ST digital current and power monitors transmit significant information about a power unit to a microcontroller in short time. Using a shunt resistor and a connection to the load supply, parameters such as current, voltage, power, temperature, and alerts are sent to the controller.
Communication with the microcontroller can be performed via I2C or the new MIPI I3C standard implemented in latest generation microcontrollers, such as STM32H5 series MCUs.
ST digital current and power monitors allow measuring and analyzing energy consumption in industrial buildings or factories to help identify opportunities for optimizing energy use. The combination of current/voltage monitoring and embedded temperature helps ensure efficient and reliable operation in areas where environmental control is mandatory, such as data centers.
Digital power monitoring is also ideal for optimizing energy production in renewable energy systems.
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Product types:
Packaged in small 3x3mm footprints (DFN10 or MiniSO-8), these current and power monitors feature ultralow input bias and shutdown currents to sense current in shunt resistors and voltages up to 60 V.
With integrated high-resolution ADCs up to 16 bits, the devices implement low-side current topology with the TSC1214 or low-side and high-side current topologies with the TSC1641. Both devices allow bidirectional current monitoring.
An ALERT pin or signal for voltage, current, power and temperature can be asserted, with internal registers used to set the low and high alert thresholds.
New MIPI I3C interface up to 12.5 MHz is used to communicate with I3C controllers like the new STM32H5 series for the TSC1641, while the TSC1214 supports standard I2C communication up to 400 kHz.
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Benefits
- Small footprint
- Wide range of possible alerts
- New MIPI I3C communication
- Reduced pin count
- High speed 12.5 MHz single data rate (SDR)
- Common command codes
- Direct or broadcast commands
- Dynamic addressing (static address not needed)
- STM32H5 interface
- Combines advantages of I2C and SPI
- Backward compatibility with I2C
- In-band interrupts (IBI)
- I3C I/Os combine open drain and push-pull
