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參數(shù)資料
| 型號(hào)： | F3D480T20A |
| 廠商： | Vicor Corporation |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | VI Chip PFM Power Factor Module |
| 中文描述： | 六烤瓷芯片功率因數(shù)模塊 |
| 文件頁(yè)數(shù)： | 6/14頁(yè) |
| 文件大?。?/td> | 457K |
| 代理商： | F3D480T20A |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)當(dāng)前第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)
Vicor Corporation
Tel: 800-735-6200
vicorpower.com
Power Factor Module
F3D480T20A
Rev. 1.0
Page 6 of 14
PRELIMINARY
Figure 5
— The PRM with PFC
+OUT
–OUT
To
External Cap
and
Load
External Cap
DC+
ZVS Control
μ
Controller
From VTM
Figure 6
— Functional block diagram of the PFM
Proprietary Analog
Buck-Boost Control
+IN
–IN
+OUT
–OUT
Frequency
Lock/Control
T2
T2
T2
T2
Q1
Q2
Q3
Q4
1
2
2
1
2
1
1
2
T1
T1
Q5
Q6
T2
T2
1 2
2 1
μ
P
SG
SC
1 nF
30.1 k
Ω
V
REF
1.25 V
1.25 V
Full Scale
BV
PC
PR
PRM with PFC
The output of the VTM drives the PFC/PRM. The PFC/PRM (Figure 5 ) is
a microprocessor controlled, high-efficiency, zero-voltage switching
buck-boost regulator providing output voltage regulation and input
current shaping. The input voltage, isolated and adaptively
transformed by the VTM, and the PRM’s output voltage and output
current are sampled by the microprocessor. The processor uses a digital
algorithm to develop a control signal used to simultaneously regulate
the output voltage and shape the module input current, providing
harmonic current reduction. This control signal is fed to the switch
management ASIC. This provides proper switch timing, maintaining
zero-voltage switching under all operating conditions. Energy storage
is accomplished outside the PFM by means of an output capacitor that
may be sized to meet the user’s hold up requirements.
PFM Theory of Operation cont.
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