Method and apparatus for efficiently driving a low-voltage device from a wide-range input supply,申请号US20020141051-传众专利搜索

Method and apparatus for efficiently driving a low-voltage device from a wide-range input supply

申请公布号：US6667583(B2)

申请号：US20020141051

申请日期：2002.05.07

申请公布日期：2003.12.23

申请人：

SUPERTEX, INC.

发明人：KERENYI LADISLAS G.

分类号：H02M3/155;(IPC1-7):H05B37/02

主分类号：H02M3/155

摘要：A method an apparatus for efficiently driving a low-voltage device from a wide-range input supply uses and inductor and a diode coupled in parallel to provide a high-efficiency energy storage circuit. The parallel diode/inductor circuit is coupled to a switch for intermittently supplying a current to maintain a level of energy storage in the circuit. The switch is coupled to a control circuit for controlling the switch. The external device be a relay and the inductor may be a coil of the relay. The external device may be one or more LEDs connected in series and the diode may be the series LED circuit. The control circuit may include a fault-tolerant synchronization input for connection to multiple driver circuits, whereby audible noise produced by beat frequencies between the relays is eliminated.