STMicroelectronics

The STEVAL-2STPD01 is an evaluation kit composed of an expansion board containing two Type-C ports and integrating two STPD01PUR programmable buck converters for USB Power Delivery, and the NUCLEO-G071RB STM32 Nucleo-64 development board. The kit exploits the characteristics of the STPD01PUR programmable buck regulator controlled through I²C interface, and the UCPD peripheral embedded in the STM32G071RBT6 microcontroller supported by a dedicated firmware stack to implement a USB Type-C and PD dual port source adapter with power sharing capability. Once the input power rate is fixed, the kit is able to balance the power on the two ports, supporting the requests sent by the USB PD devices connected to each port. Taking advantage of STPD01PUR characteristics to output several voltage levels, the solution is able to manage up to 120 W (60 W for each port) according to the DC input power. The expansion board has been specifically developed to be stacked on the NUCLEO-G071RB development board using the capability of its microcontroller to manage two UCPD peripherals at the same time. It also embeds the TCPP02-M18 USB Type-C port protection for Source applications and the L7983PU50R synchronous step-down switching regulator. To fully demonstrate the USB Type-C and Power Delivery functionalities of the solution, the STSW-2STP01 software package, containing the demo application example, has been designed for the NUCLEO-G071RB STM32 Nucleo development board. The solution is compliant with USB Type-C 2.1 and PD 3.1 specifications.

The STEVAL-A6983NV1 is an easy to use synchronous monolithic step-down regulator capable of delivering up to 3 A DC to the load. The wide input voltage range makes the device suitable for a broad range of applications. The STEVAL-A6983NV1 is based on a peak current mode architecture and is packaged in a QFN16 (3 x 3 mm) with internal compensation thus minimizing design complexity and size. The device is designed for applications active during car parking, so it maximizes the efficiency at the light-load with the controlled output voltage ripple. The STEVAL-A6983NV1 allows the switching frequency to be selected in the 200 kHz - 2.3 MHz range with optional spread spectrum for improved EMC. The EN pin provides enable/disable functionality. The typical shutdown current is 2 μA when disabled. As soon as the EN pin is pulled-up the device is enabled and the internal 1.3 ms soft-start takes place. The STEVAL-A6983NV1 features Power Good opencollector that monitors the FB voltage. Pulse by pulse current sensing on both power elements implements an effective constant current protection and thermal shutdown prevents thermal run-away.

The STEVAL-A6986IV1 evaluation board is based on ST A6986I automotive 38 V, 5 W synchronous iso-buck converter for isolated applications. The primary output voltage can be accurately adjusted, whereas the isolated secondary output is generated by a transformer. No optocoupler is required. The primary sink capability (typ. 1.9 A) allows a proper energy transfer to the secondary side and enables a tracked soft-start of the secondary output. The control loop is based on a peak current mode architecture and the device operates in forced PWM. The 300 ns blanking time filters oscillations generated by the transformer leakage inductance and makes the solution more robust. Pulse by pulse current sensing on both power elements implements an effective constant current protection on the primary side. Due to the primary reverse current limit, the secondary output is protected against short-circuit events. The secondary voltage is stabilized over current by using a power transistor and a shunt voltage reference (TL431). The evaluation board generates two isolated voltages (positive around 18 V and negative between 4 V and 5 V), especially suitable for supplying IGBT/SiC MOSFET gate driver. A simple bypass enables the supply of a single isolated voltage.

The STEVAL-A6986IV3 is an evaluation board based on ST A6986I. The A6986I is designed for isolated applications and normally implements an iso-buck architecture. The STEVAL-A6986IV3 board adopts an inverting buck-boost topology at the primary side (instead of a standard buck), hence building an isobuck-boost (so called from now on). The advantages in using the isobuck-boost instead of a buck are mainly: higher deliverable power at the secondary side, optimization of the transformer design. The input voltage is up to 28 V. Since the primary side performs an inverting buck-boost conversion, the primary output voltage is negative. The secondary side of the board consists of four independent windings, each one intended to provide the supply for a gate driver (see block diagram on page 2) thanks to a very accurate post regulation. The isobuck-boost architecture exploits the power capability of the A6986I, delivering up to 60 mA for three secondary channels and up to 180 mA for the fourth one. A microswitch provides the possibility to select two regulated voltage pairs for each channel: 18 V / - 5 V or 15 V / - 8 V. The regulation of these voltages is achieved by using the LDH40 (for the positive voltage) and a shunt regulator TL431B (for the negative voltage). The expanded output voltage range (up to 22 V) of the LDH40 makes it ideal for this kind of application. Thanks to the LDH40 and the TL431B, the described post regulation allows a voltage accuracy well below ±1%. The availability of four well-regulated dual voltages makes this solution ideal for gate driving in three-phase inverters.

The STEVAL-AETKT1V2 evaluation kit represents a bidirectional current sense amplifier with high side or low side sense resistor. The kit consists of a main board and individual daughter boards for the TSC2011, TSC2010 and TSC2012 high voltage, bidirectional, current sense amplifier ICs, which provide a a fixed gain of 60, 20 or 100, respectively. The thin film resistor on the TSC201x devices ensure extremely precise gain and very high common-mode rejection ratio (CMRR) performance, even in high frequency ranges. They accurately measure current by amplifying the voltage (VSENSE) across a shunt resistor connected to the input. Moreover, the ability to fix the output common mode voltage means that the device can be either used as unidirectional or bidirectional current sensing amplifier.

The STEVAL-AETKT2V1 evaluation kit implements bidirectional current sense amplifiers by placing a sense resistor either in the high-side or in the low-side. The STEVAL-AETKT2V1 kit consists of a motherboard and two different daughterboards for different gain configurations. The TSC21x family implements zero drift technology and is specially designed to accurately measure current by amplifying the voltage across a shunt resistor connected to its input. The voltage drop (Vsense) is then amplified by an amplifier. Thanks to the use of thin film resistors, the TSC21x offers an extremely precise gain and very high CMRR performance. Moreover, thanks to the possibility of fixing the output common mode voltage through a reference pin, the TSC21x can be either used as a unidirectional or bidirectional current sensing amplifier.

The STEVAL-AKI001V1 evaluation board allows the user to evaluate the conversion performance of the ADC120 8-channel analog-to-digital converter designed for 50 ksps to 1 Msps conversion. The board has several on-board sources like temperature sensor and strain gauge signals, and can accept external signals to allow measurement and evaluation of the ADC120 conversion performance based on its successive approximation register (SAR) with internal track-and-hold cell. The board is supplied ready-to-use in standalone mode, or it can be plugged onto a NUCLEO-L476RG board with SMT32 microcontroller, which enables further signal processing and PC communication.

The ASTRA platform (STEVAL-ASTRA1B) is a development kit and reference design that simplifies prototyping, testing and evaluating advanced asset tracking applications such as livestock monitoring, fleet management, and logistics. It comes with comprehensive software, firmware libraries, tools, battery, and plastic case. Thanks to its modular and optimized design, it simplifies the development of tracking and monitoring innovative solutions. The STEVAL-ASTRA1B is built around the STM32WB5MMG module and the STM32WL55JC SoC for short and long range connectivity (BLE, LoRa, and 2.4 GHz and sub 1-GHz proprietary protocols). ST25DV64K for NFC connectivity is also available. The on-board STSAFE-A110 enhances security features. The kit embeds a complete set of environmental and motion sensors (LIS2DTW12, LSM6DSO32X, HTS221, STTS22H, LPS22HH). Moreover, the Teseo-LIV3F GNSS module provides outdoor positioning. The power management, built around ST1PS02 and STBC03, is optimized for long battery life.

The STEVAL-BLUEMIC-1 evaluation board mounts the SPBTLE-1S Bluetooth®SMART application processor compliant with BT specification v4.2. It supports multiple simultaneous roles and can act as a Bluetooth Smart master and slave device at the same time. This BLE wireless battery powered solution also embeds digital MEMS microphone MP34DT05-A (or MP34DT04-C1 in the first generation board) and 3D accelerometer + 3D gyroscope, which render this evaluation board suitable for a wide range of advanced smart applications. The evaluation board comes with a SW development kit that includes the Bluetooth low energy stack, all the drivers for audio and inertial data acquisition, and button and LED management. A ready-to-use BlueVoice library is included as middleware and a sample application is provided to get you started with voice streaming over BLE to an Android or iOS device, running the ST BlueMS apps.