本文使用双电流控制模式，以智能芯片uc 3842为核心，设计了单片开关电源的实用电路。
In this paper, by the use of dual-current control mode and intelligent UC3842 chip as the core, a single-chip switching power supply circuit are presented.
电感电流断续工作的反激式变换器一次侧开关可工作于硬开关或准谐振(或谷值开关或零电压开关)模式。
The flyback converter running in discontinuous conduction mode can be operated in hard switching or quasi resonant (or valley switching, or ZVS) mode regarding the primary side switch.
根据电感上电流的断续情况，开关变换器可以工作在连续导电模式（CCM）和断续导电模式（DCM）。
The switch convertor can work in continuous current mode(CCM) or discontinuous current mode(DCM) according to the current through the inductance.
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