Product Summary

The L4981AD is a power factor corrector. It provides the necessary features to achieve a very high power factor up to 0.99. Realized in BCD 60II technology this L4981AD contains all the control functions for designing a high efficiency-mode power supply with sinusoidal line current consumption. The L4981AD can be easily used in systems with mains voltages between 85V to 265V without any line switch.

Parametrics

L4981AD absolute maximum ratings: (1)Voltages at pins 3, 14, 7, 6, 12, 15: -0.3 to 9V; (2)Error Amplifier Voltage: -0.3 to 8.5V; (3)AC Input Current: 5mA; (4)Voltages at pin 8, 9: -0.5 to 7V; (5)Current Amplifier Volt (Isource = -20mA; Isink = 20mA): -0.3 to 8.5V; (6)Voltage at pin 17: -0.3 to 3V; (7)Voltage at pin 11, 18: -0.3 to 7V; (8)Input Sink Current: 15mA; (9)Sync. Voltage: -0.3 to 7V; (10)Voltage at pin 2: -0.3 to 5.5V; (11)Voltage at Pin 2, t = 1μs: -2V; (12)Operating Ambient Temperature: -40 to 125℃; (13)StorageTemperature: -55 to 150℃.

Features

L4981AD features: (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 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