Patent ID: 6172885
Filing Date: 2001-01-09
Classification: H02M,Y02B

Abstract:
A switched-mode power supply, comprising:at least one power factor controller having a power regulating configuration for regulating a sinusoidal mains current consumption, said power regulating configuration having output terminals,a power switch disposed in parallel with said output terminals of said power regulating configuration and driven by drive pulses,a subtraction configuration with an output,a first input and a second input, anda pulse-width modulator with an input connected to said output of said subtraction configuration and an output connected to said power switch and outputting the drive pulses to said power switch,a rectifier configuration connected to said power regulating configuration,two input connections at which a mains voltage can be input into said at least one power factor controller, andtwo output terminals at which a bus voltage can be tapped off and being concurrently output terminals of said rectifier configuration,said power regulating configuration forming an internally produced current signal that is applied to said first input of said subtraction configuration and a control signal that is applied to said second input of said subtraction configuration;a switched-mode regulator connected to said output terminals of said rectifier configuration and having regulator output terminals at which an output voltage can be tapped off;a load connected downstream of said switched-mode regulator and disposed between said regulator output terminals;a first measurement configuration having an output outputting a first regulating signal dependent on the bus voltage;a feed forward control having a first feedback path with an integrator configuration for feeding back the first regulating signal to said power regulating configuration;a second feedback path having an output; anda second measurement configuration connected to said regulator output terminals and if a power consumption of said load changes, said second measurement configuration produces a second regulating signal which can be input into said power regulating configuration via said second feedback path.