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L497D1, L4981, L4981A

Table of contents:
Info of L497D1
Info of L4981
Info of L4981A

L497D1, L4981, L4981A Selling Leads, Datasheet

MFG:STMicroelectronics Category:Integrated Circuits (ICs) Package Cooled:SOP-16 D/C:06+

L497D1, L4981, L4981A Datasheet download

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Part Number: L497D1

Category: Integrated Circuits (ICs)

MFG: STMicroelectronics

Package Cooled: SOP-16

D/C: 06+

Description: IC PFC CTRLR AVERAGE CURR 20DIP

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L497D1 Parameters

Technical/Catalog Information	L497D1
Vendor	STMicroelectronics
Category	Integrated Circuits (ICs)
Applications	Automotive
Current - Supply	18mA
Voltage - Supply	3 V ~ 8.2 V
Package / Case	16-SOIC (3.9mm Width)
Packaging	Tube
Operating Temperature	-40°C ~ 125°C
Drawing Number	*
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	L497D1 L497D1

L4981A Parameters

Technical/Catalog Information	L4981A
Vendor	STMicroelectronics
Category	Integrated Circuits (ICs)
Packaging	Tube
Package / Case	20-DIP (300 mil)
Voltage - Supply	14.5 V ~ 19.5V
Mode	Average Current
Frequency - Switching	100kHz
Current - Startup	100A
Operating Temperature	-40°C ~ 125°C
Drawing Number	*
Lead Free Status	Contains Lead
RoHS Status	RoHS Non-Compliant
Other Names	L4981A L4981A 497 3634 ND 4973634ND 497-3634

L4981A General 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 control 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 switch. This new PFC offers the possibility to work at fixed frequency (L4981A) or modulated frequency (L4981B) optimizing the size of the in-put filter; both the operating frequency modes working with an average current mode PWM controller,maintaining sinusoidal line current without slope compensation.

Besides power MOSFET gate driver, precise voltage reference (externally available), error amplifier,undervoltage lockout, current sense and the soft start are included. To limit the number of the external components, the device integrates protections as overvoltage and overcurrent. The overcurrent level can be programmed using a simple resistor for L4981A. For a better precision and for L4981B an external divider must be use

L4981A Maximum Ratings

Symbol	Pin	Parameter		Value	Unit
V_CC	19	Supply Voltage (I_CC350mA) (*)		selflimit	V
I_GDRV	20	Gate driv. output peak current (t = 1s)	SINK SOURCE	2	A
I_GDRV		Gate driv. output peak current (t = 1s)	SINK SOURCE	1.5	A
V_GDRV		Gate driv. output voltage t = 0.1s		-1	V
		Voltages at pins 3, 14, 7, 6, 12, 15		-0.3to9	V
V_VA-OUT	13	Error Amplifier Voltage		-0.3to8.5	V
I_AC	4	AC Input Current		5	mA
		Voltages at pin 8, 9		-0.5to7	V
V_CA-OUT	5	Current Amplifier Volt. (Isource = -20mA; Isink = 20mA)		-0.3to8.5	V
V_ROSC	17	Voltage at pin 17		-0.3to3	V
	11,18	Voltage at pin 11, 18		-0.3to7	V
I_COSC	18	Input Sink Current		15	mA
I_FREQ-MOD	16	Frequency Modulation Sink Current (L4981B)		5	mA
VSYNC	16	Sync. Voltage (L4981A)		-0.3to7	V
V_IPK	2	Voltage at pin 2 Voltage at Pin 2 t = 1s		-0.3to5.5 -2	V V
P_tot		Power Dissipation at T_amb = 70°C (DIP20)		1	W
P_tot		Power Dissipation at T_amb = 70°C (SO20)		0.6	W
T_op		Operating Ambient Temperature		-40to125	°C
T_stg		StorageTemperature		-55to150	°C

(*) Maximum package power dissipation limits must be observed.

L4981A Features

·CONTROL BOOST PWMUP TO 0.99P.F.
·LIMITLINE CURRENT DISTORTIONTO < 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

L4981A Connection Diagram

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