Charger circuit and PWM controller thereof

专利名称：Charger circuit and PWM controller thereof发明人：Shu-Zhuang Lu,Tao Peng申请号：US11648806申请日：20070103公开号：US07583061B2公开日：20090901

专利附图：

摘要：A PWM controller includes a short circuit mode circuit which has input endsconnecting simultaneously to a power supply input end and an output end of an outputdriving circuit, and an oscillator which has a temperature compensation circuit thatincludes a medium value multi-transistor resistor of a negative temperature coefficient

and a well resistor of a positive temperature coefficient. The invention also provides acharger circuit which includes the PWM controller set forth above and a constantvoltage/current control circuit coupling with the PWM controller through a transformer.A system adopting the PWM controller circuit and charger circuit of the invention doesnot need a voltage stabilization diode now equipped in many conventional designs. Theinvention provides an improved short circuit protection and eliminates low frequencyharmonic waves.

申请人：Shu-Zhuang Lu,Tao Peng

地址：Shanghai CN,Shanghai CN

国籍：CN,CN

代理机构：Muncy, Geissler, Olds & Lowe, PLLC

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