Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Patent
1992-02-07
1993-09-14
Beha, Jr., William H.
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
307362, 323284, H02M 3335
Patent
active
052455262
ABSTRACT:
An embodiment of the present invention is a switching power supply with high voltage positive and negative power inputs, a system ground, a sensing resistor placed between the negative power input and system ground, first and second load outputs with the first load output connected to the positive power input, and a comparator having first and second comparison inputs and a comparison output with the second comparison input connected to the system ground. A constant-current source is connected to the first comparison input of the comparator. A power MOSFET switch transistor has its drain connected to the second load output, its source connected to the system ground, and its gate controlled by the comparison output of the comparator. And a control resistor is connected between the second power input and said first comparison input of the comparator. The constant-current source, control resistor, and sensing resistor are such that when a predetermined current flowing through the first and second load outputs reaches a predetermined level (the current limit), the voltage developed across the sensing resistor will be equal to the voltage dropped across the control resistor, and the comparator will turn off the transistor to prevent further current increases.
REFERENCES:
patent: 4533863 (1985-08-01), Luhn et al.
patent: 4764856 (1988-08-01), Rausch
patent: 5057765 (1991-10-01), Clark et al.
Balakrishnan Balu
Keller Richard A.
Lund Leif O.
Beha Jr. William H.
Power Integrations, Inc.
Schatzel Thomas E.
LandOfFree
Below ground current sensing with current input to control thres does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Below ground current sensing with current input to control thres, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Below ground current sensing with current input to control thres will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2032449