MSC Introduces the New LED Driver MBI6650 Long Live the LED

20 FEBRUARY 2009

The new driver IC MBI6650 from Macroblock enables to be a step ahead due to the lifetime of a LED and in improving the efficiency of an application. It allows the design of a constant current source with only four external components. Due to the fact of a high efficiency of more than 90% at heavy and 85% at light load, a very small PCB can be used. This high efficiency can be reached with the new puls frequency mode (PFM). Especially at light load the efficiency was improved in comparison to a pulse-width modulation (PWM) solution. Complete protection functions like thermal shutdown, under voltage lockout, short circuit, LED open and soft start are additional advantages. The application can be supplied with a voltage between 9 an 30V DC and provides a current up to 1.2A. Due to the new PFM a good system stability will be reached, because no loop compensation is required.

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