Chinese chipmaker TinyChip has introduced a dedicated anti-pinch detection chip, the TSP007, designed for automotive side doors, tailgates, and windows. The chip uses capacitive sensing to detect an obstacle before physical contact occurs, a shift from traditional current-based systems that only react after pressure builds. According to Chinese automotive outlet D1EV, the chip aims to solve long-standing safety and reliability issues in automated door systems.
Why Capacitive Sensing?
Modern vehicles increasingly feature powered side doors, electric suction doors, semi-hidden handles, and smart windows. But safety remains a top concern. Conventional anti-pinch systems rely on motor current or Hall sensors, which trigger only after an object is squeezed with 50N to 100N of force. That delayed response can be dangerous, especially for children's fingers, and can fail in rain or snow.
Capacitive sensing detects a person or object as it approaches the sealing strip, before actual compression, allowing the system to stop and reverse the door early. TinyChip's TSP007 integrates a high-sensitivity analog front-end (AFE) and a hardware water-blocking module with adaptive algorithms. The chip can distinguish between liquid water and a human body, reducing false triggers from rain, car wash water, or condensation—a common problem that either prevents doors from closing or disables the protection entirely.
Handling Harsh Conditions
Automotive environments are challenging: temperatures range from -40°C to 125°C, and electromagnetic noise from inverters, motors, and wireless devices can drown out the weak capacitive signals, which are in the picofarad range. TinyChip says the TSP007 uses proprietary multi-frequency harmonic detection and dynamic multi-frequency scanning to maintain stable operation despite these disturbances.
The chip integrates a high-voltage LDO and a LIN transceiver, allowing a single-chip solution that simplifies PCB design and cuts system BOM costs. It also supports OTA updates via LIN, reducing scrappage rates. Key specs include an ARM Cortex-M0 core at 48MHz, 64KB Flash with ECC, 5.5V-18V operating voltage, and five capacitive sensing channels. It meets AEC-Q100 Grade 1 requirements for automotive reliability.
The TSP007 is positioned as a domestic alternative for Chinese automakers and Tier 1 suppliers, helping them avoid the pitfalls of false or failed anti-pinch protection. As vehicles move from basic automation to more advanced safety features, dedicated chips like this could become standard in next-generation smart door systems.
