Current limit control with constant accuracy

US9507357B2 · kind B2 · utility

Assignee

• DIALOG SEMICONDUCTOR INC. · DE

Inventors

• Marcus Weis · Munich, DE
• Stephan Drebinger · Munich, DE
• Fabio Rigoni · Karlsfeld, DE

Key dates

• Filing date: May 14, 2014
• Grant date: Nov 29, 2016
• Expiry date: Jul 10, 2035

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02M1/0009
• WIPO field: Control
• WIPO sector: Instruments

Abstract

The present document relates to a current sensing and/or control circuit with reduced sensing errors. A current control circuit for controlling a load current into an electronic device is described. The current control circuit comprises an array of control transistors configured to adjust the load current provided at an output of the array of control transistors. The load current is drawn from a power supply at an input voltage. Furthermore, the power supply is coupled to an input of the array of control transistors. The circuit further comprises a reference transistor coupled to the power supply at an input of the reference transistor and a reference current source configured to draw a reference current at an output of the reference transistor.