With the explosive development of social economy in the new era, the global energy structure has undergone profound changes, and the global demand for home energy storage systems has also grown rapidly in recent years. In the home energy storage system, when power consumption is low, the battery pack in the household energy storage system can charge itself to prepare for use during peak power consumption or power outages. According to data from Wood Mackenzie, IEA, SolarpowerEU, and USDOE, the new installed capacity of the global household energy storage market is expected to increase from 9.5GWh in 2021 to 93.4GWh in 2025, with a compound growth rate of 77.07%. The global home energy storage system market sales will be US$8.74 billion in 2023 and are expected to reach US$49.86 billion in 2029, with a compound annual growth rate (CAGR) of 33.68% (2023-2029). In addition, it is predicted that the portable energy storage market will reach 90 billion yuan in 2027; another outlet is the continued growth of the AI ​​Server market, which has brought about the demand for high-power server power supplies required for digital and intelligent servers. Currently, a single 3KW server power supply It has also begun to be widely used.

For the above applications, traditional switching power supplies are difficult to meet the requirements of "small size, light weight, and high efficiency". Since the all-digital power supply is controlled by MCU, user requirements can be realized accurately and flexibly.

The high power density 3.3KW bidirectional totem pole PFC inverter power supply developed by Dasenic based on Microchip DSPIC33CK256MP506 is one of the most cost-effective solutions on the market.

This solution uses dual-loop digital control of current inner loop + voltage outer loop. The switching frequency can reach 100KHz. It is equipped with protection functions such as short circuit, overcurrent, undervoltage, and overvoltage. The communication interface UART transmits data externally.

The focus of the majority of power supply R&D engineers is to achieve reliable and stable grid-connected operation of energy storage power supply systems, reduce conversion losses, increase power density, and reduce development difficulty and development cycle. Microchip’s Level 4 pure digital power solution will provide a perfect solution for the new energy storage and inverter industry.

Scenario application diagram

Product entity diagram

Display board photo

Scheme diagram

Core technical advantages

High-speed DSP operation: MICROCHIP DSP DSPIC33CK256MP506 is a high-performance digital power supply dedicated controller. The DSC main core operating frequency is 100MHz and operates in a single instruction cycle.

High-resolution PWM drive: PWM resolution is 250ps, which improves power conversion efficiency with appropriate switching frequency and ensures good EMI characteristics.

Dedicated ADC core and shared ADC module: ADC conversion delay is only 285ns.

Bidirectional totem pole PFC: single-phase AC 220V input, realizing bidirectional AC-DC conversion operation, high power density, high efficiency, and high power factor.

AC sinusoidal output grid connection: The modulated sinusoidal PWM produces a modulated sinusoidal primary MOSFET current, which produces a rectified sinusoidal voltage/current on the output capacitor.

Dual-loop digital control: Using dual-loop digital control, the switching frequency can reach 100KHz, ultra-high resolution control.

MPLAB X IDE graphical configuration: The MCC plug-in in MPLAB Development can be completed without looking at register definitions.

Solution specifications

Input voltage: Single phase AC 220V

Maximum power: 3.3KW

Input current: 15A

Output voltage: 400DC +/- 5 Vdc

PWM frequency: 100KHz

Conversion efficiency: 98.5%

iTHD: less than 5% (when Load >20%)

USB online upgrade: Supported (use MCC to generate code)

Ambient temperature: less than 50℃

Dimensions: 208mm X 88mm X 45mm