave signal generator which could be controlled exactly composed of operational amplifier， the key point was how to implement and test the parameter indicators based on the circuit diagram. The Duty and the frequency were adjusted by changing the time constant and the way of charging and discharging of the capacitor， the width of frequency was adjusted by using different capacitors provided with multiple switch， the amplitude of output voltage was adjusted by sampling voltage and using in-phase amplifier circuit，the ability of driving loads was raised， the circuit can be used as squarewave signal generator whose frequency and amplitude can be adjusted. The final simulation results of Multisim 10 and the tests of applicable circuit show that the performance indicators of the circuit meets the design requirements.
標(biāo)簽： Multisim 矩形波 信號(hào)發(fā)生器 仿真
上傳時(shí)間： 2014-01-21
上傳用戶：shen007yue
he LPC932 can be used to create a Pulse Width Modulated PWM signal. That s an analog signal, with only 2 discrete levels, for example 0V and 5V and a constant period. The current value of this signal at a certain poiTnt of time is proportional to its Duty Cycle. That s the High Time during one period divided by the period. It can also be calculated as the average value during a particular period. That means after low pass filtering, (e.g. RC circuit) the signal becomes analog, with an actual value controlled by the microcontroller. The PWM functionality enables the LPC932 to control for example the speed of DC motors or the brightness of electric lighting.
標(biāo)簽： signal Modulated analog create
上傳時(shí)間： 2015-05-14
上傳用戶：CHINA526
本系統(tǒng)適合中小規(guī)模賓館使用，有旅客登記、員工管理功能，同時(shí)本著責(zé)任明確原則，每個(gè)房間都由一個(gè)管理員負(fù)責(zé)。相應(yīng)就有三張表：旅客信息登記表（hotel），員工信息管理表（info），責(zé)任表（Duty）。同時(shí)為了信息安全性，進(jìn)行任何操作之前都必須通過密碼登陸界面，相應(yīng)設(shè)一個(gè)用戶表（users）。附優(yōu)秀論文說明。
標(biāo)簽： 模
上傳時(shí)間： 2015-08-23
上傳用戶：hullow
A digital fi‘equeney meter designed with FPGA development software Q-~us 11 is introduced．The 1 Hz—l MHz input measured pulse signals of the digital ii‘equency meter can be used for measuring frequency，period，pulse width and Duty ratio，etc．The test results stably display O71 3 seven—segment numeric tubes，and the measuring ranges may be switched over automatically．The measuring error is equal to or less than 0．1％．
標(biāo)簽： development introduced designed software
上傳時(shí)間： 2016-04-09
上傳用戶：stewart·
This example demonstrates the use of the ADC block and PWM blocks. The generated DSP code produces the pulse waveform whose Duty cycle is changing as the voltage applied to ADC input changes. The waveform period is kept constant.
標(biāo)簽： demonstrates the generated produces
上傳時(shí)間： 2016-05-17
上傳用戶：sjyy1001
SimpliciTI™ -1.0.3.exe for CC11xx and CC25xx SimpliciTI is a simple low-power RF network protocol aimed at small (<256) RF networks. Such networks typically contain battery operated devices which require long battery life, low data rate and low Duty cycle and have a limited number of nodes talking directly to each other or through an access point or range extenders. Access point and range extenders are not required but provide extra functionality such as store and forward messages. With SimpliciTI the MCU resource requirements are minimal which results in the low system cost.
標(biāo)簽： SimpliciTI low-power network simple
上傳時(shí)間： 2014-11-05
上傳用戶：rishian
SimpliciTI™ -1.0.4.exe for CC2430 SimpliciTI is a simple low-power RF network protocol aimed at small (<256) RF networks. Such networks typically contain battery operated devices which require long battery life, low data rate and low Duty cycle and have a limited number of nodes talking directly to each other or through an access point or range extenders. Access point and range extenders are not required but provide extra functionality such as store and forward messages. With SimpliciTI the MCU resource requirements are minimal which results in the low system cost.
標(biāo)簽： SimpliciTI low-power protocol network
上傳時(shí)間： 2016-05-21
上傳用戶：R50974
SOPC實(shí)驗(yàn)--自定義PWM組件:以帶一個(gè)Avalon Slave 接口的PWM 組件為例，說明如何自定義組件。，一個(gè)Avalon Slave 接口可以有clk、chipselect、address、read、readdata、write 及writedata 等信號(hào)，但這些信號(hào)都不是必需的。 一、功能 我們要實(shí)現(xiàn)的PWM 組件具有以下功能： 1． PWM 的周期可改，用period 寄存器存儲(chǔ)； 2． PWM 的占空比可改，用Duty 寄存器存儲(chǔ)。 二、Avalon Slave 接口信號(hào)的設(shè)計(jì) 1．Clk：為PWM 提供時(shí)鐘； 2．Write：寫信號(hào)，可以通過Avalon Slave 總線將period 和Duty 值從Nios II 應(yīng)用程序 傳送到組件邏輯中。 3．Writedata：寫數(shù)據(jù)。通過此數(shù)據(jù)線傳送period 和Duty 值。 4．Address：本例中有兩個(gè)寄存器，因此可用一根地址線表示。 5．全局信號(hào)。本例中PWM 的輸出用來驅(qū)動(dòng)LED 燈顯示，這個(gè)信號(hào)不屬于Avalon 接 口信號(hào)。
標(biāo)簽： PWM Avalon Slave SOPC
上傳時(shí)間： 2013-12-28
上傳用戶：bibirnovis
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