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 10 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
Developing device
Analysis device and an analysis apparatus using the analysis device
Color variation control process for molding plastic and composite multi-color articles
Simplified algorithm for abnormal situation prevention in load following applications including plugged line diagnostics in a dynamic process
Container
Burner grate
DC/DC converter, power supply circuit, and semiconductor device
  Randomly Featured Patents
Process for the preparation of an azidosulphonylbenzoic acid
Positive resist composition containing 1,2-quinone diazide compound, alkali-soluble resin and polyhydroxy phenol additive compound
X-ray exposure apparatus with a digital filter for reducing image unsharpness
Transparent static dissipative formulations for coatings
Flexible diaphragm construction
Sheet handling device and method for transporting sheets
Use of agents which bind G proteins for treating septic shock
Optical disc, method and apparatus for recording signal thereon
All terrain vehicle
Protective goggles