Runshi Technology has launched the RSA240 series high-voltage integrated current detection chip, which breaks through the voltage limitations of traditional solutions and supports a wide common mode input range of -5V to 100V, with a working voltage coverage of 2.7V-5.5V. This chip is designed specifically for monitoring 24V/48V industrial busbar systems and multiple battery packs. Through three core technological innovations, it achieves precise collection of microampere level currents in high-voltage environments, providing domestically produced high reliability solutions for fields such as new energy and industrial automation.
Central role
In scenarios such as battery management systems (BMS), servo drives, and photovoltaic inverters, RSA240 reconstructs the current detection link through three core capabilities:
● Safety barrier: Built in 100V voltage tolerance protection, replacing external discrete protection circuits
● Signal purity: 150dB common mode rejection ratio eliminates ground interference
● Direct replacement: compatible with TI INA240 pins, supports rapid localization replacement
Key competitiveness of the product
● Precision benchmark: 0.1% gain error at room temperature leading industrial grade chips
● Dynamic response: Achieving μ s level fault detection with a gain bandwidth of 500kHz
● Power consumption optimization: 1.55mA operating current is 40% lower than competitors
● Load capacity: 1nF capacitive load driven without external buffer
Actual application scenarios
● Electric tool battery pack: supports direct monitoring of 16 series lithium batteries (67.2V)
Industrial motor control: Real time feedback of 48V servo drive current loop
Communication power supply: leakage current detection of the 48V bus of the base station
Photovoltaic Optimizer: Milliohm Sampling Resistance Signal Amplification in MPPT Circuits
Product supply situation
● Packaging options: SOP8/TSSOP8 dual packaging compatible with mainstream designs
● Mass production progress: Achieving a monthly production capacity of millions by Q4 2023
Sample application: The official website provides free sample and evaluation board applications
● Delivery guarantee: Domestic warehouses regularly stock up, with a delivery time of ≤ 6 weeks
Conclusion
The launch of RSA240 marks the official entry of domestic current detection chips into the field of high voltage and high precision. Its combination performance of 100V common mode withstand voltage and 150dB CMRR solves the problem of sampling distortion in industrial equipment in complex electromagnetic environments. With the upgrade of the voltage platform for new energy equipment, this chip is expected to achieve a breakthrough in domestic substitution in billion dollar markets such as BMS and photovoltaic charging.
