Configurable electronic fuse device for load switches, electronic fuse mounting method, and electronic fuse system
The integrated protection scheme for electronic fuses addresses precision and configurability issues by using high-bandwidth analog solutions with configurable fuse curve shaping, ensuring precise and robust electrical protection for components.
JP2026056551APending Publication Date: 2026-04-01RENESAS ELECTRONICS CORP
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Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-07-17
- Publication Date
- 2026-04-01
AI Technical Summary
Technical Problem
Conventional I2t protection schemes for electronic fuses (eFUSEs) lack precision due to fixed fuse points in lookup tables and limited configurability in equation-based approaches, leading to quantization errors and unintended switch trips.
Method used
An integrated protection scheme using high-bandwidth analog solutions with multiple threshold levels and configurable fuse curve shaping, managing OC and I2t protections separately to handle non-overlapping regions, allowing for precise current and thermal protection.
Benefits of technology
Ensures robust electrical protection of components like wire harnesses, connectors, and PCB traces while suppressing unintended switch trips, maximizing energizing capacity and protecting the device itself.
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Figure 2026056551000001_ABST
Abstract
We provide electronic fuses that ensure reliable electrical protection. [Solution] An apparatus including an electronic fuse is disclosed. The electronic fuse profile of the electronic fuse can be generated by the apparatus's circuit. The circuit can set a DC threshold level for a first region of the electronic fuse profile based at least in part on a first user-adjustable parameter, a current threshold level for a third region of the electronic fuse profile based at least in part on a third user-adjustable parameter, and an integral time constant for a second region of the electronic fuse profile based at least in part on a second user-adjustable parameter. The second region can connect the first region in the electronic fuse profile to the third region.
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