LK1628是一種帶鍵盤掃描接口的LED驅(qū)動控制專用電路,內(nèi)部集成有MCU數(shù)字接口、數(shù)據(jù)鎖存器、LED驅(qū)動、鍵盤掃描等電路。且在輸入端口內(nèi)置上拉,可在應(yīng)用方案中省去外部上拉電阻。采用CMOS工藝,VDD供電為5V,超強的輸入端口干擾能力,輸入端口內(nèi)置上拉電阻,顯示模式:4位×13段—7位×10段,按鍵掃描:10×2位。輝度調(diào)節(jié)電路(占空比8級可調(diào)),串行接口(CLK,STB,DI/O),振蕩方式:內(nèi)置RC振蕩,內(nèi)置上電復(fù)位電路,ESD HBM:﹥8KV,SOP28的封裝形式。
標(biāo)簽: 1628 LED LK 驅(qū)動控制
上傳時間: 2013-10-17
上傳用戶:YUANQINHUI
高的工作電壓高達100V N雙N溝道MOSFET同步驅(qū)動 The D810DCDC is a synchronous step-down switching regulator controller that can directly step-down voltages from up to 100V, making it ideal for telecom and automotive applications. The D810DCDC uses a constant on-time valley current control architecture to deliver very low duty cycles with accurate cycle-by-cycle current limit, without requiring a sense resistor. A precise internal reference provides 0.5% DC accuracy. A high bandwidth (25MHz) error amplifi er provides very fast line and load transient response. Large 1Ω gate drivers allow the D810DCDC to drive multiple MOSFETs for higher current applications. The operating frequency is selected by an external resistor and is compensated for variations in VIN and can also be synchronized to an external clock for switching-noise sensitive applications. Integrated bias control generates gate drive power from the input supply during start-up and when an output shortcircuit occurs, with the addition of a small external SOT23 MOSFET. When in regulation, power is derived from the output for higher effi ciency.
上傳時間: 2013-10-24
上傳用戶:wd450412225
When a system designer specifies a nonisolated dc/dc powermodule, considering the needed input voltage range isequally as important as considering the required performanceattributes and features. Generally, nonisolated moduleshave either a narrow or a wide input voltage range. Narrowinputmodules typically have a nominal input voltage of3.3, 5, or 12 V. For systems that operate from a tightlyregulated input bus—such as those that do not use batterybackup—a narrow-input module is often adequate sincethe input remains fairly stable.Offering greater flexibility, wide-input modules operatewithin a range of 7 to 36 V, which includes the popular12- or 24-V industrial bus. This enables a single module tobe used for generating multiple voltages. These modulesare ideal for industrial controls, HVAC systems, vehicles,medical instrumentation, and other applications that usea loosely regulated distribution bus. In addition, systemspowered by a rectifier/battery charger with lead-acidbattery backup almost always require wide-input modules.System designers who choose power supplies may wantto take a close look at the latest generation of wide-inputdc/dc modules.
標(biāo)簽: Wide-input modules offer dc
上傳時間: 2014-12-24
上傳用戶:dragonhaixm
找一塊電源仔細看一下,在電源部分中,跨接L-N之間的小方塊(單位是μF)電容就是X電容,通常在是電源入口的第一個;同樣,在電源部分的跨接L-PE和N-PE之間的藍色的安規(guī)電容(單位pF)就是Y電容,通常是成對出現(xiàn)的。 或者你可以形象的看,X電容具有2個輸入端,2個輸出端,很象X;Y電容具有一個輸入端,一個輸出端以及一個公共的大地,很象一個Y 沒有什么概念的,一個在差模回路上,一個在共模回路上,X、Y的名稱純粹是一個稱呼,就象是X和Y軸一樣 X電容主要用于流電源線路中,此時當(dāng)電容失時不致產(chǎn)生線間放電。X電容器的測試條件是:在交流電壓的有效值*1.5的電壓下工作100Hour;再加上1KV的高壓測試。Y電容器在一旦失效會導(dǎo)致放電危險(尤其是對外殼)時是強制使用的。Y類型電容器的測試條件是:在交流電壓的有效值*1.7的電壓下工作100Hour,加上2KV高壓測試。如果電容器用于不接地的II類產(chǎn)品中,則要增加至4KV。
上傳時間: 2013-10-24
上傳用戶:1583264429
四個按鍵,第一個按鍵時分秒的選擇,可閃爍哦,第二個按鍵和第三個按鍵調(diào)時分秒的加減,第四個按鍵控制12和24的轉(zhuǎn)換,希望下載的親好好分析哦,歡迎下載。
上傳時間: 2013-10-24
上傳用戶:yeling1919
24秒倒計時和相關(guān)LED燈亮
上傳時間: 2013-11-07
上傳用戶:rnsfing
單片機籃球24秒 c語言
標(biāo)簽: 倒計時器
上傳時間: 2013-11-01
上傳用戶:l銀幕海
TLC2543是TI公司的12位串行模數(shù)轉(zhuǎn)換器,使用開關(guān)電容逐次逼近技術(shù)完成A/D轉(zhuǎn)換過程。由于是串行輸入結(jié)構(gòu),能夠節(jié)省51系列單片機I/O資源;且價格適中,分辨率較高,因此在儀器儀表中有較為廣泛的應(yīng)用。 TLC2543的特點 (1)12位分辯率A/D轉(zhuǎn)換器; (2)在工作溫度范圍內(nèi)10μs轉(zhuǎn)換時間; (3)11個模擬輸入通道; (4)3路內(nèi)置自測試方式; (5)采樣率為66kbps; (6)線性誤差±1LSBmax; (7)有轉(zhuǎn)換結(jié)束輸出EOC; (8)具有單、雙極性輸出; (9)可編程的MSB或LSB前導(dǎo); (10)可編程輸出數(shù)據(jù)長度。 TLC2543的引腳排列及說明 TLC2543有兩種封裝形式:DB、DW或N封裝以及FN封裝,這兩種封裝的引腳排列如圖1,引腳說明見表1 TLC2543電路圖和程序欣賞 #include<reg52.h> #include<intrins.h> #define uchar unsigned char #define uint unsigned int sbit clock=P1^0; sbit d_in=P1^1; sbit d_out=P1^2; sbit _cs=P1^3; uchar a1,b1,c1,d1; float sum,sum1; double sum_final1; double sum_final; uchar duan[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}; uchar wei[]={0xf7,0xfb,0xfd,0xfe}; void delay(unsigned char b) //50us { unsigned char a; for(;b>0;b--) for(a=22;a>0;a--); } void display(uchar a,uchar b,uchar c,uchar d) { P0=duan[a]|0x80; P2=wei[0]; delay(5); P2=0xff; P0=duan[b]; P2=wei[1]; delay(5); P2=0xff; P0=duan[c]; P2=wei[2]; delay(5); P2=0xff; P0=duan[d]; P2=wei[3]; delay(5); P2=0xff; } uint read(uchar port) { uchar i,al=0,ah=0; unsigned long ad; clock=0; _cs=0; port<<=4; for(i=0;i<4;i++) { d_in=port&0x80; clock=1; clock=0; port<<=1; } d_in=0; for(i=0;i<8;i++) { clock=1; clock=0; } _cs=1; delay(5); _cs=0; for(i=0;i<4;i++) { clock=1; ah<<=1; if(d_out)ah|=0x01; clock=0; } for(i=0;i<8;i++) { clock=1; al<<=1; if(d_out) al|=0x01; clock=0; } _cs=1; ad=(uint)ah; ad<<=8; ad|=al; return(ad); } void main() { uchar j; sum=0;sum1=0; sum_final=0; sum_final1=0; while(1) { for(j=0;j<128;j++) { sum1+=read(1); display(a1,b1,c1,d1); } sum=sum1/128; sum1=0; sum_final1=(sum/4095)*5; sum_final=sum_final1*1000; a1=(int)sum_final/1000; b1=(int)sum_final%1000/100; c1=(int)sum_final%1000%100/10; d1=(int)sum_final%10; display(a1,b1,c1,d1); } }
上傳時間: 2013-11-19
上傳用戶:shen1230
適用于51單片機的串口發(fā)n
上傳時間: 2014-12-25
上傳用戶:qingzhuhu
89c51一種用N+1條線實現(xiàn)矩陣鍵盤
標(biāo)簽: 矩陣鍵盤
上傳時間: 2014-12-26
上傳用戶:lhw888
蟲蟲下載站版權(quán)所有 京ICP備2021023401號-1