公开(公告)号：US20190267988A1

公开(公告)日：2019-08-29

申请号：US16331860

申请日：2017-09-19

Applicant: Sengled Co., Ltd.

Inventor： Zhibin TIAN ,  Jinxiang SHEN

IPC: H03K17/284

Abstract: A switch-tube driver circuit is provided, comprising: a first field effect tube, a control element, a first time delay circuit, and a second time delay circuit. The first time delay circuit comprises: a first resistor and a first capacitor. The second time delay circuit comprises: a second resistor and a second capacitor. A gate electrode of the first field effect tube is connected to the signal input interface, a source electrode of the first field effect tube is connected to ground, and a drain electrode of the first field tube is connected to an end of the first transistor, an end of the first capacitor, and a first end of the control element, respectively. The other end of the first resistor accesses a bias voltage and is connected to an end of the second resistor, and the other end of the first capacitor is connected to ground.

公开(公告)号：US20190363641A1

公开(公告)日：2019-11-28

申请号：US16331795

申请日：2017-09-12

Applicant: Sengled Co., Ltd.

Inventor： Zhibin TIAN ,  Junshan LOU ,  Jinxiang SHEN

IPC: H02M7/217

Abstract: A rectifier circuit and a dimmer circuit are provided, comprising: an isolating driver circuit, a switching control circuit, a before-bridge damper circuit, and a rectifier bridge. The isolating driver circuit is connected to the before-bridge damper circuit via the switching control circuit, two ends of the switching control circuit are connected to two input ends of the rectifier bridge, respectively, and two ends of the before-bridge damper circuit are connected to the two input ends of the rectifier bridge, respectively. In the disclosed rectifier circuit and damper circuit, the isolating driver circuit receives the after-bridge control signal after the rectifier bridge, the switching control circuit controls connection or disconnection of the before-bridge damper circuit to the rectifier circuit based on the after-bridge control signal. Accordingly, the before-bridge damper circuit may be adjusted based on the after-bridge control signal, and flexibility in controlling and adjusting the rectifier bridge circuit is improved.