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...