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參數資料
| 型號： | L4981B |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩壓器 |
| 英文描述： | 2 A POWER FACTOR CONTROLLER, 115 kHz SWITCHING FREQ-MAX, PDIP20 |
| 封裝： | DIP-20 |
| 文件頁數： | 1/16頁 |
| 文件大小： | 2620K |
| 代理商： | L4981B |
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 REGULA-
TION
AVERAGE CURRENT MODE PWM FOR
MINIMUM NOISE SENSITIVITY
HIGH CURRENT BIPOLAR AND DMOS TO-
TEM POLE OUTPUT
LOW START-UP CURRENT (0.3mA TYP.)
UNDER VOLTAGE LOCKOUT WITH HYS-
TERESIS AND PROGRAMMABLE TURN ON
THRESHOLD
OVERVOLTAGE, OVERCURRENT PROTEC-
TION
PRECISE 2% ON CHIP REFERENCE EX-
TERNALLY 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-
trol functions for designing a high efficiency-mode
power supply with sinusoidal line current con-
sumption.
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-
November 2001
BLOCK DIAGRAM
ORDERING NUMBERS: L4981X (DIP20)
L4981XD (SO20)
DIP20
SO20
MULTIPOWER BCD TECHNOLOGY
1/16
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相關代理商/技術參數 |
參數描述 |
|---|---|
| L4981B | 制造商:STMicroelectronics 功能描述:POWER FACTOR CORRECTOR 4981 DIP20 |
| L4981BD | 功能描述:功率因數校正 IC Very High Power RoHS:否 制造商:Fairchild Semiconductor 開關頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| L4981BD | 制造商:STMicroelectronics 功能描述:POWER FACTOR CORRECTOR SMD 4981 |
| L4981BD013TR | 功能描述:功率因數校正 IC Very High Power RoHS:否 制造商:Fairchild Semiconductor 開關頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| L4981DIE1 | 制造商:STMicroelectronics 功能描述: |
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