LM3445-120VSMEV: 350mA @ 45V Max, 110V Triac Dimming LED Driver

LM3445-120VSMEV has been laid out to fit inside an Edison socket and uses a 0.031" thick PCB and utilizes a valley fill triac holding current circuit.

The demonstration board included in this shipment converts 90VAC to 135VAC input, and drives six, to thirteen series connected LED’s at 350 mA average current. The LM3445 switching frequency ranges from about 70 kHz with six series connected LEDS, to about 110 kHz with thirteen series connected LEDs.

The switching frequency can be modified to optimize performance, please refer to the LM3445 datasheet for details. This is a four-layer board using the bottom and top layer for component placement. The demonstration board can be modified to adjust the LED forward current, the number of series connected LEDs and switching frequency.

The board is currently set up to drive six to thirteen series connected LEDs, but the evaluation board may be modified to accept fewer series LEDs. Refer to the LM3445 datasheet for further explanation.