Back to results
US 7,583,120 B2Granted
Power supply controller and method therefor
AssigneeSemiconductor Components Industries, LLC
InventorBenjamin M. Rice
Life of this patent
Estimating the term…
Abstract
In one embodiment, an error amplifier of a power supply controller is configured to receive a current sense signal prior to the current sense signal undergoing amplification.
Claims19
A power supply controller comprising:
- a control circuit configured to form a control signal to control a power control element to supply a load current to a load and to regulate an output voltage of a power supply system;
- an error amplifier coupled to receive a current sense signal that is formed by a current sense element in order to sense a value of the load current wherein the current sense signal is referenced to a bias signal formed at a first side of the current sense element, the error amplifier configured to receive the bias signal;
- and
- a difference amplifier coupled to amplify the bias signal and configured to sum an output of the difference amplifier with the current sense signal at an input of the error amplifier.
1 more element
A method of forming a power supply controller comprising:
- configuring the power supply controller to form a drive signal to control a power transistor to supply a load current to a load to regulate an output voltage of a power supply system;
- and
- configuring an error amplifier of the power supply controller to receive a current sense signal that is representative of the load current wherein the current sense signal that is referenced to a bias signal that is representative of a voltage of an output side of a current sense element that forms the current sense signal and wherein the error amplifier receives the current sense signal without the current sense signal first being amplified.
A method of forming a power supply controller comprising:
- configuring the power supply controller to form a drive signal to control a power transistor to supply a load current to a load to regulate an output voltage of a power supply system;
- and
- configuring an error amplifier of the power supply controller to receive a current sense signal that is representative of the load current wherein the current sense signal is referenced to a bias signal that is representative of an output potential of a current sense element used to form the current sense signal.
Dependencies are inferred from the claim text.