首页>
外国专利>
SWITCHING MODE POWER SUPPLIES WITH PRIMARY SIDE REGULATION AND ASSOCIATED METHODS OF CONTROL
SWITCHING MODE POWER SUPPLIES WITH PRIMARY SIDE REGULATION AND ASSOCIATED METHODS OF CONTROL
展开▼
机译:具有主侧调节功能的开关模式电源及其控制方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
A switching mode power supply (SMPS) includes a transformer having a primary winding, a secondary winding for providing an output voltage and an auxiliary winding, a primary switch coupled to the primary winding, a secondary rectifying diode coupled to the secondary winding and a secondary switch connected in parallel with the secondary rectifying diode. A control method used in the SMPS includes: comparing a voltage across the secondary switch with a first secondary threshold and a second secondary threshold and generating a hysteresis comparison signal; timing based on the hysteresis comparison signal; comparing the voltage across the secondary switch with a third secondary threshold when the timing period reaches a first predetermined time; turning ON the secondary switch when the voltage across the secondary switch is less than a third secondary threshold; and turning on the primary switch when the conduction of the secondary switch is detected.
展开▼