EVAL4981A: 360W @ 400V, 88 ~ 264 VAC

Summary

The L4981 integrated circuit is a continous mode average current controller with several specific functions for active power factor correction. It can operate in high quality, medium/high power conversion range and provides all the necessary features to achieve a very high power factor, up to 0.99. Thanks to the BCD technology used, operative switching frequency higher than 200kHz can be used.

The L4981 can be used in systems with universal input mains voltage without any line switch.

This new PFC offers the alternative of synchronization working at fixed frequency (L4981A), or working in modulated frequency (L4981B) to optimize the size of the input filter. Both devices control the conversion in average current mode PWM to maintain a sinusoidal line current without slope compensation.

Specifications

Manufacturer	STMicroelectronics
Category	Power Management
Sub-Category	Power Factor Correction
Eval Board Part Number	497-5523-ND
Eval Board Supplier	STMicroelectronics
Eval Board	Board not Stocked
Output Power	360 W
Voltage In	88 ~ 264 VAC
Voltage Out	400 V
THD @ Conditions	6.4% @ 220 Vin 2.2% @ 110 Vin
Efficiency @ Conditions	>96%, 220V in, 412V @ 381 W >94%, 110V in, 406V @ 370 W
Features	Over Current Protection Over Voltage Protection Soft Start Synchronizable Under Voltage Protection, Brown-Out
Switching Frequency	100 kHz
Application / Target Market
Component Count + Extras	54 + 3
Design Author	STMicroelectronics
Main I.C. Base Part	L4981
Date Created By Author
Date Added To Library	2011-03