Patent ID: 6724598
Filing Date: 2004-04-20
Classification: H02H

Abstract:
A temperature compensated current limit circuit comprising:a first resistive element having a first terminal and a second terminal, said first terminal adapted to receive an input voltage, said first resistive element having a temperature dependent resistivity; a second resistive element having a first terminal and a second terminal, said first terminal adapted to receive said input voltage; a load current controller having a first terminal in communication with said second terminal of said first resistive element, a second terminal in communication with a load, and a control terminal adapted to receive a control signal; a current module having a first terminal in communication with said second terminal of said second resistive element, said current module providing a temperature dependent current at said first terminal; and an amplifier having a first input terminal in communication with said second terminal of said first resistive element, a second input terminal in communication with said second terminal of said second resistive element, and an amplifier output terminal in communication with said control terminal of said load current controller, said amplifier providing said control signal at said amplifier output terminal in response to a load current, said resistivity of said first resistive element, said resistivity of said second resistive element and said temperature dependent current.