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| 型號： | L6563_07 |
| 廠商： | 意法半導體 |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Advanced transition-mode PFC controller |
| 中文描述： | 先進的過渡模式PFC控制器 |
| 文件頁數(shù)： | 29/39頁 |
| 文件大?。?/td> | 565K |
| 代理商： | L6563_07 |
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L6563 - L6563A
Application information
29/39
The third communication line is the PWM_STOP pin (pin 9), which works in conjunction with
the RUN pin (pin 10). The purpose of the PWM_STOP pin is to inhibit the PWM activity of
both the PFC stage and the cascaded DC-DC converter. The pin is an open collector,
normally open, that goes low if the device is disabled by a voltage lower than 0.52V on the
RUN pin. It is important to point out that this function works correctly in systems where the
PFC stage is the master and the cascaded DC-DC converter is the slave or, in other words,
where the PFC stage starts first, powers both controllers and enables/disables the operation
of the DC-DC stage.
This function is quite flexible and can be used in different ways. In systems comprising an
auxiliary converter and a main converter (e.g. desktop PC's silver box or hi-end LCD-TV),
where the auxiliary converter also powers the controllers of the main converter, the pin RUN
can be used to start and stop the main converter. In the simplest case, to enable/disable the
PWM controller the PWM_STOP pin can be connected to either the output of the error
amplifier (
Figure 44
a
) or, if the chip is provided with it, to its soft-start pin (
Figure 44
b
). The
use of the soft-start pin allows the designer to delay the start-up of the DC-DC stage with
respect to that of the PFC stage, which is often desired. An underlying assumption in order
for that to work properly is that the UVLO thresholds of the PWM controller are certainly
higher than those of the L6563/A.
Figure 43. Interface circuits that let DC-DC converter’s controller IC disable the L6563/A at light
load
L5991/A
ST-BY
4
16
27
k
Vref
L6563
PFC_OK
7
100
k
150
k
150
k
47
k
100 nF
BC547
BC547
BC557
L5991/A
ST-BY
4
16
27
k
Vref
L6563
Vcc
14
100
k
150
k
150
k
15
k
100 nF
BC557
BC547
BC557
100 nF
Supply_Bus
L6668
PFC_STOP
14
16
Vcc
10 k
BC557
2.2 k
L6563
L6563A
Vcc
14
8.2 V
L6563
L6563A
(10)
(RUN)
PFC_OK
BC547
L6668
14 PFC_STOP
7
2.2 k
8
VREF
100 k
L6599
PFC_STOP
14
L6563
L6563A
(RUN)
PFC_OK
7
(10)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L6563A | ADVANCED TRANSITION-MODE PFC CONTROLLER |
| L6563ATR | ADVANCED TRANSITION-MODE PFC CONTROLLER |
| L6563 | ADVANCED TRANSITION-MODE PFC CONTROLLER |
| L6563TR | ADVANCED TRANSITION-MODE PFC CONTROLLER |
| L6566A | Multi-mode controller for SMPS with PFC front-end |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6563A | 功能描述:功率因數(shù)校正 IC Advanced transition mode PFC controller 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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| L6563ATR | 功能描述:功率因數(shù)校正 IC Advanced transition mode PFC controller 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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| L6563CYTR | 制造商:ST 功能描述:ADVANCED TRANSITION-MODE PFC CONTROLLER |
| L6563H | 功能描述:功率因數(shù)校正 IC High voltage start Transition-mode PFC 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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| L6563HTR | 功能描述:功率因數(shù)校正 IC 700V 6mA Start-Up Transition-Mode PFC 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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
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