Unigroup Youshang Group launched a 15KW three-phase two-way charging pile power supply solution based on ST products
On July 20, 2021, the leading semiconductor component distributor dedicated to the Asia-Pacific region---Lianda Holdings announced that its subsidiary Youshang has launched a 15KW three-phase two-way charging pile power solution based on STMicroelectronics (ST) STM32G474RET6 .

Figure 1-The display board diagram of the 15KW three-phase two-way charging pile power supply program based on ST products launched by Dalian Dayoushang

Figure 2-The product entity diagram of the 15KW three-phase two-way charging pile power supply solution based on ST products launched by Dalian Dayoushang
ST STM32G474RET6 is ST's new generation digital power control chip. It uses Arm Cortex-M4 core with a main frequency of up to 170MHz. It supports floating-point operations, math accelerators and high-precision timers. The timer can send out 12 PWM arbitrary waveforms at the same time with precision. Up to 184ps, while the chip integrates 4 OP, multiple UART, I2C, DAC control, can realize real-time over-current and over-voltage protection.
In order to let users be more familiar with the control chip and build the basic architecture of digital power supply, ST also provides the B-G474E-DPOW1 development board, which is based on the STM32G474RET6 design and provides USB3.0, Type-C interface, and comprehensive software The Hal library and various software examples can help users accelerate the design of digital power prototype applications.

Figure 3-Block diagram of the 15KW three-phase two-way charging pile power supply program based on ST products launched by Dalian Dayoushang
Core technical advantages:
Three-phase Vienna, which can realize AC/DC DC/AC two-phase inverter, mainly used for high-power charging piles and other front-end applications;
ST's new generation of digital power control chip STM32G474, which realizes pure digital control and flexible configuration;
The size of the solution is small, and the frequency is up to 100KHz;
 The control chip can output 12 high-precision PWM, and the frequency can be configured with 2-3 level topology.
Scheme specifications:
Three-phase three-level two-way AC/DC conversion;
AC AC voltage: 380±10%Vac, DC DC voltage: 800Vdc;
AC to DC mode: PF "0.99, support soft start, suppress surge current;
The efficiency of the whole machine is as high as 99%;
 The main chip adopts ST's new generation digital power control chip STM32G474RET6, clocked at 170MHz, Flash 512K, LQFP64.