车载usb充电器电路图,原理图分享-KIA MOS管

车载USB充电器电路

车载(zai)USB充(chong)电器电路是一个典(dian)型(xing)的降压式(shi)变换电路（BUCK电路），DC-DC的降压电路。

车载usb充电器电路

输入电压

车(che)(che)载(zai)USB充电(dian)(dian)(dian)器(qi)是(shi)(shi)插在(zai)汽车(che)(che)的点烟(yan)器(qi)上(shang)工(gong)(gong)作(zuo)的，点烟(yan)器(qi)的直流电(dian)(dian)(dian)压是(shi)(shi)由汽车(che)(che)上(shang)蓄电(dian)(dian)(dian)池供应(ying)的。小(xiao)轿(jiao)车(che)(che)、SUV点烟(yan)器(qi)上(shang)的电(dian)(dian)(dian)是(shi)(shi)压是(shi)(shi)DC12V，大(da)(da)型车(che)(che)点烟(yan)器(qi)上(shang)的电(dian)(dian)(dian)是(shi)(shi)压是(shi)(shi)DC24V。因(yin)此设计车(che)(che)载(zai)USB充电(dian)(dian)(dian)器(qi)输入电(dian)(dian)(dian)压要12-24VDC宽(kuan)电(dian)(dian)(dian)压输入，以(yi)达到大(da)(da)小(xiao)汽车(che)(che)通用。因(yin)此大(da)(da)家(jia)在(zai)选用时，要注意输入电(dian)(dian)(dian)压范围是(shi)(shi)否(fou)与车(che)(che)相符。如果电(dian)(dian)(dian)压不符，就会存在(zai)安全(quan)隐(yin)患，也会导致车(che)(che)载(zai)USB充电(dian)(dian)(dian)器(qi)不工(gong)(gong)作(zuo)和容易损坏。

输(shu)入(ru)配(pei)保险管

当电(dian)路出现短路或电(dian)流过(guo)大时(shi)能在(zai)第(di)一时(shi)间迅速切断(duan)充电(dian)器电(dian)路，以避(bi)免(mian)起火等不可控(kong)意(yi)外事件发生，保(bao)证(zheng)汽车(che)和人身安全(quan)始终是(shi)最重要(yao)的，提高安全(quan)防范用车(che)意(yi)识。因此(ci)在(zai)选用时(shi)，要(yao)注意(yi)车(che)载(zai)USB充电(dian)器是(shi)否(fou)具备输入短路保(bao)护。

集成电路U1

车(che)载USB充电(dian)(dian)(dian)器(qi)电(dian)(dian)(dian)路(lu)(lu)核心是U1，SOP8-EP集成电(dian)(dian)(dian)路(lu)(lu)封装，SOP8-EP为常(chang)规SOP8类型(xing)下(xia)带散(san)(san)(san)热(re)(re)(re)PAD，集成电(dian)(dian)(dian)路(lu)(lu)底部带有散(san)(san)(san)热(re)(re)(re)片(pian)可以线路(lu)(lu)板大(da)面积(ji)敷(fu)铜(tong)提(ti)(ti)高散(san)(san)(san)热(re)(re)(re)，因此具备(bei)(bei)(bei)2A的驱动能(neng)力。内(nei)置过(guo)(guo)流(liu)和(he)短路(lu)(lu)保(bao)(bao)(bao)、过(guo)(guo)温度保(bao)(bao)(bao)护(hu)(hu)(hu)功能(neng)，具备(bei)(bei)(bei)恒(heng)压(ya)CV，恒(heng)流(liu)CC，过(guo)(guo)压(ya)保(bao)(bao)(bao)护(hu)(hu)(hu)OVP等功能(neng)，输出过(guo)(guo)压(ya)保(bao)(bao)(bao)护(hu)(hu)(hu)。这些功能(neng)在(zai)设计上要(yao)考虑周到(dao)，确保(bao)(bao)(bao)电(dian)(dian)(dian)路(lu)(lu)安全和(he)电(dian)(dian)(dian)路(lu)(lu)工(gong)作可靠。因此大(da)家在(zai)选(xuan)用时，车(che)载USB充电(dian)(dian)(dian)器(qi)要(yao)具备(bei)(bei)(bei)过(guo)(guo)流(liu)、电(dian)(dian)(dian)压(ya)、短路(lu)(lu)、过(guo)(guo)温保(bao)(bao)(bao)护(hu)(hu)(hu)功能(neng)，提(ti)(ti)高安全防范(fan)用车(che)意识。

USB车载充电器适配器电路

这是一个直流(liu)直流(liu)电(dian)(dian)(dian)源转换器，可以安全(quan)地将12V汽(qi)(qi)车(che)电(dian)(dian)(dian)池电(dian)(dian)(dian)压转换为(wei)稳定(ding)的(de)5V。该USB车(che)载充(chong)电(dian)(dian)(dian)器电(dian)(dian)(dian)路可用于从汽(qi)(qi)车(che)点烟(yan)器插座向(xiang)需要5伏的(de)便携式设备(bei)供(gong)电(dian)(dian)(dian)。该电(dian)(dian)(dian)路可以使(shi)用汽(qi)(qi)车(che)的(de)仪表板(ban)板(ban)点烟(yan)器插座为(wei)任何USB电(dian)(dian)(dian)源操作设备(bei)供(gong)电(dian)(dian)(dian)/充(chong)电(dian)(dian)(dian)。

点烟器(qi)插(cha)座提供的(de)直流电源馈送到(dao)可调(diao)节的(de)三针稳(wen)压器(qi)LM317L（IC1）。R1和(he)R2电阻将(jiang)IC1的(de)输出调(diao)节至稳(wen)定的(de)5V，可在“A”型母USB插(cha)座上使用。红色LED1指示输出状(zhuang)态，齐纳二极(ji)管ZD1用作高压保护(hu)器(qi)。

如电路(lu)图中(zhong)看到的，电路(lu)非常简(jian)单，只需要几个(ge)常见的元件(jian)。因(yin)为这个(ge)电路(lu)不需要很多元件(jian)，所(suo)以可(ke)以把所(suo)有(you)的元件(jian)都放在雪茄插头插座里。

车载usb充电器电路