參數(shù)資料
型號(hào)： 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(yè)數(shù)： 17/41頁(yè)
文件大?。?/td> 310K
代理商： R2A20111SPW0
R2A20111SP/DD
REJ03F0231-0100 Rev.1.00 Mar 28, 2007
Page 17 of 40
4. PFC-ON Pin Function
The PFC-ON pin is applied smoothing voltage of rectified AC voltage. Accordingly, the AC voltage state is detected
and each function depending on the power-supply state is operated. Details of their operation are given below. Note,
however, that the functions do not operate when VREF voltage is lower than 4 V as UVL operation and shutdown state.
14k
1
μ
720k
PFC-ON
0.2
μ
5
15
SS
0.82V
0.79V
Full-wave
rectified AC
0.47
μ
VREF
0.22
μ
25
μ
A
VREF
DELAY
3
4.7
RT
[A]
42.3
RT
[A]
VREF
1.2V
PFC-ON/OFF control
Multiplier
Gain selector
To
Power MOS FET
gate
RT
Gate Driver
+/– 1.0A(PEAK)
OUT
RT
1
9
VREF
Constant
current
circuit
Figure 4 Internal Circuits Connected to the PFC-ON Pin
4-1. Power-Supply Startup Operation
When the AC voltage is applied, the voltage on the PFC-ON pin rises and the PFC output voltage is charged to about
√
2
×
AC voltage. After the voltage on the PFC-ON pin exceeds 0.82 V, the voltage of the SS pin starts to be discharged
and PFC operation starts. Once the PFC operation starts, the PFC output voltage is boosted to the prescribed voltage.
Full-wave rectified AC
PFC-ON
SS
CAO
SS
CAO
PFC output voltage
0.82V
Figure 5 Waveform in Operations in Startup
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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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