LM3450

The LM3450 is a power factor controller (PFC) with separate phase dimming decoder. It is ideal for implementing a dimmable off-line LED driver for 10-100W loads.

The features of LM3450 can be summarized as:(1)Critical conduction mode PFC; (2)Over-voltage protection; (3)Feedback short circuit protection; (4)70:1 PWM decoded from phase dimmer; (5)Analog dimming; (6)Programmable dimming range; (7)Digital angle and dimmer detection; (8)Dynamic holding current; (9)Smooth dimming transitions; (10)Low power operation; (11)Start-up pre-regulator bias; (12)Precision voltage reference.

The absolute maximum ratings of LM3450 are:(1)VCC, HOLD, DIM, BIAS:-0.3V to 25.0V; (2)HOLD Power:250 mW Continuous; (3)BIAS Current:5.0mA Continuous; (4)ZCD Current:+/- 10mA; (5)COMP, FB, VAC, FLT1, FLT2,VREF, CS, VADJ:-0.3V to 7.0V; (6)ISEN:-7.0V to 7.0V; (7)GATE:-0.3V to 18V Continuous,-2.5V for 100ns,20.5V for 100ns,-1mA to +1mA Continuous; (8)Continuous Power Dissipation:Internally Limited; (9)Maximum Junction Temperature:Internally Limited; (10)Storage Temperature Range:-65°C to +150°C; (11)Maximum Lead Temperature (Solder and Reflow):260°C; (12)ESD Susceptibility:HBM..2kV,MM..200V,FICDM..750V.

If you want to know more information such as the electrical characteristics about the LM3450, please download the datasheet in www.seekic.com or www.chinaicmart.com .