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參數(shù)資料
| 型號： | R2A20111SPW0 |
| 廠商： | Renesas Technology Corp. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Power Factor Correction Controller IC |
| 中文描述： | 功率因數(shù)校正控制芯片 |
| 文件頁數(shù)： | 36/41頁 |
| 文件大?。?/td> | 310K |
| 代理商： | R2A20111SPW0 |
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R2A20111SP/DD
REJ03F0231-0100 Rev.1.00 Mar 28, 2007
Page 36 of 40
4. PFC Hold Function
The PFC hold time can be adjusted by changing the value of the capacitor connected to the DELAY pin. The
capacitance is charged with the source current from the IC and the PFC hold function is operated until the voltage on
the DELAY pin reaches 1.2 V. Although the PFC-ON pin detects an occurrence of the momentary outage, the
detection delay time occurs because a smoothing capacitor is connected to the PFC-ON pin. This delay time depends
on the value of a resistor and the value of a smoothing capacitor which are connected to the PFC-ON pin. Therefore,
the hold time is dependent on the following:
(a) Value of the capacitor connected to the DELAY pin
(b) Current value of the DELAY pin
(c) Values of the resistor and the capacitor connected to the PFC-ON pin
Actual PFC hold time thold is expressed in the following equation (see figure 23):
R
pfc1
+ R
pfc2
R
pfc2
V
PFC-ON
= 2
4.7
V
R
T
I
src-delay
=
R
pfc1
+ R
pfc2
R
pfc1
R
pfc2
t3 =
C
pfc
In
1.2
V
I
src-delay
t2 + t3 = C
DELAY
0.79
V
V
PFC-ON
t1 =
R
pfc2
C
pfc
In
thold = t1 + t2
t3
0.4
V
2
√
2
V
AC
π
0.82
V
2
√
2
V
AC
π
√
2
V
AC
π
0.79V
0.82V
0.4V
t1
t2
t3
thold
Full-wave rectified AC
PFC-ON pin
DELAY pin
1.2V
Figure 23 PFC Hold Time
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| R2A20112 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Renesas Low Noise & High Efficiency PFC Control IC |
| R2A20112ASP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Critical Conduction Mode Interleaved PFC Control IC |
| R2A20112ASP#W0 | 制造商:Renesas Electronics Corporation 功能描述:PFC IC - Tape and Reel 制造商:Renesas Electronics Corporation 功能描述:IC PFC CTRLR 24V 16SOP |
| R2A20112DD | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Critical Conduction Mode Interleaved PFC Control IC |
| R2A20112SP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Critical Conduction Mode Interleaved PFC Control IC |
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