Technological progress is sure to supply the necessary components.Moore's law, which holds that the processing power of a single computer chip roughly doubles every 18 months, applies to sensors, too.
In this paper, by the use of dual-current control mode and intelligent UC3842 chip as the core, a single-chip switching powersupply circuit are presented.
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。
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The single-chip switching mode powersupply based on TOP221Y device is introduced in the paper. The performance characteristic and operation principle is analyzed.