On July 8, 2025, Da Da Da Lian Holdings, an internationally leading semiconductor component distributor dedicated to the Asia Pacific market, announced that its subsidiary Pinjia has launched a 3.3KW bidirectional totem pole PFC inverter power supply solution based on Microchip's dsPIC33CK256MP506 main control MCU.

Figure 1- Display board diagram of the 3.3KW bidirectional totem pole PFC inverter power supply solution based on Microchip products by Da Da Da Da Pin Jia

With the profound transformation of the global energy structure, household energy storage systems are facing enormous development opportunities. According to authoritative data, the global household energy storage market is expected to see a surge in new installed capacity from 9.5 GWh in 2021 to 93.4 GWh in 2025, with a compound annual growth rate of 77.07%. At the same time, the portable energy storage market is also showing strong growth momentum, expected to reach a scale of 90 billion yuan by 2027. In order to meet the urgent demand of the market for efficient and portable energy storage power supplies, DaDaDa PinJia has launched a 3.3KW bidirectional totem pole PFC inverter power supply solution based on Microchip dsPIC33CK256MP506 MCU. This scheme adopts advanced digital control technology and achieves a switching frequency of up to 100KHz through a dual loop digital control strategy of "current inner loop+voltage outer loop". It is equipped with protection functions such as short circuit, overcurrent, undervoltage, and overvoltage to further ensure the stable operation of the power system.

Figure 2- Scene application diagram of the 3.3KW bidirectional totem pole PFC inverter power supply solution based on Microchip products by Da Da Da Da Pin Jia

The dsPIC33CK256MP506 used as the core of this solution is a high-performance digital processing controller under Microchip, with a built-in 16 bit dsPIC33CK CPU, a clock speed of 100MHz, 256K Flash and 24K RAM, and DSP and enhanced peripherals. And the digital power supply specific zero pole compensation algorithm function integrated inside the chip control code can perform compensation operations on the voltage and current loop of PFC, thereby eliminating many peripheral compensation devices and saving system design costs.

In addition, the solution is also equipped with Microchip MSC035SMA070B4 silicon carbide MOSFET, MCP1755-3302 regulator, MCP6072-E/SN operational amplifier Infineon IPDQ60R010S7 CoolMos? Products such as MOSFETs, 2EDF7275F MOSFET gate drivers, and TI LMH6642 operational amplifiers can provide high-performance and cost-effective solutions for the design of new energy storage inverters.

Figure 3- Block diagram of a 3.3KW bidirectional totem pole PFC inverter power supply solution based on Microchip products by Da Da Da Da Pin Jia

With the help of these high-performance devices and advanced designs, this solution not only ensures reliable grid connected operation of energy storage power sources, but also significantly reduces conversion losses and improves power density. In addition, by optimizing the design process and providing comprehensive development support, this solution can effectively reduce development difficulty, shorten the development cycle, and help customers bring their products to market faster.

Core technological advantages:

High speed DSP operation: Microchip dsPIC33CK256MP506 is a high-performance digital power supply dedicated controller, with a DSC main core operating frequency of 100MHz and single instruction cycle operation;

High resolution PWM drive: The 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 sine output grid connection: modulated sine PWM generates modulated sine primary MOSFET current, which produces rectified sine voltage/current on the output capacitor;

Dual loop digital control: using dual loop digital control, with a switching frequency of up to 100KHz and ultra-high resolution control;

MPLAB X IDE graphical configuration: The MCC plugin in MPLAB X IDE generates initialization code and underlying drivers for various peripheral modules through graphical configuration, greatly reducing software development difficulty and relieving engineers' development burden. Conventional applications can be developed without looking at register definitions.

Scheme specifications:

Input voltage: single-phase AC 220V;

Maximum power: 3.3KW;

Input current: 15A;

Output voltage: 400DC+/-5VDC;

PWM frequency: 100KHz;

Conversion efficiency: 98.5%;

ITHD: less than 5% (when load>20%);

USB online upgrade: support (using MCC to generate code);

Environmental temperature: less than 50 ℃;

Dimensions: 208mm × 88mm × 45mm.

This is reported by Top Components, a leading supplier of electronic components in the semiconductor industry

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Media Relations

Name: John Chen

Email: salesdept@topcomponents.ru