In the overall design of the power supply, first of all, we need a stable power supply for the motor driver chip. Here we choose XXL1509 to convert the input voltage of up to 40V into 12V voltage for stable power supply of subsequent devices. Secondly, after the voltage is reduced by XXL1509, it cannot directly drive the motor. We need a driver chip to amplify the ability to drive the load and effectively protect the circuit. Here we choose XBLW CP2139 motor driver chip, which can provide a maximum drive current of 14A. Finally, we also need a power supply for MCU to provide a stable power supply. Here we choose XBLW LM317 LDO linear regulator to provide a stable 5V power supply for MCU.

The figure shows the power supply circuit diagram of electric curtains

      In the hardware architecture design of electric curtains, the integration of the XXL1509 DC-DC voltage regulator chip is the key to ensure the stable operation of the system. With its high efficiency and low power consumption, the XXL1509 provides a stable power supply solution for electric curtains. In the drive motor control circuit of electric curtains, the chip is able to stabilize the input voltage at a specific level required by the motor, thereby ensuring smooth movement and precise control of the curtains. The low quiescent current design of the chip further reduces the standby power consumption, which meets the energy efficiency requirements of modern smart homes. By integrating the XXL1509 DC-DC voltage regulator chip, electric curtains not only achieve high-efficiency operation, but also provide users with a more energy-saving option, which adds an additional competitive advantage to the product in the context of increasingly fierce market competition.

XXL1509 SOP-8

四、Functional testing and performance evaluation

      In the development process of electric curtains, the performance evaluation of the XXL1509DC-DC voltage regulator chip is a key link to ensure product stability and reliability. This chip is responsible for providing stable power output in the electric curtain system, and its conversion efficiency, thermal management capability and load adjustment capability directly affect the operating efficiency and life of the electric curtain. In the performance evaluation, XXL1509 can maintain a high efficiency conversion of more than 90% under full load conditions of 12V output, which not only reduces energy loss, but also reduces heat generation during system operation, thereby improving the energy efficiency ratio of electric curtains. In addition, by simulating working conditions under different ambient temperatures, we verified that the chip can still maintain stable performance output in a wide temperature range of -40 to +125℃, which provides reliable protection for the application of electric curtains under extreme climatic conditions.

五、Case summary and future prospects

     In the development process of applying the XXL1509 DC-DC voltage regulator chip to electric curtains, one of the key learning points is about the optimization of power management.

      When designing the electric curtain power board, we first need to ensure that the XXL1509 works stably within the limit voltage range, pay attention to thermal management and power loss, improve conversion efficiency by optimizing circuit design, and design effective heat dissipation mechanisms (such as heat sinks and optimized PCB layout) to prevent overheating under high load. In addition, use appropriate compensation networks to ensure loop stability, consider electromagnetic interference (EMI) and immunity (EMS), and reduce EMI through filters and shielding technology, while choosing the right package type to balance heat dissipation and cost, and finally optimize PCB layout to reduce parasitic effects and improve overall performance.

       n addition, we need to consider the overall performance of the system during the design phase. By adopting a modular design, the XXL1509 DC-DC voltage regulator chip is integrated with the drive circuit and control unit of the electric curtain to ensure the compatibility and coordination between the various components. On this basis, we can also add additional functions to this system, such as automatically lowering the curtains when exposed to light and remote control.

Add photosensitive elements to make it automatic

      With the rapid growth of the smart home market, electric curtains, as a key component of its market segment, are becoming a core element in home automation systems. The application of XXL1509 DC-DC voltage regulator chip in the field of electric curtains not only improves energy efficiency and system stability, but also provides a solid technical foundation for the market promotion of products. Looking to the future, the deep integration of IoT technology will make electric curtains more intelligent and personalized, and can be precisely controlled according to user habits and preferences to achieve higher energy-saving effects.

      Promoting the localization of chips in the field of electric curtains is of great significance to enhancing the autonomy and controllability of domestic industries, reducing costs, improving market competitiveness, and breaking the monopoly of foreign technology, which is the core concept of Xinbo Le. Through continuous optimization of chip design, improvement of manufacturing and packaging processes, and strict implementation of testing standards, domestic chips have been widely used in smart home products such as electric curtains. They not only improve control accuracy and user experience, but also save energy. In addition, localization has also promoted technological innovation and research and development, reduced dependence on external supply chains, and heralded greater development prospects in a wider range of application areas in the future.