Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent
1998-04-06
2000-01-04
Han, Y. J.
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
363 97, 323288, 315411, H02M 116, G05F 140, H01J 2970
Patent
active
060117060
ABSTRACT:
The power output of a static DC--DC converter employing a current mode PWM controller is controlled upon the varying of the switching frequency, by detecting the sawtooth signal produced by the local oscillator generating a DC signal with an amplitude inversely proportional to the frequency. The power output is controlled by alternatively clamping the output voltage of the error amplifier of the PWM controller at a voltage proportional to the amplitude of the DC signal, or by offsetting the signal present on the current sensing resistor by a voltage corresponding to the difference between a constant voltage and the DC signal.
REFERENCES:
patent: 5335162 (1994-08-01), Martin-Lopez et al.
patent: 5680036 (1997-10-01), Faulk
patent: 5804950 (1998-09-01), Hwang et al.
Adragna Claudio
Fagnani Mauro
Gattavari Giuseppe
Han Y. J.
SGS--Thomson Microelectronics S.r.l.
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