In the wake of the automotive intelligence and lightweighting revolution, reverse and parking safety – core elements of active vehicle safety – have reached a critical juncture for technological iteration. For years, the market for automotive reverse radar core chips has been tightly monopolized by overseas giants such as Elmos, Bosch, and Onsemi, creating a high-barrier oligopoly. Domestic manufacturers, forced to rely on imports or low-end imitation chips, have found themselves constrained in technology, cost, and supply – a classic "choke point" for China's automotive electronics industry.
Mcms Consulting has learned that a historic breakthrough has recently been achieved in China's chip industry: the first truly mass-produced automotive reverse radar chip that integrates "direct drive technology and a high-precision temperature sensor," and adds multi-echo, multi-point STC (Sensitivity Time Control), and multi-point threshold design. This chip breaks foreign technological barriers, achieving a "0 to 1" leap in domestic substitution, and provides domestic automotive electronics manufacturers with an efficient, reliable, low-cost, and easy-to-use one-stop solution, redefining the core value of reverse and parking safety chips.
Direct Drive Design: Reduce Load, Increase Efficiency, Lower Cost, Improve Reliability – Breaking Imported Technology Constraints
As China's first mass-produced transformer-less reverse radar chip, this product completely shatters the foreign monopoly on "transformer-less integrated design." It abandons the traditional design limitation of domestic chips that rely on external transformers, highly integrating the drive module with the core chip and eliminating the need for external transformers and associated large capacitors.
The chip features a high-precision stepped ringing compensation circuit (Damping), which effectively controls the energy decay of the probe during ringing, achieving seamless adaptation to various probes. Tests show that when paired with mainstream probes, the detection blind spot is less than 20 cm, fully meeting the technical requirements of major automakers. Indie Micro enables customers to quickly complete customized development based on their product positioning.
Integrated High-Precision Temperature Sensor: Precise Compensation, Minimal Ranging Error – On Par with Top Global Standards
The ranging accuracy of reverse radar is highly susceptible to ambient temperature – the propagation speed of ultrasound has a clear linear relationship with temperature. In dry air, the relationship between sound speed (v, m/s) and Celsius temperature (T, °C) is v ≈ 331.4 + 0.607 × T. A temperature difference of 25°C leads to a sound speed deviation of about 15 m/s, corresponding to a ranging error of up to ±2.3 cm – beyond the safety threshold in reverse scenarios. The temperature sensors integrated into foreign chips lack precision (simple temperature-sensing diodes, ±6°C), resulting in poor compensation.
In contrast, this product innovatively integrates a high-precision temperature sensor on-chip, requiring no external auxiliary components. It collects real-time ambient temperature data with an accuracy of ±2°C, providing real-time temperature data to the ECU or domain controller for sound speed compensation, dynamically correcting ranging results. This ensures that ranging accuracy remains within ±1 cm across a wide temperature range of -40°C to 85°C, achieving "zero-error ranging over the full temperature range" and matching top international performance.
This design not only simplifies system structure and reduces R&D and assembly costs for manufacturers, but also ensures that the reverse radar system provides accurate distance feedback to drivers even in extreme cold or heat, completely avoiding parking collision risks caused by temperature errors and enhancing overall parking safety. Additionally, the temperature sensor can monitor the chip's own operating temperature in real time, enabling over-temperature protection, further improving chip lifespan and operational reliability – addressing the stability shortcomings of foreign chips in extreme environments.
New Core Advantages: Multi-Echo, Multi-STC, Multi-Threshold – Easier Configuration, Doubled R&D Efficiency
Compared to foreign chips, this product achieves further breakthroughs in core performance, adding three major advantages: "increased number of identifiable echoes, increased number of STC levels, and increased number of thresholds," solving the industry pain point of limited adaptability in traditional chips.
Echoes: The number of identifiable echoes is increased to five, allowing simultaneous capture of echo signals from multiple obstacles. It effectively filters out clutter interference, enabling better identification of the position and distance of each obstacle even in complex parking scenarios (e.g., multiple obstacles, narrow spaces), reducing missed or false detections and significantly improving safety.
STC and Thresholds: The chip greatly increases the number of STC (Sensitivity Time Control) and threshold settings, supporting flexible configuration across multiple levels and scenarios.
New Core Advantages: Compatible + Extended Command Modes – Seamless Replacement, Cost Reduction, Stable Operation, Error Prevention
The chip innovatively features dual command modes, balancing ease of replacement and command execution stability:
Compatible commands directly match existing imported product command sets, requiring no major modifications to existing systems, enabling rapid product replacement, shortening manufacturer upgrade cycles, and reducing R&D modification costs.
Extended commands optimize command design rationality, adding ECC (Error Correction Code) functionality to effectively resist signal interference in complex in-vehicle environments. This avoids false judgments caused by command interruption or tampering – a problem with existing imported products – further strengthening parking safety at the command level, making radar system operation more stable and judgments more accurate.
These upgrades free domestic manufacturers from dependence on foreign chip technology licensing, achieving true independent control over core technology, while balancing R&D efficiency and product safety, providing core support for manufacturers to build highly competitive products.
New Technology Enhancements: Optimized Detection Performance, Overtaking Foreign Counterparts in Short-to-Medium Range Ranging
A new ADC and filter circuit principle improves the signal-to-noise ratio from the technology foundation, further optimizing radar detection performance for more accurate and stable ranging data. At the same time, the product achieves a differentiated breakthrough in ranging capability: its short-to-medium range performance far exceeds that of foreign competitors. Not only does it expand the effective ranging coverage, but it also demonstrates excellent echo performance at different distances:
At 1m (short-to-medium range), higher echo amplitude and better SNR.
At 30cm (close range), ultra-high echo amplitude, making it particularly capable of detecting weak-reflection targets at close distances.
At 2m (long range) and 1.5m (medium range), stable detection performance.
This comprehensively covers the ranging needs of parking scenarios, solving the shortcomings of existing foreign chips in detecting weak-reflection targets at short and medium distances.
Automotive-Grade Mass Production Quality – Empowering Automotive Electronics Upgrade with a Chinese Chip
As China's first truly mass-produced automotive reverse radar chip that integrates high-voltage direct drive technology, a high-precision temperature sensor, multi-echo, multi-STC, multi-threshold, and a new ADC and filter circuit, the product strictly follows automotive electronics industry standards and has passed AEC-Q100 qualification. It features high anti-interference capability, high stability, and high reliability, adapting to various complex operating conditions in the automotive environment (high temperature, low temperature, vibration, electromagnetic interference, etc.), fully meeting the needs of passenger vehicles, commercial vehicles, and new energy vehicles.
Compared to foreign chips, this domestic product not only matches or even surpasses them in core performance but also offers absolute advantages in cost, adaptability, and ease of use. It completely breaks the foreign technology monopoly and pricing barriers, freeing domestic automotive electronics manufacturers from import dependence and enabling independent control over core components. It provides domestic manufacturers with differentiated product competitiveness, helping them shorten R&D cycles, reduce production costs, and improve product quality.
The breakthroughs and accumulation in core technology will also drive continuous technological upgrades in China's automotive electronics chip industry, providing mature technical paths and industrial experience for the subsequent development of Indie Micro's ultrasonic family (AK2, AK3, etc.) chips.
From breaking foreign technology monopolies to achieving mass production, from core performance breakthroughs to ease-of-use upgrades, every innovation in this Chinese automotive reverse radar chip focuses on the core needs of parking safety; every advantage is dedicated to creating greater value for China's automotive electronics industry. Choosing this domestic chip means not only choosing a high-performance core component but also choosing a reliable industry partner. In the future, we will work hand-in-hand with domestic automotive electronics manufacturers to jointly drive iterative upgrades in China's automotive parking safety technology, continuously break foreign technology monopolies, demonstrate the innovative power of Chinese chips, and create a safer, more convenient parking experience for millions of car owners – empowering the high-quality development of the automotive electronics industry with a Chinese chip.
About Indie Micro
Wuxi Indie Microelectronics Co., Ltd. is a leading domestic supplier of mixed-signal automotive-grade chip solutions. Founded in 2017, the company focuses on automotive-grade mixed-signal processing chips and solutions. In 2019, its first automotive-grade chip entered mass production and commercial use. Since then, its automotive-grade mixed-signal chips have been mass-produced and widely used in automotive lighting control and micro-motor control applications, entering the front-load supply chains of major automakers. The company has partnered with over 100 automotive Tier 1 suppliers worldwide, covering both traditional fuel vehicle and new energy vehicle brands, including first- and second-tier manufacturers. In addition to maintaining market and technological moats for its existing cash-generating products, the company aims to launch new growth drivers in emerging in-vehicle applications each year.
