減(jian)小內部干擾，實現其(qi)自(zi)身(shen)電磁(ci)兼容性(xing)(xing)(xing)，提高開關電源穩定性(xing)(xing)(xing)及(ji)可靠性(xing)(xing)(xing)，應從以下幾個(ge)方面入手(shou)

注(zhu)意數(shu)字電(dian)(dian)(dian)路(lu)(lu)(lu)(lu)與(yu)模擬(ni)電(dian)(dian)(dian)路(lu)(lu)(lu)(lu)PCB布(bu)線(xian)正確分區、數(shu)字電(dian)(dian)(dian)路(lu)(lu)(lu)(lu)與(yu)模擬(ni)電(dian)(dian)(dian)路(lu)(lu)(lu)(lu)電(dian)(dian)(dian)源正確去耦(ou)；注(zhu)意數(shu)字電(dian)(dian)(dian)路(lu)(lu)(lu)(lu)與(yu)模擬(ni)電(dian)(dian)(dian)路(lu)(lu)(lu)(lu)單(dan)點(dian)接、大(da)電(dian)(dian)(dian)流(liu)電(dian)(dian)(dian)路(lu)(lu)(lu)(lu)與(yu)小電(dian)(dian)(dian)流(liu)特別是(shi)(shi)電(dian)(dian)(dian)流(liu)電(dian)(dian)(dian)壓(ya)(ya)取樣電(dian)(dian)(dian)路(lu)(lu)(lu)(lu)單(dan)點(dian)接以(yi)減(jian)(jian)小共阻(zu)干擾(rao)、減(jian)(jian)小環(huan)影響(xiang)；布(bu)線(xian)時注(zhu)意相鄰線(xian)間間距及信號性(xing)質，避免產生串(chuan)擾(rao)；減(jian)(jian)小線(xian)阻(zu)抗；減(jian)(jian)小高壓(ya)(ya)大(da)電(dian)(dian)(dian)流(liu)電(dian)(dian)(dian)路(lu)(lu)(lu)(lu)特別是(shi)(shi)變(bian)壓(ya)(ya)器原邊與(yu)開關管、電(dian)(dian)(dian)源濾(lv)波(bo)(bo)電(dian)(dian)(dian)容電(dian)(dian)(dian)路(lu)(lu)(lu)(lu)所(suo)包圍(wei)面積；減(jian)(jian)小輸出(chu)整流(liu)電(dian)(dian)(dian)路(lu)(lu)(lu)(lu)及續流(liu)二極管電(dian)(dian)(dian)路(lu)(lu)(lu)(lu)與(yu)直流(liu)濾(lv)波(bo)(bo)電(dian)(dian)(dian)路(lu)(lu)(lu)(lu)所(suo)包圍(wei)面積；減(jian)(jian)小變(bian)壓(ya)(ya)器漏電(dian)(dian)(dian)感、濾(lv)波(bo)(bo)電(dian)(dian)(dian)感分布(bu)電(dian)(dian)(dian)容；采(cai)用諧振(zhen)頻率高濾(lv)波(bo)(bo)電(dian)(dian)(dian)容器等。

　　　 MCU與液晶顯(xian)示器(qi)(qi)數(shu)據線(xian)、址(zhi)線(xian)工作(zuo)頻率較高，是產生輻射主要(yao)干(gan)(gan)擾源(yuan)；小信(xin)號電(dian)路是抗(kang)(kang)外界(jie)干(gan)(gan)擾最薄(bo)弱(ruo)環節(jie)，適(shi)當增加高抗(kang)(kang)干(gan)(gan)擾能力(li)TVS及(ji)高頻電(dian)容、鐵氧(yang)體磁(ci)珠等元(yuan)器(qi)(qi)件，以提(ti)高小信(xin)號電(dian)路抗(kang)(kang)干(gan)(gan)擾能力(li)；與機殼距離(li)較近小信(xin)號電(dian)路，應加適(shi)當絕緣(yuan)耐(nai)壓處理等。功率器(qi)(qi)件散熱(re)器(qi)(qi)、主變(bian)壓器(qi)(qi)電(dian)磁(ci)屏蔽(bi)(bi)層要(yao)適(shi)當接，綜合考慮各(ge)(ge)種(zhong)接措施，有(you)助于提(ti)高整機電(dian)磁(ci)兼容性。各(ge)(ge)控制(zhi)單元(yuan)間大面(mian)積接用接板(ban)屏蔽(bi)(bi)，可以改善電(dian)源(yuan)適(shi)配器(qi)(qi)內部工作(zuo)穩定性。

　　　整流器機架上，要考(kao)慮(lv)各整流器間(jian)電(dian)(dian)(dian)磁(ci)耦合、整機線(xian)布置(zhi)、交流輸入中(zhong)線(xian)、線(xian)及直流線(xian)、防雷線(xian)間(jian)正確關系、電(dian)(dian)(dian)磁(ci)兼容(rong)量級正確分配等。以上這些都是減少電(dian)(dian)(dian)源適配器內部干擾，提高其(qi)自身電(dian)(dian)(dian)磁(ci)兼容(rong)性的方(fang)法(fa)。