Products, Materials + Tools | Sep 05, 2007

Macroblock Introduces High-Efficiency DC/DC Converter for High Power LED Lighting

To enhance the reliability of high power LED lighting applications, Macroblock introduces today the 1.2A constant current buck DC/DC converter, MBI6650. By means of constant current mode hysteretic PFM design, the converter answers the urgent call for traditional voltage mode DC/DC converter replacement since LED applications should be, in truth, powered by current source.

Applying constant current, the hysteretic PFM control scheme enhances system stability and optimizes excellent power efficiency up to 90% at heavy loading and even 85% at light loading. By comprising the features of adaptive output switching frequency and an audio frequency skip, both higher current and frequency can be reached as well as preventing customers from noise interruption when the MBI6650 is activated.

The MBI6650 is built with only 4 external components required and therefore successfully minimizes the PCB layout area, achieving the cost effectiveness. The design is available to operate over an input of 9 to 36V for high power LED applications. With full protection, the MBI6650 enhances power dissipation with a thermal pad in a TO-252-5L package.

The MBI6650 has achieved great improvement in the DC/DC buck converter in terms of high efficiency performance, system reliability, and power consumption reduction in the LED lighting industry for future high power LED applications. For more information, contact Macroblock at marketing@mblock.com.tw .

About Macroblock Inc.:
Macroblock was founded in June, 1999 in Hsinchu, Taiwan, and positions itself as a mixed-signal design house with special focus on the power management and opto-electronic applications, Macroblock was certified by ISO 9001:2000 in April, 2004.

Macroblock is a dedicated mixed-signal IC company and is chartered to provide solutions for opto-electronic applications. Among the wide range of opto-electronic devices, Macroblock chooses adequate devices as the axis for technology development, e.g. LED. Macroblock explores the device nature and develops the appropriate technology to outperform the advantages of the devices. With the efforts and development for years, Macroblock has successfully marketed products worldwide. For further information visit Macroblock hompage.

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