Geneva—STMicroelectronics has unveiled a chip that simplifies the design of power management, monitoring and safety equipment by allowing direct and accurate measurement of current in power lines operating at up to 70V.
Dubbed TSC103, this chip is the latest in ST's family of high-side current-sense amplifiers, which simplify design by connecting directly to power-supply lines at high voltages. This approach requires only a small sensing resistor and consumes less power than the conventional solution. The TSC103 accepts a common-mode input from 2.9V up to 70V and measures current more accurately than similar competing devices. The common-mode input range can also be set from -2.1V to 65V in dual-supply configurations, with outstanding stability of the accuracy versus common-mode voltage. The output is proportional to the measured current and can be connected directly to the analog input of a microcontroller.
In addition to the TSC103, ST has also introduced the TSC1031, featuring enhanced EMI filtering to maintain performance in electrically noisy environments. Both devices have adjustable sensitivity that allows their use in diverse applications, such as 24V vehicle systems, 48V telecom equipment, multi-LED display backlights, or solid-state lighting. The devices are fully ESD specified for rugged performance and they can operate from -40°C to 125°C.
Pricing: $0.96 for sample quantities in industrial grade and $1.12 for automotive- grade devices. Alternative pricing options are available for larger quantities.
Availability: Now in industry-standard SO8 and miniature TSSOP8 packages.
Datasheet: Click here.