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L4981B

Power Factor Correction ICs Very High Power

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SeekIC No. : 00540733 Detail

L4981B: Power Factor Correction ICs Very High Power

L4981B Data Sheet

floor Price/Ceiling Price

US $ 1.58~2.39 / Piece | Get Latest Price
Part Number:
L4981B
Mfg:
STMicroelectronics
Supply Ability:
5000

Price Break

  • Qty
  • 0~1
  • 1~10
  • 10~100
  • 100~250
  • Unit Price
  • $2.39
  • $1.92
  • $1.75
  • $1.58
  • Processing time
  • 15 Days
  • 15 Days
  • 15 Days
  • 15 Days
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Upload time: 2024/11/21

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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 InformationL4981B
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 StatusLead Free
RoHS StatusRoHS Compliant
Other Names L4981B
L4981B
497 5337 5 ND
49753375ND
497-5337-5



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