- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄67412 > FA5500AN (FUJI ELECTRIC CO LTD) 1 A SWITCHING CONTROLLER, PDSO8 PDF資料下載
參數(shù)資料
| 型號： | FA5500AN |
| 廠商： | FUJI ELECTRIC CO LTD |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1 A SWITCHING CONTROLLER, PDSO8 |
| 封裝： | SO-8 |
| 文件頁數(shù)： | 9/26頁 |
| 文件大?。?/td> | 228K |
| 代理商： | FA5500AN |
FA5500AP/AN, FA5501AP/AN
17
Quality is our message
A current out of or into the ZCD pin should be
within 3mA so that the IC will operate normally.
On the other hand, if the current out of or into the
ZCD pin is too small, unstable operation may occur.
Therefore, current limiting resistor of R5 should be
below 47k
.
While MOSFET is on, negative voltage is generated
in the auxiliary winding. A current flows out of the
clamp circuit and the ZCD pin voltage is clamped to
0.6V (typ.). While MOSFET is off, positive voltage is
generated in the auxiliary winding. A current flows into
the clamp circuit and the ZCD pin voltage is clamped to
7.6V (typ.).
Clamp
5
sub
R5
ZCD
ZCD.comp
0.6V
Q1 : ON
Clamp circuit
current
Fig.10
Clamp circuit of ZCD pin(1)
Clamp
5
sub
R5
ZCD
ZCD.comp
7.6V
Q1 : OFF
Clamp circuit
current
Fig.11
Clamp circuit of ZCD pin(2)
(7)Compensation circuit for light load
If the output of multiplier, which determines the
threshold of current comparator, does not have offset
voltage,
the
input
current
to
the
converter
is
approximately zero under condition that the PFC
converter operates in no load. But an actual multiplier
may have offset voltage. If the offset voltage is positive,
the input current, which corresponds to the offset
voltage, flows into the converter even when the PFC
converter operates in no load. In this case, the PFC
output voltage rises abnormally because of too much
input current.
To avoid these, this IC has an automatic offset
correction circuit (AOC) for light load. The output
voltage of error amplifier is approximately 2V or higher
in normal operation. When the output voltage of error
amplifier drops below 2V, AOC circuit operates.
If the output of multiplier has a positive offset, the
output voltage of error amplifier falls below 2V in the
case that the PFC converter operates in no load or light
load. Then, the offset voltage is corrected in the current
comparator by AOC circuit. Because of this operation,
even in the no load or light load condition, the PFC
output voltage does not rise abnormally, but is always
kept constant. The amount of correction changes
linearly according to the output of error amplifier so that
the operation can be made stable.
相關PDF資料 |
PDF描述 |
|---|---|
| FA5500AP | 1 A SWITCHING CONTROLLER, PDIP8 |
| FA5516N | 1 A SWITCHING CONTROLLER, 143 kHz SWITCHING FREQ-MAX, PDSO8 |
| FA5517N | 1 A SWITCHING CONTROLLER, 110 kHz SWITCHING FREQ-MAX, PDSO8 |
| FA5516P | 1 A SWITCHING CONTROLLER, 143 kHz SWITCHING FREQ-MAX, PDIP8 |
| FA5517P | 1 A SWITCHING CONTROLLER, 110 kHz SWITCHING FREQ-MAX, PDIP8 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| FA5500AP/AN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| FA550-10PAK | 制造商:Black Box Corporation 功能描述:DB15 Male Transceiver Connector Kit, 10-Pack |
| FA5501AP/AN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| FA5502 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:FA5502P/M is a control IC for a power factor correction system. |
| FA5502M-H1 | 制造商:Fuji Electric 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復。