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(zhi)道，鎳(nie)鎳(nie)電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)充(chong)足電(dian)(dian)(dian)(dian)(dian)(dian)后，電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)兩端電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)不(bu)僅(jin)不(bu)再上升，還會出現(xian)下降趨(qu)勢(shi)。如果在充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)過程中測出其下降趨(qu)勢(shi)，便(bian)可保證電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)所需的(de)準(zhun)確充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)時間，實現(xian)大電(dian)(dian)(dian)(dian)(dian)(dian)流 快速充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)，延長電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)壽命。但多數電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)較復雜(za)，不(bu)易(yi)制作(zuo)(zuo)。平時所見(jian)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)多用電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)比較法(fa)，不(bu)易(yi)調準(zhun)，常產生(sheng)誤差(cha)。本電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)適(shi)用于所提要(yao)求，且可提供不(bu)同(tong)的(de) 充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流以適(shi)應不(bu)同(tong)的(de)需要(yao)，電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)簡單，制作(zuo)(zuo)容易(yi)。

    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)路中(zhong)，VD3為IC提供恒定電(dian)壓(ya)，可(ke)(ke)防(fang)止干擾。VDl、V4組成恒流(liu)電(dian)路，可(ke)(ke)防(fang)止誤動(dong)(dong)作且轉動(dong)(dong)開關(guan)S2,可(ke)(ke)獲得不(bu)同(tong)的(de)充(chong)(chong)電(dian)電(dian)流(liu)，按(an)圖 6?15所示(shi)，可(ke)(ke)分別獲得約50mA(R9擋(dang))、300mA(R8擋(dang))、1A(R10擋(dang))的(de)充(chong)(chong)電(dian)電(dian)流(liu)。電(dian)容(rong)Cl、電(dian)阻Rl為延時電(dian)路，它主要用以(yi)防(fang)止干擾 引起誤動(dong)(dong)作及可(ke)(ke)長時間不(bu)取出電(dian)池(chi)。若(ruo)C6放(fang)電(dian)過多，電(dian)路便重新啟(qi)動(dong)(dong)充(chong)(chong)電(dian)。S1為電(dian)源開關(guan)兼啟(qi)動(dong)(dong)開關(guan)。S3為微(wei)動(dong)(dong)開關(guan)，可(ke)(ke)消(xiao)除(chu)C6上電(dian)壓(ya)對(dui)下次(ci)充(chong)(chong)電(dian)的(de)影響。