CD4060是一種內部功能完善的集成塊，應用比較靈活。本文介紹一種巧妙利CD4060的一些特點設計出的快速充電器。
    大 家知道，鎳鎳電(dian)(dian)(dian)池充(chong)足電(dian)(dian)(dian)后(hou)，電(dian)(dian)(dian)池兩端電(dian)(dian)(dian)壓不(bu)(bu)(bu)僅(jin)不(bu)(bu)(bu)再上升，還會出現下降趨勢。如果在充(chong)電(dian)(dian)(dian)過程中測出其(qi)下降趨勢，便(bian)可保證(zheng)電(dian)(dian)(dian)池所(suo)需的(de)準(zhun)確(que)充(chong)電(dian)(dian)(dian)時間(jian)，實現大電(dian)(dian)(dian)流(liu) 快速(su)充(chong)電(dian)(dian)(dian)，延(yan)長電(dian)(dian)(dian)池壽命。但多(duo)數電(dian)(dian)(dian)路(lu)較(jiao)復雜，不(bu)(bu)(bu)易制作。平時所(suo)見充(chong)電(dian)(dian)(dian)器電(dian)(dian)(dian)路(lu)多(duo)用電(dian)(dian)(dian)壓比較(jiao)法(fa)，不(bu)(bu)(bu)易調(diao)準(zhun)，常產生(sheng)誤差。本電(dian)(dian)(dian)路(lu)適用于所(suo)提(ti)要求，且可提(ti)供(gong)不(bu)(bu)(bu)同(tong)的(de) 充(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)以適應不(bu)(bu)(bu)同(tong)的(de)需要，電(dian)(dian)(dian)路(lu)簡單，制作容易。

    電路如圖所示。ICl中的壓控振蕩器(VCO)受加在9腳上的電池電壓的控制， 其輸出信號一路送入IC2中的相位比較器14腳，與IC2中的VCO信號進行相位比較，比較結果控制IC2中的壓控振蕩器；另一路送入ICl中的相位比較器，與IC2來的VCO信號進行比較，其結果控制充電電路。充電時，電池電壓上升，使ICl中的VCO振蕩頻率上升。當13腳為低電平時，C6放電極其緩 慢。
電(dian)(dian)(dian)(dian)路中，VD3為IC提供恒(heng)定電(dian)(dian)(dian)(dian)壓，可(ke)防(fang)止干擾(rao)。VDl、V4組成恒(heng)流電(dian)(dian)(dian)(dian)路，可(ke)防(fang)止誤動(dong)(dong)作(zuo)且轉(zhuan)動(dong)(dong)開(kai)關(guan)S2,可(ke)獲得不(bu)同的(de)充電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流，按(an)圖 6?15所示，可(ke)分別獲得約50mA(R9擋)、300mA(R8擋)、1A(R10擋)的(de)充電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流。電(dian)(dian)(dian)(dian)容Cl、電(dian)(dian)(dian)(dian)阻Rl為延時電(dian)(dian)(dian)(dian)路，它主要用以防(fang)止干擾(rao) 引(yin)起誤動(dong)(dong)作(zuo)及可(ke)長時間不(bu)取出電(dian)(dian)(dian)(dian)池。若C6放電(dian)(dian)(dian)(dian)過多，電(dian)(dian)(dian)(dian)路便重新啟動(dong)(dong)充電(dian)(dian)(dian)(dian)。S1為電(dian)(dian)(dian)(dian)源開(kai)關(guan)兼啟動(dong)(dong)開(kai)關(guan)。S3為微動(dong)(dong)開(kai)關(guan)，可(ke)消除(chu)C6上電(dian)(dian)(dian)(dian)壓對(dui)下(xia)次(ci)充電(dian)(dian)(dian)(dian)的(de)影響。