Patent ID: 8063581
Filing Date: 2011-11-22
Classification: H05B

Abstract:
1. A drive circuit for driving a load, the circuit comprising: (i) an output for connecting the load; (ii) a power supply for supplying an output current at the output (IL); (iii) a current sensor for generating a current sense signal (V (iv) a supply controller for controlling the power supply, the supply controller having a current sense input for receiving the current sense signal (V (v) a reference source for generating a reference value (VREF-NOM); wherein the supply controller has a reference input for receiving the reference value (VREF-NOM), the supply controller being configured to compare the received current sense signal (V (vi) a controllable switch in series with the output; (vii) a mode controller for controlling the controllable switch, the mode controller having a current sense input for receiving the current sense signal (V