Merrill's detailed LED driver product line

The global lighting market is continually expanding with solutions that reduce costs and save valuable power. Micrel's range of lighting display solutions includes LED drivers , high brightness LED drivers , linear LED drivers, EL drivers, display drivers, latch drivers and input/output (I/O) expanders. Its growing portfolio also includes white LED (WLED) drivers that significantly extend the talk time of mobile handsets . These solutions are suitable for a wide range of mobile devices, including mobile handheld devices, smart phones, portable media/MP3 players, portable display backlights in portable navigation devices (GPS) and other portable devices, keyboard backlights and camera flashes. In addition, Micrel supplies a range of buck and boost high-brightness LED drivers that have been optimized for both high efficiency and ease of use for landscape, cabinet, building and automotive lighting applications.

Introduction of new technology advantages

At present, Merrill has successfully solved many challenges in the LED market , including integrating more functions into smaller and smaller integrated circuit boards, and designing more powerful solutions without increasing costs and continuing to follow consumer trends. At the forefront of customer demand, we are the first to introduce high-performance, cost-effective solutions to the market.

The MIC3205 is an excellent example of a hysteresis, buck, high-brightness LED (HBLED) driver developed by Micrel. The FM solution is patent-pending and maintains a constant operating frequency over the entire input voltage range. The MIC3205 provides an ideal solution for internal/external lighting, architectural and ambient lighting, LED bulbs and other general lighting applications.

The MIC3205's input voltage ranges from 4.5V to 40V, making it ideal for lighting applications that require a large input voltage range. Hysteresis control ensures good power supply rejection and fast response during load transients and Pulse Width Modulation (PWM) attenuation. High-side current sensing and on-chip current sense amplifiers provide LED current accuracy of ±5%. This product uses an external high-side current sense resistor to set the output current.

The MIC3205 provides a dedicated Pulse Width Modulation (PWM) input (DIM) for a wide range of pulse dimming. The high frequency switch operates at up to 1.5MHz and uses smaller external components for maximum space savings and reduced cost.

The MIC3205 operates over a contact temperature range of -40°C to +125°C and is available in a 10-lead 3mm x 3mm MLF? package.

Many power management companies in the market are involved in the LED driver business, and the driving force in the LED market is the demand for products with higher power density, cheaper, more integrated and more efficient. At the same time, the cost driver is for applications with lower pricing structures. The space on the integrated circuit board is getting smaller and smaller, and the purchase and assembly of components on the integrated circuit board requires less and less resources/logistics, which significantly affects the need for higher integration. Finally, improving efficiency is part of a global initiative to conserve electricity and save energy costs.

Mai Rui analyzes the future of the LED market

The LED market is very strong and growing. As manufacturers continue to increase their energy efficiency and product life, LEDs bring many benefits to the market; LEDs are environmentally friendly, easy to handle and contain little or no toxic substances; they have excellent convenience and Practicality, widely applicable to many environments and applications.

Even so, there is still a need to continue technological innovation to maintain growth. The cost per LED output unit (lumens) is increasing. In the production and supply of LED lights, it is necessary to continue to reduce overall costs, spawn a number of new technologies, and guide consumers to choose such products, rather than other more market-recognized solutions. Due to the increasing price/performance ratio of LED solutions and the fact that LED drivers are far superior to other solutions (including halogen lamps and standard bulbs), we expect demand for LED solutions to increase.

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