Switching power supply

Details Switching power supply Switching power supply

H - Electricity

02

M

323/11, 321/27

H02M 3/22 (2006.01) H02M 3/335 (2006.01) H02M 1/00 (2006.01)

Patent

CA 1082772

SWITCHING POWER SUPPLY Abstract of the Disclosure A preregulator power supply having drive and control cir- cuits which are isolated or floating alternately from the input and output leads to permit direct coupling to the power switch- ing regulator device without requiring isolation devices such as transformers or optical isolators. This is achieved by an added series winding on the output choke, the common junction of which is connected to the output of the switching regulator and also forms the return lead for the floating drive and control circuits, while the added winding provides a sample output voltage for comparison by the floating drive and control cir- cuits to control the width of pulses fed to the switching regulator device. A free-wheeling diode is also connected from the output of the switching regulator to an output ter- minal to maintain current in the choke during the OFF cycle of the switching regulator and provide several isolated regu- lated voltages in windings magnetically coupled to the choke.

280078

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