L4981AD

The L4981AD is one member of the L4981A family which is designed as the power factor corrector that can be easily used in systems with mains voltages between 85V to 265V without any line switch. To limit the number of the external components, the device integrates protections as overvoltage and overcurrent. The overcurrent level can be programmed using a simple resistor for L4981A.

Features of the L4981AD are:(1)control boost pwm up to 0.99P.F.; (2)limit line current distortion to < 5%; (3)universal input mains; (4)feed forward line and load regulation; (5)average current mode pwm for minimum noise sensitivity; (6)high current bipolar and dmos totem pole output; (7)low start-up current (0.3mA typ.); (8)under voltage lockout with hysteresis and programmable turn on threshold; (9)overvoltage, overcurrent protection; (10)precise 2% on chip reference externally available; (11)soft start.

The absolute maximum ratings of the L4981AD can be summarized as:(1)supply voltage (Icc </=50mA):selflimit V;(2)gate driv. output peak current (t=1 ms):2 A;(3)gate driv. output voltage t=0.1ms:-1 V;(4)voltages at pins 3, 14, 7, 6, 12, 15:-0.3 to 9 V;(5)storage temperature:-55 to 150 °C;(6)operating ambient temperature:-40 to 125 °C;(7)power dissipation at Tamb=70°C (DIP20):1 W;(8)power dissipation at Tamb=70°C (SO20):0.6 W;(9)input sink current: 15 mA. If you want to know more information such as the electrical characteristics about the L4981AD, please download the datasheet in www.seekic.com or www.chinaicmart.com .