Introduction:
Texas Instruments has recently launched a range of new current sensors designed to help engineers simplify their designs and enhance accuracy. These new products are specifically designed to operate in wide common-mode voltage and temperature ranges. They include lower-drift isolated Hall-effect current sensors for high-voltage systems and current shunt monitors that eliminate the need for external shunt resistors in non-isolated voltage rails.
Enhanced Isolation and High Accuracy with TMCS1123 Hall-Effect Current Sensor:
The new TMCS1123 Hall-effect current sensor offers industry-leading enhanced isolation and high accuracy throughout its lifecycle and temperature range. It simplifies the design of high-voltage systems while providing excellent precision. TI's new EZShunt™ product line includes compact fully-integrated current shunt monitors and highly accurate 75A integrated shunt solutions for non-isolated systems up to 85V and 75ARMS.
Jason Cole, Business Manager at Texas Instruments, stated, "When selecting current sensing solutions, design engineers need to balance four key factors: cost, size, accuracy, and speed. These new products highlight how our diverse sensing technologies can help various systems better address design challenges. For example, the TMCS1123 offers high precision and low propagation delay. With this device, designers can now use Hall-effect sensors in high-voltage systems, which was previously not possible, greatly reducing system costs and size."
Achieving Fast and Accurate Control in High-Voltage Systems with Hall-Effect Current Sensors:
Highly accurate current measurement is increasingly essential in high-voltage systems like electric vehicle chargers and photovoltaic inverters. However, the high drift of Hall-effect current sensors throughout their lifecycle often leads to their neglect. The TMCS1123 Hall-effect current sensor features an enhanced isolation operating voltage of 1,100VDC, a maximum sensitivity error of ±0.75%, a drift of 50ppm/°C over the temperature range, and a drift of ±0.5% throughout its lifecycle. With the high accuracy of the TMCS1123, design engineers can simplify their designs while optimizing system performance. The device offers high precision and exceptional stability throughout its lifecycle, eliminating the need for costly and time-consuming recalibration.
Additionally, precise control of power conversion is crucial for optimizing system efficiency and protection. The TMCS1123 provides a low propagation delay of 600ns and a bandwidth of 250kHz, enabling faster control loops while maintaining low noise, thus improving system efficiency.
Simplified Design and Size Reduction with EZShunt Technology:
TI's new EZShunt current sensing solutions eliminate the need for external shunt resistors, simplifying the design process. This product line offers a fully-integrated current sensing solution that fits within a 1206 shunt resistor package, providing the value of a discrete solution in a single chip.
The EZShunt product line features high cost-effectiveness and accuracy, with drift as low as 25ppm/°C and various package options and shunt resistor values. The INA700 is a compact integrated current shunt monitor that allows engineers to reduce the size of their current sensing solution by up to 84%. The product line also includes the INA781, a highly accurate 75A integrated shunt solution that supports a common-mode voltage of up to 85V.
Conclusion:
Texas Instruments is committed to helping engineers perceive the world more accurately, and these newHall-effect and EZShunt current sensing solutions are a testament to that commitment. These innovative products provide engineers with enhanced accuracy, simplified design, and improved efficiency in their current sensing applications. With the TMCS1123 Hall-effect current sensor, high-voltage systems can now benefit from the precision and low propagation delay previously only available in lower voltage applications. This not only reduces system costs but also saves valuable board space.
The EZShunt product line offers a fully-integrated solution that eliminates the need for external shunt resistors, further streamlining the design process. Engineers can now achieve the value of a discrete solution in a single chip, making it easier and more cost-effective to implement current sensing in their designs. The high accuracy and low drift of the EZShunt products ensure reliable and stable measurements throughout the lifetime of the system.
Overall, Texas Instruments' new current sensing solutions provide engineers with the tools they need to create more precise and efficient systems. By integrating advanced technologies and addressing key design challenges, TI continues to empower engineers to push the boundaries of what is possible in current sensing applications.
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