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參數(shù)資料
| 型號(hào)： | 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)： | 18/26頁 |
| 文件大?。?/td> | 228K |
| 代理商： | FA5500AN |
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FA5500AP/AN, FA5501AP/AN
25
Quality is our message
(6)ON/OFF operation by external signal
The following methods make it possible to turn on or
off the PFC by external signal.
(i) Shut down supply voltage to Vcc pin
To shut down supply voltage to Vcc pin by external
signals leads IC’s shut down.
(ii) Lower COMP pin voltage below Vthcomp
It can stop the output pulses to lower COMP pin
voltage below Vthcomp. In this case, lower COMP pin
voltage
below
1V,
considering
temperature
characteristic and so on. An example circuit is shown
in Fig. 34.
ON/OFF
signal
R16
R17
2
COMP
Q3
C3
Fig.34
ON/OFF control circuit (1)
If the discharging current of capacitor C3 should be
limited, connect a resistor R19 as shown in Fig. 35.
The value of R19 should be selected 1k
or smaller.
In addition, check that COMP pin voltage is lowered
below 1V.
R19
ON/OFF
signal
R16
R17
2
COMP
Q3
C3
Fig.35
ON/OFF control circuit (2)
When lowering COMP pin voltage, in addition to the
output current of error amplifier, current, which flows
voltage divider connected FB pin, appears at COMP
pin through diode connected between input and output
of error amplifier. When designing and evaluating the
circuit, consider this current sufficiently, too. (See
10.
Description of Each Circuit (1) Error amplifier)
Do not use “Open/short protection at FB pin” as
ON/OFF control by lowering FB pin voltage. In this case,
there is a possibility of an abnormal rise of PFC output
voltage at the turning on and off.
相關(guān)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(guān)代理商/技術(shù)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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