Product Summary

The L4981AD I.C. provides the necessary features to achieve a very high power fact or up to 0.99.The L4981AD can be easily used in systems with mains voltages between 85V to 265V without any line switch. The over current level can be programme dusing a simple resistor for L4981AD.

Parametrics

L4981AD absolute maximum ratings: (1) Supply Voltage (IC≤50mA) VCC: selflimit; (2) Gate driv.output peak current (t=1 s) IGDRV: 2A; (3) Gate driv. output voltage t=0.1μS VGDRV: -1V; (4) Error Amplifier Voltage: -0.3 to 8.5V; (5) AC Input Voltage: 5mA; (6) Current Amplifier Volt.(Isource=-20mA;Isink=20mA) : -0.3 to 8.5V; (7) Voltageat pin 17 VROSC: -0.3 to 0.3V; (8) Input Sink Current ICOSC: 15mA; (9) Power Dissipationat T =70°C (DIP20) Ptot: 1W, Power Dissipation at Tamb=70°C (SO20) : 0.6W; (10) Operating Ambient Temperature: -40 to +125°C; (11) Storage Temperature Tstg: -55 to 150°C.

Features

L4981AD features: (1) control boost PWM up to 0.99PF; (2) limit line current distortion<5%; (3) universal input mains; (4) feed for ward line and load regulation; (5) average current mode PWM for minimum nosie sensitivity; (6) low start-up current ( 0.3mA TYP) ; (7) over voltage, over current protection; (8) soft start.

Diagrams

L4981AD Block Diagram"

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
L4981AD
L4981AD
STMicroelectronics
Power Factor Correction ICs Very High Power
Data Sheet
0-1: $1.94
1-10: $1.88
10-100: $1.72
100-250: $1.54
L4981AD013TR
L4981AD013TR
STMicroelectronics
Power Factor Correction ICs Very High Power
Data Sheet
0-1: $2.62
1-10: $2.11
10-100: $1.84
100-250: $1.54