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开关电源随着对电子设备小型化、微耗化与轻量化要求的不断提高而得到广泛的应用。为解决开关电源控制电路制作和维护上的困难,国内新近采用厚膜等工艺,制成了主要用于推挽输出开关电源控制电路的模块化开关电源控制电路HK02。采用HK02为核心构成的开关电源控制电路具有外围元件少,焊点少,可靠性高等显著优点。 HK02以脉宽调制控制集成电路TL494(TL494内部结构如图1所示)为核心构成。HK02的内部结
Switching power supply with the miniaturization of electronic devices, micro-consumption and lightweight requirements continue to be widely used. To solve the switching power supply control circuit production and maintenance difficulties, the domestic newly adopted thick film technology, made mainly for push-pull output switching power supply control circuit modular switching power supply control circuit HK02. Using HK02 as the core of the switching power supply control circuit with fewer external components, less solder joints, high reliability and significant advantages. HK02 to pulse width modulation control integrated circuit TL494 (TL494 internal structure shown in Figure 1) as the core composition. HK02’s internal junction