STMicroelectronics TSC1641 digital power monitor

STMicroelectronics has introduced the TSC1641 precision digital current, voltage and power monitor with high-precision input channels and support for the MIPI I3C advanced bus interface.

The TSC1641 helps enhance energy use in industrial battery packs, power inverters, DC power supplies, data-centre and telecom equipment, and power tools, among other applications. The IC monitors DC current and DC voltage simultaneously through a dual-channel 16-bit analog-to-digital converter (ADC) and computes power internally. Synchronising the current and voltage measurements enables accurate power calculations.

With I2C and SMBus host communications, in addition to MIPI I3C, the device reports measurements and warns of excessively high or low current, voltage, power and temperature to prevent circuit damage. The IC also provides an alert pin to indicate warnings and saves external components by integrating the sensor for temperature monitoring.

With a voltage-measurement range up to 60 V, the power monitor can be used in a wide variety of industrial settings. Monitoring current with an external shunt resistor allows flexibility to perform high-side, low-side and bidirectional measurements. The device draws 50 nA in shutdown mode, for minimal impact on the overall system power consumption.

The MIPI I3C interface allows designers to connect the device directly to microcontrollers such as ST’s STM32H5 series, to assist system supervision. The interface supports data rates up to 12.5 MHz and requires no pull-up resistors, which saves board space.

The power monitor is specified over the temperature range from -40 to 125°C and is in production now.