LED drivers from Maxim champion EMI performance
Compact LED drivers from Maxim Integrated, the MAX25610A and MAX25610B can be used in high-performance automotive lighting applications for a more efficient method for driving high-brightness LEDs (HBLEDs), says the company.
The synchronous buck, buck-boost LED drivers/DC-DC converters are claimed to have industry-leading EMI performance, without compromising on efficiency and size. The ICs drive up to eight HBLEDs directly from the automotive battery and integrate many external components to save on bill of materials, costs and space, for space-constrained automotive lighting systems as well as industrial and commercial lighting applications.
The automotive industry is transitioning to all-LED lighting, which poses challenges in improving efficiency, simplifying designs and reducing system costs, while passing strict EMI requirements. The EMI performance enables designers to pass CISPR 25 EMI specification, notes Maxim.
Designers may employ multiple components in systems to pass EMI specifications and compromise on space and system efficiency while also addressing thermal issues and high costs, says Maxim. Now, the MAX25610A and MAX25610B LED drivers, can meet the wide range of voltage requirements and can decrease design complexity. They offer a wide input voltage range from 5.0 to 36V in buck-boost LED driver applications with up to 90 per cent 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 pulse width modulation (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, advises Maxim.
The MAX25610A and MAX25610B LED drivers integrate two MOSFETs (high- and low-side switching) and are available in a 5.0 x 5.0mm TQFN .
Flexibility: Enables configuration of buck, buck-boost and boost modes to support a wide variety of LEDs and topologies in high-performance exterior and front lighting
Maxim also offers the MAX25600, a 60V, synchronous, high-voltage, four-switch buck-boost LED controller that shifts seamlessly between buck, buck-boost and boost modes. This IC is intended for driving changing LED loads in high-power automotive, commercial and industrial lighting applications.