Switched mode power supply responsive to current derived from voltage across energy transfer element input
First Claim
1. A power supply, comprising:
- an energy transfer element having an energy transfer element input and an energy transfer element output;
a power switch coupled between the energy transfer element input and a positive input supply rail; and
control circuitry coupled to the energy transfer element input and to the power switch, the control circuitry to switch the power switch in response to a current derived from the voltage at the energy transfer element input.
0 Assignments
0 Petitions
Accused Products
Abstract
A switched mode power supply having a regulated reflected voltage. In one embodiment, a switched mode power supply includes a power supply regulator coupled between a positive input supply rail of the power supply and a primary winding of an energy transfer element. The reflected voltage across the primary winding of the transfer element is related to the output voltage across a secondary winding of the energy transfer element according to the turns ratio of the energy transfer element. The power supply regulator is coupled to regulate the reflected voltage across the primary winding, thereby regulating the output voltage across secondary winding. In one embodiment, the reflected voltage across the primary winding is sensed through a current representative of the reflected voltage received by the power supply regulator.
88 Citations
12 Claims
-
1. A power supply, comprising:
-
an energy transfer element having an energy transfer element input and an energy transfer element output;
a power switch coupled between the energy transfer element input and a positive input supply rail; and
control circuitry coupled to the energy transfer element input and to the power switch, the control circuitry to switch the power switch in response to a current derived from the voltage at the energy transfer element input. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
Specification