Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Offline AC-DC controller circuit and a converter comprising the same










Image Number 7 for United States Patent #8488337.

An offline AC-DC converter circuits including an overvoltage detection module, a current limiting module, a PWM module and a switch control module coupled to the above modules. The overvoltage detection module, the current limiting module and the PWM module share a common input terminal. The sampled current signal and the sampled voltage signal are provided at the common input terminal by way of time-division multiplexing. With the time-multiplexed terminal, overvoltage detection for the output voltage is performed during the period when the power transistor is cut off and a current through the power transistor is detected during the period when the power transistor conducts. The two signals are input by way of time-division multiplexing, which are not affected by each other. Accordingly, overvoltage in the output voltage can be precisely detected without additional terminals, and thus the overvoltage can be controlled.








 
 
  Recently Added Patents
DC/DC converter, power supply circuit, and semiconductor device
End-of-session authentication
Fabricated leaf tea products
Simulating non power of two texture behavior
Methods and systems for use in tracking targets for direction finding systems
Depth estimation apparatus and method
Closed cell culture system
  Randomly Featured Patents
Semiconductor acceleration sensor with cantilever
Method and device for securing an electronic instrument to a bracket
Applicator for semi-solid medications
Snack tray or the like
Electroluminescent silylated pyrenes, and devices made with such compounds
Gasoline composition
Suspended floorboard
Method and apparatus for displaying a plurality of graphic images
Retrofit light emitting diode tube
Binding tape reel having a tape cleaning tool