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參數(shù)資料
| 型號： | L4981 |
| 廠商： | 意法半導(dǎo)體 |
| 元件分類： | 基準(zhǔn)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)： | 12/17頁 |
| 文件大?。?/td> | 228K |
| 代理商： | L4981 |
Figure 19:
200WEvaluation Board Circuit.
T= primary: 75 turns of litz wire 20 x 32AWG (0.2mm)
secondary: 8 turns of # 27AWG (0.15mm)
core: B1ET3411A THOMSON - CSF
gap: 1.4mm for a total primary inductance of 0.7mH
f
sw
= 100kHz; V
O
= 400V;
P
O
= 200W
NOTE:
Start Up Circuit
Usuallythe V
CC
capacitor(C11infig.19)can bechargedbya resistor
drawing current from the rectified mains. In the evaluation board
instead the start up circuit composed by (Q2+R19+R15+Dz) has
been designed to perform a fast and effective supply in all the
conditions. Once that the L4981A/B has started, the reference
voltage available at pin 6 by R20 and Q3, ensures Q2 to be turned
off.
ProgrammableUnder voltage Lockout
The PCB allows to insert a couple of resistor (R22, R23) to modify
the threshold inputvoltage. Please refer to fig. 16 and table1.
L4981A - L4981B
12/17
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L4981A | POWER FACTOR CORRECTOR |
| L4981B | POWER FACTOR CORRECTOR |
| L4981X | POWER FACTOR CORRECTOR |
| L4981XD | POWER FACTOR CORRECTOR |
| L4985 | |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L4981A | 功能描述:功率因數(shù)校正 IC Very High Power RoHS:否 制造商:Fairchild Semiconductor 開關(guān)頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| L4981A | 制造商:STMicroelectronics 功能描述:POWER FACTOR CORRECTOR 4981 DIP20 |
| L4981A_01 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:POWER FACTOR CORRECTOR |
| L4981AD | 功能描述:功率因數(shù)校正 IC Very High Power RoHS:否 制造商:Fairchild Semiconductor 開關(guān)頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| L4981AD | 制造商:STMicroelectronics 功能描述:POWER SUPPLY IC |
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