參數(shù)資料
型號(hào): MC33262DG
廠商: ON Semiconductor
文件頁(yè)數(shù): 14/19頁(yè)
文件大?。?/td> 394K
描述: IC PFC CONTROLLER CRM 8SOIC
標(biāo)準(zhǔn)包裝: 98
模式: 臨界傳導(dǎo)(CRM)
電流 - 啟動(dòng): 250µA
電源電壓: 12 V ~ 28 V
工作溫度: -40°C ~ 105°C
安裝類型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 8-SOICN
包裝: 管件
MC34262, MC33262
http://onsemi.com
14
Figure 23. Power Factor Corrected Input Waveforms
(Figure 21 Circuit)
Figure 24. Output Voltage Startup Overshoot
(Figure 21 Circuit)
Input = 115 VAC, Output = 175 W
Input = 230 VAC, Output = 175 W
2.0 ms/DIV
2.0 ms/DIV
Without Overvoltage Comparator
200 ms/DIV
200 ms/DIV
500 V
400 V
0 V
432 V
400 V
0 V
26%
8%
With Overvoltage Comparator
Figure 25. Power Factor Test SetUp
0.005
1.0
0.005
HARM
FREQ
11
LO
0.1
O
I
T
0 to 270 Vac
Output to Power
Factor
Controller Circuit
Earth
Line
Neutral
115 Vac
Input
RFI Test Filter
Autoformer
2X Step-Up
Isolation
Transformer
LO
HI
HI
V
A
Ainst
Acf
Vcf
Arms
Vrms
PF
VA
W
13
9
7
5
3
2
1
0
Voltech
AC POWER ANALYZER
PM 1000
An RFI filter is required for best performance when connecting the preconverter directly to the ac line. The filter attenuates
the level of high frequency switching that appears on the ac line current waveform. Figures 20 and 21 work well with
commercially available two stage filters such as the Delta Electronics 03DPCG5. Shown above is a single stage test filter
that can easily be constructed with four ac line rated capacitors and a commonmode transformer. Coilcraft CMT3282
was used to test Figures 20 and 21. It has a minimum inductance of 28 mH and a maximum current rating of 2.0 A. Coilcraft
CMT4179 was used to test Figure 22. It has a minimum inductance of 17 mH and a maximum current rating of 9.0 A. Circuit
conversion efficiency h (%) was calculated without the power loss of the RFI filter.
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