Position: Home  > All Categories> Integrated Circuits (ICs) > L4981A

L4981A

Power Factor Correction ICs Very High Power

product image

L4981A Picture
See larger image
SeekIC No. : 00540771 Detail

L4981A: Power Factor Correction ICs Very High Power

L4981A Data Sheet

floor Price/Ceiling Price

US $ 1.54~1.94 / Piece | Get Latest Price
Part Number:
L4981A
Mfg:
STMicroelectronics
Supply Ability:
5000

Price Break

  • Qty
  • 0~1
  • 1~10
  • 10~100
  • 100~250
  • Unit Price
  • $1.94
  • $1.88
  • $1.72
  • $1.54
  • Processing time
  • 15 Days
  • 15 Days
  • 15 Days
  • 15 Days
View more price & deliveries
Total Cost: $ 0.00

SeekIC Buyer Protection PLUS - newly updated for 2013!

  • Escrow Protection.
  • Guaranteed refunds.
  • Secure payments.
  • Learn more >>

Month Sales

268 Transactions

Rating

evaluate  (4.8 stars)

Upload time: 2024/11/21

add to my favourite

Payment Methods

All payment methods are secure and covered by SeekIC Buyer Protection PLUS.

Notice: When you place an order, your payment is made to SeekIC and not to your seller. SeekIC only pays the seller after confirming you have received your order. We will also never share your payment details with your seller.
Product Details

Quick Details

Switching Frequency : 115 KHz Maximum Operating Temperature : + 125 C
Mounting Style : Through Hole Package / Case : PDIP-20
Packaging : Tube    

Description

Maximum Power Dissipation :
Packaging : Tube
Maximum Operating Temperature : + 125 C
Mounting Style : Through Hole
Switching Frequency : 115 KHz
Package / Case : PDIP-20


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


Pinout

Connection Diagram


Specifications

Symbol
Pin
Parameter
Value
Unit
VCC
19
 Supply Voltage (ICC350mA) (*)
selflimit
V
IGDRV
20
 Gate driv. output peak current (t = 1s)
SINK
SOURCE
2
A
1.5
A
VGDRV
 Gate driv. output voltage t = 0.1s
-1
V
Voltages at pins 3, 14, 7, 6, 12, 15
-0.3to9
V
VVA-OUT
13
 Error Amplifier Voltage
-0.3to8.5
V
IAC
4
 AC Input Current
5
mA
Voltages at pin 8, 9
-0.5to7
V
VCA-OUT
5
 Current Amplifier Volt. (Isource = -20mA; Isink = 20mA)
-0.3to8.5
V
VROSC
17
 Voltage at pin 17
-0.3to3
V
11,18
 Voltage at pin 11, 18
-0.3to7
V
ICOSC
18
 Input Sink Current
15
mA
IFREQ-MOD
16
 Frequency Modulation Sink Current (L4981B)
5
mA
VSYNC
16
 Sync. Voltage (L4981A)
-0.3to7
V
VIPK
2
 Voltage at pin 2
Voltage at Pin 2 t = 1s
-0.3to5.5
-2
V
V
Ptot
Power Dissipation at Tamb = 70°C (DIP20)
1
W
Power Dissipation at Tamb = 70°C (SO20)
0.6
W
Top
Operating Ambient Temperature
-40to125
°C
Tstg
StorageTemperature
-55to150
°C
(*) Maximum package power dissipation limits must be observed.


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




Parameters:

Technical/Catalog InformationL4981A
VendorSTMicroelectronics
CategoryIntegrated Circuits (ICs)
PackagingTube
Package / Case20-DIP (300 mil)
Voltage - Supply14.5 V ~ 19.5V
ModeAverage Current
Frequency - Switching100kHz
Current - Startup100A
Operating Temperature-40°C ~ 125°C
Drawing Number*
Lead Free StatusContains Lead
RoHS StatusRoHS Non-Compliant
Other Names L4981A
L4981A
497 3634 ND
4973634ND
497-3634



Customers Who Bought This Item Also Bought

Margin,quality,low-cost products with low minimum orders. Secure your online payments with SeekIC Buyer Protection.
You may also be interested in :
RF and RFID
X3C26P1-30S
1P620S
Discrete Semiconductor Products
T508N12TOF
MUR20040
Kits
IT243
UVSC-110-4E1
Optoelectronics
SFH7770
TLP423J
Industrial Controls, Meters
SGDM-15ADA
41AA1600E
Hardware, Fasteners, Accessories
MF-A02
LMS700KF07
View more