LED driver cuts emi in low cost lamps claims Diodes
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Diodes has announced a new led driver which it claims reduces emi in low cost lamps.
The AL8807 buck led driver switches at a frequency of up to 1MHz and is designed to closely control rise and fall times. According to Diodes, the driver reduces emi issues in the lower cost MR16 led lamp market and can operate at input voltages between 6 to 30V. It provides up to eight series connected leds with a constant 1A current. Diodes adds that the driver's current accuracy is +/-5%, resulting in an improvement in inter lamp luminance matching 3W led lighting systems. The driver is said to be up to 96% efficient, with an output current that can be set using a single external resistor.
Dimming control is achievable by the application of either a dc voltage or pwm signal on the driver's control unit, which is designed to protect against any over driving of the dc current. It has a 1000:1 pwm dimming range and dc dimming range from 16 to 100%.
