Precision digital power monitor has with MIPI I3C support
Support for the MIPI I3C advanced bus interface is an integral part of the design of the TSC1641 precision digital current, voltage and power monitor, announced by STMicroelectronics. MIPI I3C is a scalable, medium speed, utility and control bus interface for connecting peripherals to an application processor, which optimises energy use and reliability.
The MIPI I3C interface allows designers to connect the TSC1641 directly to state-of-the-art microcontrollers such as ST’s STM32H5 series, to assist system supervision. The interface supports data rates up to 12.5MHz and requires no pull-up resistors, which helps reduce the bill of materials and saves board space.
Combined with the TSC1641’s high precision input channels, this makes the monitor suitable for industrial battery packs, power inverters, DC power supplies, data centre and telecomms equipment and power tools. The IC monitors DC current and DC voltage simultaneously through a dual-channel 16-bit ADC (analogue to digital converter) and computes power internally. Synchronising the current and voltage measurements allows highly accurate power calculations.
It also has I2C and SMBus host communications, in addition to MIPI I3C, enabling the TSC1641 to report measurements and warn 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.
The voltage measurement range is up to 60V, for use in a wide variety of industrial settings, said ST. Monitoring current with an external shunt resistor allows flexibility to perform high side, low side, and bi-directional measurements. Drawing just 50nA in shutdown mode ensures minimal impact on the overall system power consumption, ST added.
The TSC1641 is specified over the temperature range from -40 to 125 degrees C and is in production now. It is available in a 3.0 x 3.0mm plastic DFN10 package.
The STEVAL-DIGAFEV1 evaluation board is available now for use with the TSC1641. The board can operate in standalone mode or can be connected to a NUCLEO-H503RB STM32 microcontroller development board. A graphical user interface (STSW-DIGAFEV1GUI) configures the TSC1641 and sample firmware (STSW-DIGAFEV1FW) is also available for the NUCLEO-H503RB and supports MIPI I3C communication.
