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參數(shù)資料
| 型號： | L4981XD |
| 廠商： | 意法半導體 |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | POWER FACTOR CORRECTOR |
| 中文描述： | 功率因數(shù)校正 |
| 文件頁數(shù)： | 1/17頁 |
| 文件大?。?/td> | 228K |
| 代理商： | L4981XD |
L4981A
L4981B
POWER FACTOR CORRECTOR
CONTROL BOOST PWMUP TO 0.99P.F.
LIMITLINE CURRENT DISTORTIONTO < 5%
UNIVERSALINPUT MAINS
FEED FORWARD LINE AND LOAD REGULA-
TION
AVERAGE CURRENT
MINIMUM NOISE SENSITIVITY
HIGH CURRENT BIPOLAR AND DMOS TO-
TEM POLEOUTPUT
LOW START-UPCURRENT (0.3mATYP.)
UNDER VOLTAGE LOCKOUT WITH HYS-
TERESIS AND PROGRAMMABLE TURN ON
THRESHOLD
OVERVOLTAGE, OVERCURRENT PROTEC-
TION
PRECISE 2% ON CHIP REFERENCE EX-
TERNALLYAVAILABLE
SOFTSTART
MODE
PWM FOR
DESCRIPTION
The L4981 I.C. provides the necessary features
to achievea veryhigh powerfactor up to 0.99.
Realized in BCD 60II technologythis power factor
corrector (PFC) pre-regulatorcontains all the con-
trol functionsfor designinga highefficiency-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-
September 1998
BLOCK DIAGRAM
ORDERING NUMBERS:
L4981X (DIP20)
L4981XD (SO20)
DIP20
SO20
MULTIPOWER BCD TECHNOLOGY
1/17
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| L4987CXX30 | VERY LOW DROP VOLTAGE REGULATOS WITH INHIBIT AND DROPOUT CONTROL FLAG |
| L4987CXX33 | VERY LOW DROP VOLTAGE REGULATOS WITH INHIBIT AND DROPOUT CONTROL FLAG |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| L4984D | 功能描述:功率因數(shù)校正 IC Current Mode PFC CCM Line Modulated Bi 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 |
| L4984DTR | 功能描述:功率因數(shù)校正 IC Current Mode PFC CCM Line Modulated Bi 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 |
| L4985 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| L4985D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Mode SMPS Controller |
| L4987 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT AND DROPOUT CONTROL FLAG |
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