Data Brief

Digital power supply control board based on full pin-count STM32G474QET6

Rev 1 - June 2025
DB5445


Features

  • Control board for power converters: SMPS, PFC, DC-DC and DC-AC converters
  • STM32G474QET6 Arm Cortex®-M4 core-based microcontroller, featuring 512 Kbytes of flash memory and 128 Kbytes of SRAM, in LQFP128 package
  • LDO embedded for 5 V supply
  • Board connectors
    • 32-pin digital and 68-pin analog main connector
    • USB micro 5 V only
    • STDC14 STLINK programming and debug connector
    • Analog waveform test point
    • Isolated serial COM
    • Expansion board DIG/AN connectors
  • ESD protection and filter for MCU pin connections
  • Analog and digital pins test points
  • Expansion connectors
    • SWIM–UART–I2C communication protocol connector
    • 14-pin analog and digital connectors
  • 3 user LEDs (status–error–fault)
  • 1 bicolor LED for full debugging
  • Reset button
  • Support of a wide choice of integrated development environments (IDEs)
    • IAR™, Keil®, and STM32CubeIDE
  • Ecosystem compatibility
    • STM32Cube environment
    • Digital power STMicroelectronics firmware package

Description

The STEVAL-DPSG474Q is a control board dedicated to digital power applications.

It can control the power stage of converters requiring high pin counting (PFC, DC-DC, DCAC), or can be used to control the dual stage conversion (PFC+DCDC).

The STEVAL-DPSG474Q consists of a platform based on the STM32G474QE microcontroller from the STM32G4 family.

The STM32G474QE microcontroller includes the high-performance Arm® Cortex®-M4 32-bit RISC core operating at up to 170 MHz frequency, a floating-point unit (FPU), a full set of DSP (digital signal processing) instructions, and high-speed embedded memories (512 Kbytes of flash memory and 128 Kbytes of SRAM).

The device embeds peripherals that allow mathematical/arithmetic function acceleration (CORDIC for trigonometric functions and FMAC unit for filter functions).

The MCU offers: five fast 12-bit ADCs (5 Msps), seven ultrafast comparators, six operational amplifiers, seven DAC channels (three external and four internal), a low-power RTC, 32-bit timers, three timers dedicated to motor control, seven general-purpose 16-bit timers, one 16-bit low-power timer, and the high-resolution timer (HRTIM) with 184 ps resolution, specifically designed to drive power conversion systems.

The main connector embeds two sections for separate analog and digital behavior, with 32 pins and 68 pins respectively. It provides all the PWM control signals, sensing networks, and protection features needed for a wide range of digital power supply applications.

A full pin-count STM32G474QE solution, in addition to the sophisticated embedded hardware accelerator, and powerful Arm® core, enables handling complex digital power converters like multilevel and multistage structures. Several connectors also allow extending the capability of this platform in terms of I/O, communication, telemetry, debugging, and control plus protection features.

Full integration into the STM32Cube environment and digital power ST firmware package support allow implementing and deploying digital power converter control with a dedicated architecture and control features, to evaluate several turnkey control structures. Additional embedded debugging features such as LEDs and analog, digital test points maximize the design capability for the user.

Schematic diagrams

Figure 1. STEVAL-DPSG474Q circuit schematic

image/svg+xml Place capacitors as close as possible to each MCU Vdd Pin GND CON COMM PORTS & SELECTOR CONNECTION BETWEEN TWO CONTROL BOARDS UART OPTOCOUPLER CAP CLOSE to MCU PIN UART TTL (3,3V) UART TTL (3,3V) I2C TTL (3,3V) ST-LInk V3 & Adapter CON uUSB Power (no data) COMMs Connectors ISOLTAED COMM USER MONITORING STM32G474QE MAIN CONNECTORs DIGITAL ACTUATION SECTION -------- HRTIM ----------------------- ADVTIM -------------- ANALOG SECTION User LEDs TEST POINT POWER SUPPLY STLINK - STDC14 SECTION USER BUTTONS fc=1.6MHz NRST SWDIO SWCLK NRST SWDIO SWCLK VCP_TX VCP_RX VCP_TX VCP_RX CH1DAC CH2DAC CH3DAC CH1DAC CH2DAC CH3DAC ACT1 ACT2 ACT3 ACT4 ACT5 ACT6 ACT7 ACT8 ACT9 ACT10 ACT11 ACT12 ACT1 ACT2 ACT3 ACT4 ACT5 ACT6 ACT7 ACT8 ACT9 ACT10 ACT11 ACT12 ACT13 ACT14 ACT15 ACT16 ACT17 ACT18 ACT19 ACT20 ACT21 ACT22 ACT23 ACT24 ACT25 ACT26 ACT27 ACT28 ACT29 ACT30 ACT13 ACT14 ACT15 ACT16 ACT17 ACT18 ACT19 ACT20 ACT21 ACT22 ACT23 ACT24 ACT25 ACT26 ACT27 ACT28 ACT29 ACT30 ANLG1 ANLG2 ANLG3 ANLG4 ANLG5 ANLG6 ANLG7 ANLG8 ANLG9 ANLG10 ANLG11 ANLG12 ANLG13 ANLG14 ANLG15 ANLG16 ANLG17 ANLG18 ANLG19 ANLG20 EVENT1 EVENT2 EVENT3 EVENT4 EVENT5 EVENT6 ANLG21 ANLG22 ANLG23 ANLG24 ANLG25 ANLG26 VDD_iso USART_TX_iso USART_RX_iso COMM1 COMM2 COMM3 COMM4 COMM5 COMM6 COMM7 COMM8 DIG13 DIG14 DIG11 DIG12 ANLG27 ANLG29 ANLG30 ANLG28 DIG1 DIG2 DIG3 DIG4 DIG5 DIG6 DIG7 DIG8 COMP1 COMP2 COMP3 COMP4 COMP5 COMP6 ANLG20_MCU ANLG19_MCU ANLG18_MCU ANLG25 ANLG17_MCU EVENT1 ANLG14_MCU ANLG13_MCU ANLG12_MCU COMP1 EVENT6 ANLG8_MCU ANLG22 COMP2 ANLG21 ANLG16_MCU ANLG15_MCU EVENT2 EVENT3 EVENT4 EVENT5 DIG5 ANLG7_MCU ANLG6_MCU ANLG5_MCU ANLG4_MCU ANLG3_MCU ANLG2_MCU ANLG1_MCU ANLG11_MCU ANLG10_MCU ANLG9_MCU EVENT8 EVENT7 ANLG24 ANLG23 COMP3 DIG14 EVENT9 EVENT10 DIG12 DIG11 TEST1 DIG9 DIG10 TEST2 VDD_iso USART_RX_iso MCU_USART_ISO_RX USART_TX_iso MCU_USART_ISO_TX NRST USR_BTN USR_BTN STATUS_LED ERROR_LED FAULT_LED BLED TEST1 TEST2 I2C_SDA I2C_SCL I2C_SDA I2C_SCL USART_RX USART_TX FDCAN_RX FDCAN_TX USART_TX USART_RX FDCAN_RX FDCAN_TX COMM1 COMM2 COMM3 COMM4 COMM5 COMM6 EVENT7 EVENT8 EVENT9 EVENT10 DIG9 DIG10 ANLG1 ANLG1_MCU ANLG20 ANLG20_MCU ANLG19 ANLG19_MCU ANLG18 ANLG18_MCU ANLG17 ANLG17_MCU ANLG16 ANLG16_MCU ANLG15 ANLG15_MCU ANLG14 ANLG14_MCU ANLG13 ANLG13_MCU ANLG12 ANLG12_MCU ANLG11 ANLG11_MCU ANLG10 ANLG10_MCU ANLG9 ANLG9_MCU ANLG8 ANLG8_MCU ANLG7 ANLG7_MCU ANLG6 ANLG6_MCU DIG2 DIG3 DIG4 DIG5 DIG6 DIG7 DIG8 DIG1 ANLG5 ANLG5_MCU ANLG4 ANLG4_MCU ANLG3 ANLG3_MCU ANLG2 ANLG2_MCU MCU_USART_ISO_TX MCU_USART_ISO_RX ANLG1_MCU ANLG2_MCU ANLG3_MCU ANLG4_MCU ANLG5_MCU ANLG6_MCU ANLG7_MCU ANLG8_MCU ANLG9_MCU ANLG10_MCU ANLG11_MCU ANLG12_MCU ANLG13_MCU ANLG14_MCU ANLG15_MCU ANLG16_MCU ANLG17_MCU ANLG18_MCU ANLG19_MCU ANLG20_MCU ACT1 ACT7 ACT2 ACT8 ACT3 ACT9 ACT4 ACT10 ACT5 ACT11 ACT6 ACT12 3V3 3V3 3V3 AVDD 3V3 3V3 AVDD AGND AGND AGND VREF AGND AVDD VREF AGND AGND AGND AGND AGND GND VDD_5V_INT VDD_5V_EXT +5V VDD_5V_USB +5V 3V3 GND GND GND GND VDD_5V_EXT AGND AGND AGND AGND AGND AGND AGND GND_iso AGND AGND VDD_5V_INT GND AGND AGND VDD_iso 3V3 VDD_iso GND GND_iso GND GND GND_iso GND_iso VDD_iso 3V3 GND GND_iso 3V3 3V3 3V3 +5V 3V3 VDD_5V_USB 3V3 3V3 +5V 3V3 AGND AGND AGND AGND AGND AGND AGND AGND AGND AGND AGND AGND AGND AGND AGND AGND AGND AGND AGND AGND AGND +5V R9 2k TP4 RCU-0C 1 1 TP41 RCU-0C 1 1 D3 LED YELLOW A C C33 10pF C41 10pF J4 COM 1 2 3 4 J6 FTSH-107-01-L-DV-K-A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 L1 WE-CBF 1 2 C56 0.1uF 1 2 TP10 RCU-0C 1 1 C64 10pF TP43 1 1 J8 Con2 1 2 IC2 ESDALC6V1W5 I_O1 1 GND 2 I_O2 3 I_O3 4 I_O4 5 C10 0.1uF 1 2 TP47 RCU-0C 1 1 C48 10pF C39 10pF TP26 1 1 C45 10pF C3 15pF 1 2 J10 Con2 1 2 R23 10R TP14 RCU-0C 1 1 TP3 RCU-0C 1 1 C50 10pF TP5 J13 JUMPER 1 2 3 JP1 STRIP_2X3 1 3 5 2 4 6 R12 100 J14 JUMPER 1 2 3 C70 10pF TP44 1 1 C15 0.1uF 1 2 R28 10R TP27 1 1 R32 10R TP19 RCU-0C 1 1 S1 FSM4JSMA 1 4 2 3 C57 470nF 1 2 R24 10R S2 FSM4JSMA 1 4 2 3 C35 10pF C20 10pF R8 2k D6 LED GREEN RED A2 C2 A1 C1 C42 10pF J5 con4-strip-male 1 2 3 4 TP48 R36 10R TP23 RCU-0C 1 1 C29 10pF J2 con4-strip-male 1 2 3 4 TP45 1 1 C49 0.1uF 1 2 R10 1k TP24 RCU-0C 1 1 C54 10uF 1 2 C32 10pF R19 10R TP31 1 1 C60 10pF J12 Con32 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 C18 10pF C31 10pF TP30 TP28 RCU-0C 1 1 R20 10R C17 0.1uF 1 2 D1 LED BLUE A C C21 10pF C28 0.1uF 1 2 C24 10pF C4 15pF 1 2 C65 10pF C72 10pF R17 10R C7 0.1uF 1 2 C68 1uF 1 2 C5 0.1uF 1 2 TP32 1 1 C61 10pF TP21 C11 0.1uF 1 2 TP36 RCU-0C 1 1 R26 10R R35 10R TP13 RCU-0C 1 1 R11 1k TP12 R18 10R + C55 100uF 16V 1 2 C27 10pF ACSL-6210 U2 Vout2 6 GND2/K1 5 A1 8 GND1/K2 1 Vout1 2 VDD1 3 A2 4 VDD2 7 C79 10pF TP11 R141k TP40 RCU-0C 1 1 TP18 RCU-0C 1 1 C46 10pF C74 0.1uF 1 2 R5 47R C52 10pF J9 Con2 1 2 J7 USB2.0 MICRO VCC 1 D- 2 D+ 3 ID 4 GND 5 M1 6 M2 7 M3 8 M4 9 R33 10R J15 Ext Supply 1 2 C43 10pF C44 10pF TP34 1 1 R239 C53 10pF R37 10R TP46 RCU-0C 1 1 C38 10pF TP15 R34 10R TP22 RCU-0C 1 1 C12 0.1uF 1 2 TP2 C76 0.1uF 1 2 C6 0.1uF 1 2 TP20 TP6 D5 ESDALC6V1-1U2 J11 Con68 33 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 R31 10R TP35 1 1 C78 10pF R25 10R C63 10pF C51 10pF R639 TP17 C75 1uF 1 2 C40 10pF CN1 ANALOG_EXT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 C34 10pF TP33 C73 10pF C69 0.1uF 1 2 L2 WE-CBF 1 2 C25 10pF C58 0.1uF 1 2 TP7 J16 Con2 1 2 C47 10pF R7 0 C13 0.1uF 1 2 C80 10pF R29 10R U3LD1117S33CTR Vout_2 2 GND 1 Vin 3 Vout_4 4 TP38 1 1 R22 10R C67 0.1uF 1 2 C77 10pF R3 0 C37 10pF D7 ESDALC6V1-1U2 C1 0.1uF 1 2 TP25 RCU-0C 1 1 C30 10pF J1 con4-strip-male 1 2 3 4 R16 10k 1 of 3 U1A STM32G474QET6 PA0 27 PA1 28 PA2 29 PA3 32 PA4 33 PA5 34 PA6 35 PA7 36 PA8 89 PA9 90 PA10 91 PA11 92 PA12 93 PA13 96 PA14 98 PA15 99 PB0 39 PB1 40 PB2 41 PB3 118 PB4 119 PB5 120 PB6 121 PB7 122 PB8-BOOT0 123 PB9 124 PB10 62 PB11 65 PB12 66 PB13 67 PB14 68 PB15 69 PC0 22 PC1 23 PC2 24 PC3 25 PC4 37 PC5 38 PC6 80 PC7 81 PC8 87 PC9 88 PC10 100 PC11 101 PC12 102 PC13 7 PC14-OSC32_IN 8 PC15-OSC32_OUT 9 PD0 108 PD1 109 PD2 112 PD3 113 PD4 114 PD5 115 PD6 116 PD7 117 PD8 70 PD9 71 PD10 72 PD11 73 PD12 74 PD13 75 PD14 76 PD15 77 C71 10pF C62 10pF C26 10pF IC1 ESDALC6V1W5 I_O1 1 GND 2 I_O2 3 I_O3 4 I_O4 5 TP39 1 1 C8 0.1uF 1 2 D2 LED GREEN A C C16 0.1uF 1 2 TP8 R15 10k TP1 C23 10pF TP29 RCU-0C 1 1 R27 10R R13 1k C2 0.1uF 1 2 TP9 RCU-0C 1 1 C36 10pF C14 0.1uF 1 2 C9 0.1uF 1 2 JUMPER1 60900213421 C22 10pF D4 RED LED A C 2 of 3 STM32G474QET6 U1B PE0 125 PE1 126 PE2 1 PE3 2 PE4 3 PE5 4 PE6 5 PE7 53 PE8 54 PE9 55 PE10 56 PE11 57 PE12 58 PE13 59 PE14 60 PE15 61 PF0-OSC_IN 19 PF1-OSC_OUT 20 PF2 26 PF3 10 PF4 11 PF5 14 PF6 97 PF7 15 PF8 16 PF9 17 PF10 18 PF11 48 PF12 49 PF13 50 PF14 51 PF15 52 PG0 82 PG1 83 PG2 84 PG3 85 PG4 86 PG5 103 PG6 104 PG7 105 PG8 106 PG9 107 PG10-NRST 21 3 of 3 STM32G474QET6 U1C VDD 13 VDD_1 31 VDD_2 47 VDD_3 64 VDD_4 79 VDD_5 95 VDD_6 111 VDD_7 128 VDDA 45 VBAT 6 VSS 12 VSS_1 30 VSS_2 46 VSS_3 63 VSS_4 78 VSS_5 94 VSS_6 110 VSS_7 127 VSSA 42 VREF+ 43 VREF+_1 44 J3 COM ISO 1 2 3 4 TP37 RCU-0C 1 1 R21 0 CN2 DIGITAL_EXT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 C66 10pF C19 10pF C59 10pF TP16 TP42 1 1 R1 47R R30 10R R4 0 VCP_RX VCP_TX NRST JTDI SWO SWCLK GNDDetect SWDIO SWDIO SWCLK SWO NRST JTDI GNDDetect VCP_TX VCP_RX NRST NRST SWDIO SWDIO SWCLK SWCLK NRST SWDIO SWCLK VCP_TX VCP_RX USART1_TX USART1_RX USART1_TX USART1_RX USART2_TX USART2_RX USART2_TX USART2_RX DAC1_OUT1 DAC1_OUT2 DAC2_OUT1 USART3_TX USART3_RX SPI1_SCK SPI1_MISO SPI1_MOSI SPI1_SCK SPI1_MISO SPI1_MOSI SPI1_NSS SPI1_NSS I2C3_SCL I2C3_SDA I2C3_SDA I2C3_SCL FDCAN1_RX FDCAN1_TX FDCAN1_RX FDCAN1_TX HRTIM1_CHC1 HRTIM1_CHC2 HRTIM1_CHD2 HRTIM1_CHD1 HRTIM1_CHF1 HRTIM1_CHF2 HRTIM1_CHE1 HRTIM1_CHE2 HRTIM1_CHA1 HRTIM1_CHA2 HRTIM1_CHB1 HRTIM1_CHB2 HRTIM1_CHA1 HRTIM1_CHA2 HRTIM1_CHB1 HRTIM1_CHB2 HRTIM1_CHC1 HRTIM1_CHC2 HRTIM1_CHD1 HRTIM1_CHD2 HRTIM1_CHE1 HRTIM1_CHE2 HRTIM1_CHF1 HRTIM1_CHF2 TIM1_CH1 TIM20_CH3 TIM20_CH1 TIM20_CH2 TIM1_CH2N TIM1_CH2 TIM1_CH3N TIM1_CH3 TIM20_CH1N TIM20_CH2N TIM8_CH1 TIM8_CH1N TIM8_CH2N TIM8_CH3N TIM8_CH2 TIM8_CH3 TIM1_CH1 TIM1_CH1N TIM1_CH2 TIM1_CH2N TIM1_CH3 TIM1_CH3N TIM8_CH1 TIM8_CH1N TIM8_CH2 TIM8_CH2N TIM8_CH3 TIM8_CH3N TIM20_CH1 TIM20_CH1N TIM20_CH2 TIM20_CH2N TIM20_CH3 TIM20_CH3N COMP1_INM COMP1_INP ADC1_IN3 ADC1_IN4 ADC2_IN4 HRTIM1_FLT1 ADC3_IN12 ADC3_IN1 ADC2_IN12 COMP4_OUT HRTIM1_EEV3 ADC1_IN14 COMP3_INP COMP3_OUT ADC1_IN9 ADC2_IN5 ADC2_IN11 HRTIM1_FLT6 HRTIM1_EEV2 HRTIM1_EEV1 TIM1_CH1N TIM8_BKIN TIM2_CH1 TIM2_CH2 TIM2_CH3 ADC4_IN12 ADC3_IN7 ADC3_IN8 ADC3_IN9 ADC3_IN10 ADC3_IN11 COMP7_INM TIM16_CH1 TIM3_CH1 TIM3_CH2 TIM3_CH3 TIM3_CH4 TIM20_CH3N COMP4_INP COMP4_INM ADC3_IN2 TIM1_BKIN2 TIM1_BKIN ADC1_IN10 COMP3_INM GPIO10 COMP1_OUT GPIO14 TIM5_CH1 TIM20_BKIN TIM20_BKIN2 TIM15_CH1 TIM15_CH2 GPIO48 GPIO51 GPIO52 GPIO104 USART_RX_iso MCU_USART_ISO_RX USART_TX_iso MCU_USART_ISO_TX MCU_USART_ISO_RX USART_TX_iso USART_RX_iso MCU_USART_ISO_TX USR_BTN BLED BLED STATUS_LED FAULT_LED ERROR_LED FDCAN_TX FDCAN_RX USART_TX USART_RX I2C_SDA I2C_SCL GPIO8 GPIO9 TIM3_CH4 TIM3_CH2 TIM3_CH3 TIM2_CH3 TIM3_CH1 TIM2_CH1 TIM2_CH2 Reserved USART3_TX USART3_RX

Revision history

Table 2. Document revision history
Date Revision Changes
04-Jun-2025 1 Initial release.

List of tables

Table 1. STEVAL-DPSG474Q versions

Table 2. Document revision history

List of figures

Figure 1. STEVAL-DPSG474Q circuit schematic

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