TMCS1123 extends EZShunt portfolio to simplify current sensing
The latest addition to Texas Instruments’ current sensors portfolio is the TMCS1123 Hall-effect current sensor. It helps engineers simplify designs while improving accuracy, said the company.
Designed for a broad range of common-mode voltages and temperatures, the TMCS1123 series includes what is claimed to be a lowest-drift isolated Hall-effect current sensor for high voltage systems. There is also a portfolio of current shunt monitors that eliminate the need for an external shunt resistor for non-isolated voltage rails.
The TMCS1123 is also claimed to have the industry’s highest reinforced isolation and highest accuracy over lifetime and temperature. Its high accuracy and low propagation delay enables designers to use Hall-effect sensors in previously unrealisable high voltage systems, said the company, to reduce system cost and size.
The need for highly accurate current measurements in high-voltage systems such as electric vehicle chargers and solar inverters is growing, but Hall-effect current sensors have typically been overlooked given their high drift over lifetime. The TMCS1123 Hall-effect current sensor features the highest reinforced isolation working voltage of 1,100V DC. It also features a maximum sensitivity error of ±0.75 per cent with 50 ppm per degree C drift over temperature and ±0.5 per cent drift over lifetime. The TMCS1123 features low propagation delay of 600 nanoseconds and bandwidth of 250kHz, which enable faster control loops while keeping noise low to help increase system efficiency. The high precision and stability over lifetime remove the need to recalibrate equipment, reducing costly and time-consuming maintenance, added TI.
For non-isolated systems up to 85V and 75A RMS, TI also offers what is believed to be the industry’s smallest fully integrated current shunt monitor and the industry’s highest accuracy 75A integrated shunt solution.
TI’s EZShunt portfolio of current-sensing solutions simplifies designs by removing the need for an external shunt resistor. It provides a fully integrated current-sensing solution that fits within the footprint of a 1206 shunt resistor.
Pre-production quantities of the TMCS1123 Hall-effect current sensor are available now, in a 10.3 x 10.3mm, 10-pin small outline integrated circuit (SOIC) package. Designers can purchase the TMCS1123EVM evaluation module.
Higher bandwidth and automotive-qualified versions of the TMCS1123 are expected to be available in fourth quarter of 2023 and second quarter of 2024, respectively.
