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Patent Searching and Data


Title:
VEHICLE LAMP AND CONTROL CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2021/075474
Kind Code:
A1
Abstract:
An inverting switching regulator (120) has a switching transistor (M1), an inductor (L1), and a rectification element (D1). A light source (110) is connected between an output terminal (OUT) of the inverting switching regulator (120) and ground. A protection switch (SW1) is disposed between the output terminal (OUT) of the inverting switching regulator (120) and ground. A protection circuit (146) turns on the protection switch (SW1) and fixes the switching transistor (M1) to an off state when the voltage (VBAT) of an input terminal (IN) of the inverting switching regulator (120) has exceeded a threshold value (VTH).

Inventors:
ICHIKAWA TOMOYUKI (JP)
Application Number:
PCT/JP2020/038833
Publication Date:
April 22, 2021
Filing Date:
October 14, 2020
Export Citation:
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Assignee:
KOITO MFG CO LTD (JP)
International Classes:
H05B45/3725; B60Q1/00; H02M3/155
Attorney, Agent or Firm:
MORISHITA Sakaki (JP)
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