发明授权
- 专利标题: Three-terminal, low voltage pulse width modulation controller IC
- 专利标题(中): 三端,低电压脉宽调制控制器IC
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申请号: US10099661申请日: 2002-03-14
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公开(公告)号: US06775164B2公开(公告)日: 2004-08-10
- 发明人: Chuck Wong , Paul W. Latham, II , Shawn Laliberte
- 申请人: Chuck Wong , Paul W. Latham, II , Shawn Laliberte
- 主分类号: H02M100
- IPC分类号: H02M100
摘要:
A three-terminal low-voltage PWM controller chip includes a first terminal for receiving operating bias current supply and a feedback control signal related to an output parameter of an electrical circuit to be controlled; a second terminal connected to an output switch providing digital width-modulated control pulses to control duty cycle of the electrical circuit; a third terminal ground connection; a clocked pulse width modulation circuit responsive to current flow between the second terminal and the third terminal and the feedback control value for controlling the digital output switch; and, feedback signal separation circuitry for separating the feedback control signal from the operating bias current supply. A start-up circuit is also provided.