TI Unveils Advanced Current Sensors & Shunt Solutions
August 23, 2023 - Texas Instruments (TI) has proudly introduced a range of innovative current sensors, engineered to empower designers with simplified solutions and heightened accuracy. These groundbreaking products cater to wide common-mode voltage and temperature ranges, including isolated Hall effect current sensors for high-voltage systems and a series of current monitoring solutions eliminating the need for external shunt resistors on non-isolated voltage rails.
The new TMCS1123 Hall effect current sensor shines with unparalleled enhanced isolation and precision across its operational life and temperature spectrum. It offers the potential to simplify high-voltage system designs while delivering outstanding accuracy. Notably, Texas Instruments introduces the EZShunt™ product line, encompassing compact, fully-integrated current monitoring solutions and an industry-leading 75A integrated shunt solution tailored to non-isolated systems, supporting up to 85V and 75ARMS. For further insights,
Jason Cole, Business Division Manager at Texas Instruments, explains, "Design engineers often grapple with four crucial factors when selecting current sensing solutions: cost, size, accuracy, and speed. Our latest offerings underscore how our diverse sensing technologies effectively address design challenges across various systems. The TMCS1123, for instance, stands out with high precision and low propagation delay. This empowers designers to seamlessly integrate Hall effect sensors into high-voltage systems, a feat previously unattainable. This results in substantial reductions in system costs and footprint."
Accurate current measurement is increasingly vital in high-voltage systems, including electric vehicle charging and photovoltaic inverters. However, conventional Hall effect current sensors tend to be overlooked due to their significant drift over a product's lifespan. The TMCS1123 Hall effect current sensor boasts an enhanced isolation operating voltage of 1,100VDC, with a maximum sensitivity error of ±0.75%, a drift of 50ppm/°C across the temperature range, and a lifecycle drift of ±0.5%. With the remarkable precision of TMCS1123, designers can optimize system performance while simplifying designs. The device maintains exceptional accuracy and stability throughout its lifespan, eliminating the need for costly recalibrations.
In addition, precise power conversion control is pivotal for optimizing efficiency and ensuring protection. The TMCS1123 offers a low propagation delay of 600ns and a bandwidth of 250kHz. This empowers faster control loops while maintaining minimal noise, thereby significantly boosting system efficiency.
Texas Instruments' new EZShunt current sensing solution lineup redefines simplicity by eliminating the necessity for external shunt resistors. This series provides an all-inclusive current sensing solution neatly packaged within a 1206 shunt resistor housing, delivering the value of discrete solutions through a single chip.
The EZShunt series is marked by its cost-effectiveness and high precision, with drift as low as 25ppm/°C, and is available in various packages and shunt resistor values. INA700, a compact integrated current monitoring solution, empowers engineers to reduce the size of current sensing solutions by up to 84%. The lineup also boasts INA781, a high-precision 75A integrated shunt solution engineered to support common-mode voltages of up to 85V.
