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Digital power supply control board based on STM32F334

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Product overview


The STEVAL-DPS334C1 is a digital power supply control kit, consisting of a main board based on the STM32F334R8 microcontroller from STM32F3 family and an adapter board to program the microcontroller.

The STM32F334R8 microcontroller includes the high-performance ARM® Cortex®-M4 32-bit RISC core operating at up to 72 MHz frequency, a floating point unit (FPU) and high-speed embedded memories (64 Kbytes of Flash memory and 16 Kbytes of SRAM). The MCU offers two fast 12-bit ADCs (5 Msps), three ultra-fast comparators, an operational amplifier, three DAC channels, a low-power RTC, one general-purpose, 32-bit timer, one timer dedicated to motor control, four general-purpose, 16-bit timers and the high-resolution timer (HRTIM), specifically designed to drive power conversion systems.

The main board embeds a standard 64-pin DIN 41612 connector for connection with a power board, providing all the control signals, sensing networks and protection features needed for a wide range of digital power supply applications. The board can be supplied by an external 5 V supply voltage either through a dedicated connector or through the main connector.

The adapter board provides a configurable user communication (SMBus, CAN or RS-232) with two DB9 connectors and the appropriate transceiver ICs, a dedicated 10-pin connector which provides the SWD interface for debugging and USART communication for user interface (UI), as well as the standard JTAG connector for programming. The board includes a reset button and a termination resistance between the CAN lines.

The STEVAL-DPS334C1 is designed to be easily connected with another control board via opto-coupled serial communication and dedicated connectors.

  • All features

    • Control board for digital SMPS based on STM32F334 microcontroller
    • High-resolution timer (HRTIM) for DSMPS applications
    • 64-pin DIN 41612 connector for DSMPS modular approach
    • Opto-coupled serial communication for board-to-board communication
    • RC filters for analog inputs
    • Protection of analog lines of microcontroller with diode arrays
    • Adapter board provided for programming and User Communication (USART, CAN, SMBus)
    • Supply voltage: 5 V
    • Embedded 5 V/3.3 V voltage regulator
    • Dedicated test points for debugging
    • LED signaling for power-on, faults and general purpose
    • RoHS compliant

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade WEEE Compliant Material Declaration**
CARD Industrial Ecopack2 Yes




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RoHS Compliance Grade


(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors