STMicroelectronics STM32F334 | Demoboard AN5978

Description

This application note describes the MB1971 X-NUCLEO LLC DC/DC expansion board for converter shield designed specifically for the STM32F334/STM32G474 Nucleo boards. It is a low-cost and easy-to-use development kit useful to quickly evaluate and start develop application with the microcontrollers of the STM32F334/STM32G474 series. It plugs directly onto the MORPHO sockets, adding all the necessary hardware to evaluate the hi-resolution timer for the half-bridge LLC power converters.The STM32F334 & STM32G474 Arm® Cortex®-M4 microcontrollers, embedding a hi-resolution timer, combines high integration and performance. They have been designed for digital power conversion applications. This LLC DC/DC converter board illustrates how they can control a half-bridge LLC topology on both the primary and secondary side.This demonstration needs an external 12 V/1.5 A power supply that is connected to the add-on board.The firmware associated to this example needs to be programmed into your STM32F334/STM32G474 Nucleo board prior to the demonstration.Arm is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere.

Features

• Core: Arm® Cortex®-M4 32-bit CPU with FPU (72 MHz max), single-cycle multiplication and HW division DSP instruction
• Memories
• Up to 64 Kbytes of Flash memory
• Up to 12 Kbytes of SRAM with HW parity check
• Routine booster: 4 Kbytes of SRAM on instruction and data bus with HW paritycheck (CCM)
• CRC calculation unit
• Reset and supply management
• Low-power modes: Sleep, Stop, Standby
• VDD,VDDA voltage range: 2.0 to 3.6 V
• Power-on/Power-down reset (POR/PDR)– Programmable voltage detector (PVD)
• VBAT supply for RTC and backup registers
• Clock management
• 4 to 32 MHz crystal oscillator
• 32 kHz oscillator for RTC with calibration
• Internal 8 MHz RC (up to 64 MHz with PLLoption)
• Internal 40 kHz oscillator
• Up to 51 fast I/O ports, all mappable on external interrupt vectors, several 5 V-tolerant
• Interconnect matrix
• 7-channel DMA controller
• Up to two ADC 0.20 µs (up to 21 channels) with selectable resolution of 12/10/8/6 bits, 0 to 3.6 V conversion range, single-ended / differential mode, separate analog supply from 2.0 to 3.6 V
• Temperature sensor
• Up to three 12-bit DAC channels with analog supply from 2.4 V to 3.6 V

Typical applications

• Digital Power conversion applications

More information

• Datasheet
• IC product information