LED driver reducerer EMI i low cost lamper
Ny low-cost LED driver fra Diodes kontrollere stige- og faldtider og reducerer dermed EMI-udstrålingen (in english).
Switching at a frequency of up to 1MHz and ensuring closely controlledrise and fall times, the AL8807 buck LED driver from Diodes Incorporated has
been purpose designed to reduce EMI issues in the lower cost MR16 LED lamp
market. To achieve required higher output powers, the driver can operate at
input voltages between 6V to 30V and provide up to 8 series connected LEDs with
a constant 1A current.
The driver's current accuracy of ±5%, means it
will meet the requirements of most general low voltage lighting applications and
lead to an improvement in inter-lamp luminance matching in 3W LED lighting
systems. The driver is up to 96% efficient and its output current is simple to
set using a single external resistor.
Dimming control is via the
application of either a DC voltage or PWM signal on the driver's Control input,
which also protects against any over-driving of the LED current. The AL8807's
1000:1 PWM dimming ratio and dc dimming range from 16% to 100%, provide users
with flexible and wide-ranging lamp brightness control.
small footprint SOT25 package and soon available in the MSOP-8EP package.,
