Compact LED drivers deliver 90% efficiency, pass CISPR 25 EMI specs

July 16, 2019 //By Christoph Hammerschmidt
Compact LED drivers deliver 90% efficiency, pass CISPR 25 EMI specs
A simpler, more efficient method for driving high-brightness LEDs (HBLEDs) – this is what Maxim Integrated Products is promising automotive lighting designers. The promise refers to Maxim’s new MAX25610A and MAX25610B LED drivers: The synchronous buck, buck-boost LED drivers/DC-DC converters offer a complete solution that features industry-leading EMI performance, with high efficiency and small size.

As the automotive industry accelerates its transition to all-LED lighting, designers face new challenges in improving efficiency, simplifying designs and reducing system costs, while passing strict EMI requirements. Traditionally, designers had to employ multiple components in their systems in order to pass EMI specifications. To achieve performance gains, they would often have to compromise on space and system efficiency while also addressing thermal issues and high costs. 

The MAX25610A/B LED drivers address all these concerns by combining solution size, high efficiency and EMI performance into a single package. Capable of driving up to eight HBLEDs directly from the automotive battery and integrating many external components to save on bill of materials (BOM) costs and space, these devices are targeting automotive lighting systems as well as industrial and commercial lighting applications.

Maxim’s new ICs meet the wide range of voltage requirements and can decrease design complexity, lower bill-of-material (BOM) costs and improve power efficiency. They offer a wide input voltage range from 5V to 36V in buck-boost LED driver applications with up to 90 percent efficiency in buck-boost mode. These LED drivers have an internal current sense option and integrated high- and low-side switching MOSFETs to reduce solution space and cost. They offer programmable on-chip PWM dimming, which allows for fine dimming control without having to use a separate microcontroller. Additionally, the MAX25610B features a 2.2MHz switching frequency option allowing for an even more compact solution. 

Key features include: High efficiency of up to 90 %; industry-Leading EMI performance,  enabling designers to pass CISPR 25 EMI specification as well as flexibility: They enable the configuration of buck, buck-boost and boost modes to support a wide variety of LEDs and topologies in high-performance exterior and front lighting.

More information:   MAX25610EVKIT# ; MAX25600EVKIT# 


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