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1. 发明公开

KR1020040103332A 차동 부하 구동 회로 无效
标题翻译：用于减少纹波电流的差分负载驱动电路
公开(公告)号：KR1020040103332A
公开(公告)日：2004-12-08
申请号：KR1020040037700
申请日：2004-05-27
申请人： 오투 마이크로, 인코포레이티드
发明人： 푸트센웡 , 하이준핼리첸 , 밍판리
IPC分类号： H03K17/687
CPC分类号： H02M7/53871 , F25B2321/0212 , H02M2001/0032 , H02M2001/0045 , Y02B70/16
摘要： PURPOSE: A differential load driving circuit is provided, which allows to supply a linear current at a low current mode and a PWM(Pulse Width Modulation) current at a high current mode, thereby reducing a ripple current. CONSTITUTION: A differential load driving circuit includes a plurality of power switches(64,66), a plurality of power switch driving circuits(52,54,56,58), and at least one current source(60,62). The power switches are selectively connected to a load to supply current to the load. The power switch driving circuits operates to control a conduction state of the power switches and to selectively connect at least one of the plurality of the power switches to a PWM(Pulse Width Modulation) signal. The current source is connected to the load to supply a current to the load during a low current condition of the load, and the PWM signal is connected to the load to supply a current to the load during a high current condition of the load.
摘要翻译：目的：提供一种差分负载驱动电路，可以在高电流模式下以低电流模式提供线性电流和PWM（脉宽调制）电流，从而降低纹波电流。构成：差分负载驱动电路包括多个电源开关（64,66），多个电源开关驱动电路（52,54,56,58）和至少一个电流源（60,62）。电源开关选择性地连接到负载以向负载提供电流。电源开关驱动电路用于控制电源开关的导通状态并选择性地将多个功率开关中的至少一个连接到PWM（脉宽调制）信号。电流源连接到负载，以在负载的低电流状态下向负载提供电流，并且PWM信号连接到负载以在负载的高电流状态期间向负载提供电流。

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