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L4981B

Part Number	L4981B
Manufacturer	STMicroelectronics
Description	POWER FACTOR CORRECTOR
Published	Mar 22, 2005
Detailed Description	L4981A ® L4981B POWER FACTOR CORRECTOR CONTROL BOOST PWM UP TO 0.99P.F. LIMIT LINE CURRENT DISTORTION TO < 5% UNIVERSAL...
Datasheet	L4981B PDF File

Overview

L4981A ® L4981B POWER FACTOR CORRECTOR CONTROL BOOST PWM UP TO 0.
99P.
F.
LIMIT LINE CURRENT DISTORTION TO < 5% UNIVERSAL INPUT MAINS FEED FORWARD LINE AND LOAD REGULATION AVERAGE CURRENT MODE PWM FOR MINIMUM NOISE SENSITIVITY HIGH CURRENT BIPOLAR AND DMOS TOTEM POLE OUTPUT LOW START-UP CURRENT (0.
3mA TYP.
) UNDER VOLTAGE LOCKOUT WITH HYSTERESIS AND PROGRAMMABLE TURN ON THRESHOLD OVERVOLTAGE, OVERCURRENT PROTECTION PRECISE 2% ON CHIP REFERENCE EXTERNALLY AVAILABLE SOFT START DESCRIPTION The L4981 I.
C.
provides the necessary features to achieve a very high power factor up to 0.
99.
Realized in BCD 60II technology this power factor corrector (PFC) pre-regulator contains all the con- BLOCK DIAGRAM MULTIPOWER BCD TECHNOLOGY DIP20 SO20 ORDERING NUMBERS: L4981X (DIP20) L4981XD (SO20) trol functions for designing a high efficiency-mode power supply with sinusoidal line current consumption.
The L4981 can be easily used in systems with mains voltages between 85V to 265V without any line switc...

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