USB type-c interface water inlet detection device
CN224745110UActive Publication Date: 2026-09-11SHENZHEN KAIFA TECH
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Patent Information
- Application Number
- CN202521405074.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-04
- Publication Date
- 2026-09-11
- Estimated Expiration
- 2035-07-04
AI Technical Summary
Technical Problem
但一些电子设备可以放置器件的空间有限，或者更低成本考虑，无法使用进水检测芯片的方式
Benefits of technology
[0012]实施本实用新型提供的USB TYPE-C接口进水检测装置，由于不需要使用进水检测芯片，硬件上只需要增加几个普通器件组成检测电路，降低了硬件成本；同时不需要安排软件工作时不间断地扫描处理器的ADC端口，避免增加较多的额外功耗。利用本实用新型的装置，在几乎不增加电子设备硬件成本和运行功耗的前提下，仅用几微安的检测功耗，即可快速实现低成本低功耗的进水检测，尤其适用在健康穿戴设备这种对低功耗要求高的电子设备上。利用本实用新型的检测装置，可以有效检测VBUS 对地短路、VBUS 对 SBU 短路及混合短路三种场景，覆盖了进水或金属异物导致的主要短路类型，检测全面性较高。
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Abstract
A water ingress detection device for a USB Type-C interface used in electronic devices is disclosed. A lithium battery (300) powers an MCU microprocessor (200) via a DC-DC voltage converter (500). The device includes a detection network (100) connected to the VBUS port of the USB Type-C interface and a Schmitt-N gate flip-flop connected between the detection network and an interrupt port of the MCU microprocessor. The water ingress detection network includes a diode (D1), a first resistor (R1), a second resistor (R2), a capacitor (C1), and a third resistor (R3). Implementing this water ingress detection device requires only a few common components instead of a dedicated detection chip, eliminates the need for software scanning of the processor's ADC port, and consumes only a few microamps of power for water ingress detection, making it low-cost and particularly suitable for low-power, low-cost electronic devices.
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