On August 1st, Reuters reported that Power Integrations, a leading semiconductor company, collaborated with Casambi Technologies OY to unveil a new reference design, DER-612, in San Jose, California. This innovative design presents a power factor-corrected, constant voltage (CV) and constant current (CC) 12W isolated flyback power supply specifically tailored for smart lighting applications. The design features a 3.3V power supply that powers the Casambi CBM-001 Bluetooth® wireless module, enabling convenient dimming and color management for four-string LED loads ranging from 0mA to 400mA. The power supply boasts a wide input voltage range of 90VAC to 265VAC and maintains a power factor of 0.8 or higher across all input voltages.
Attached is an image illustrating the DER-612 design in action. [Image description: A visual representation of the DER-612 reference design showcasing its compact size and integration capabilities.]
The design leverages Power Integrations’ InnoSwitch-CH power controller, which consolidates the primary, secondary, and feedback circuits into a single surface-mount off-line flyback switch IC. This IC integrates not only the primary-side power FET and controller but also the secondary-side synchronous rectification controller, along with Power Integrations' proprietary FluxLink magnetic induction coupling technology. This advanced feature allows the device to securely connect across the isolation barrier without requiring an optocoupler. Secondary-side control ensures precise constant voltage regulation and rapid step load responses, while simplified PWM control eliminates the need for a secondary DC/DC converter. The IC's high efficiency and minimal standby power consumption allow for designs that comply with DOE-6 energy efficiency standards, eliminating the need for additional heat sinks.
The CBM-001 is a Class 2 embedded Bluetooth 4.0 module engineered for LED lighting control, luminaires, and LED bulbs. Equipped with Casambi’s proprietary firmware, it ensures full compatibility with other Casambi devices. Through the Bluetooth 4.0 protocol, the CBM-001 can be wirelessly managed via the Casambi smartphone and tablet app. These devices automatically create a self-healing and self-organizing wireless mesh network, enabling control of numerous lights from any location without the need for additional gateway modules.
Hubie Notohamiprodjo, Director of Marketing for LED Lighting Products at Power Integrations, remarked: "Intelligent lighting systems offer sophisticated monitoring and control over home and workplace lighting. However, the standby power requirements of the control subsystem often diminish the energy-saving benefits of high-efficiency LEDs. The combination of low quiescent current consumption and InnoSwitch-CH’s exceptionally low standby power consumption enhances overall system standby performance while ensuring immediate illumination output."
Timo Pakkala, Co-founder and CEO of Casambi, added: "The Power Integrations InnoSwitch-CH power controller demonstrates exceptional efficiency, particularly under light loads. This ensures our Bluetooth modules operate continuously and efficiently, providing users with a scalable solution that delivers an enhanced user experience."
This collaboration underscores both companies' commitment to advancing smart lighting technologies, paving the way for more energy-efficient and user-friendly lighting solutions.
**Source:** Sohu Technology
**Editor:** Yan Zhixiang
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Laser Aspheric Lens
The aspheric lens uses a single element design, which helps reduce the number of lenses in the optical assembly. Unlike spherical lenses, aspheric lenses have a more complex surface, and the curvature of the surface gradually changes from the center of the lens to the edge of the lens. The most significant advantage is that it can correct the spherical aberration caused by the Spherical Lens in the collimation and focusing system. One of the applications of aspheric lenses includes focusing the output from a laser diode, which not only reduces the overall cost, but also outperforms components designed using traditional spherical optical lenses.
The asphere's more complex surface profile can reduce or eliminate spherical aberration and also reduce other optical aberrations such as astigmatism, compared to a simple lens. A single aspheric lens can often replace a much more complex multi-lens system. The resulting device is smaller and lighter, and sometimes cheaper than the multi-lens design.Aspheric elements are used in the design of multi-element wide-angle and fast normal lenses to reduce aberrations. Small molded aspheres are often used for collimating diode lasers.
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