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參數(shù)資料
| 型號： | FA5500AP |
| 廠商： | FUJI ELECTRIC CO LTD |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1 A SWITCHING CONTROLLER, PDIP8 |
| 封裝： | DIP-8 |
| 文件頁數(shù)： | 6/26頁 |
| 文件大小： | 228K |
| 代理商： | FA5500AP |
FA5500AP/AN, FA5501AP/AN
14
Quality is our message
(2)Power factor correction operation
As described in “(1) Switching operation”, inductor
current is repeated triangular waveform. The average
current (IL1(mean)) of this repeated triangular waveform
is one half of the peak current (IL1(peak)).
Then, the inductor peak current is controlled to be
sinusoidal and the high frequency content of inductor
current is filtered. As a result, it is possible to force the
AC input current into sinusoidal waveform.
enlarged
IL1
IL1(peak)
IL1(mean)
=1/2×IL1(peak)
IL1
Iin
2×Iin(peak)
Iin(peak)
filtered the high
frequency content
by C1
Fig.3
Outline of inductor and AC input current
In an actual circuit, the internal multiplier (MUL)
controls the inductor peak current as sinusoidal
waveform.
The voltage of COMP pin, which is the output of error
amplifier (ERRAMP), is almost DC voltage in steady
state by C3. This voltage is input to the multiplier. The
other input of multiplier monitors the rectified waveform
of AC line voltage. As a result, the multiplier outputs the
sinusoidal waveform that is proportional to AC line
voltage as the product of two input voltages.
This
sinusoidal
voltage
is
input
to
the
current
comparator (CUR. comp.) as the threshold of inductor
current.
As a result, the inductor current becomes repeated
triangular waveform of which peak current envelope is
sinusoidal. The switching ripple of inductor current is
then filtered by C1 and AC input current becomes
sinusoidal waveform.
AC
L1
C1
Q1
Rs
4
3
2
1
FB
ERRAMP
COMP
CUR.comp
MUL
IS
MUL
t
V
t
V
t
V
t
V
t
I
C3
sinusoidal
Fig.4
Outline of waveform of each part
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PDF描述 |
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| 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 |
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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: |
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