參數(shù)資料
型號(hào)： SSL2102
廠商： NXP Semiconductors N.V.
中文描述： Demoboard description SSL2102 12W-230V Triac dimmable fly-back demonstration board The SSL2102 is a Switched Mode Power Supply (SMPS) controller IC that operates in combination with a phase cut dimmer directly from rectified mains. It is designed to drive LED devices. Our SSL2102 demonstration boards are suitable for 120 V or 230 V mains.
文件頁(yè)數(shù)： 16/29頁(yè)
文件大?。?/td> 797K
代理商： SSL2102
AN10876
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Application note
Rev. 2 — 23 June 2011
16 of 29
NXP Semiconductors
AN10876
Buck converter for SSL applications
Table 4.
Ratio
0.05
0.2
0.5.
A higher converter ratio will also give more high order harmonics, as well as increased
core and proximity losses in the transformer. These harmonics must be filtered in order to
be EMC compliant and this requires either more or improved input and output filtering.
The resistive losses depend on the peak currents in the wires. They can be estimated by
simply calculating the wire resistance, and calculating the average power dissipation in
the wire. As an approximation, the current density should be between 300 and 500
Circular Mills(CM)/Amp.
Table 5
shows wire sizes related to current:
Table 5.
Diameter (mm)
4.7 V
cc
generation dimensioning.
When the auxiliary winding is also used for V
cc
generation, the following aspects must be
taken into account:
At startup, the converter is not working and no voltage is generated in the auxiliary
winding. There must always be a startup circuit present that is capable of providing
sufficient current to the V
cc
for the first few cycles.
The voltage on the auxiliary winding depends on the output voltage. As a result, worst
case situations should be used to calculate whether minimum power demands are
met and if dissipation and current values are within limits.
Voltage is only present during part of the cycle. The average current flowing towards
the V
cc
of the IC should be sufficient to drive the IC. Consequently, the peak current
flowing should be higher than the average current that is required.
Harmonics amplitude coefficients
1st
2nd
0.334
0.165
0.372
0.151
0.405
0
3rd
0.108
0.067
0.045
4th
0.078
0.023
0
5th
0.060
0
0.016
6th
0.048
0.010
0
7th
0.039
0.003
0.008
Wire selection table
Nearest AWG
Area (mm
2
)
Area
(CM)
15
62
97
154
195
248
486
781
992
2294
3782
DC Res.
(Ohm/m)
2.195
0.549
0.351
0.221
0.174
0.137
0.070
0.044
0.034
0.015
0.009
Typical Current l
l
(A)
0.04
0.15
0.24
0.38
0.49
0.62
1.22
1.95
2.48
5.73
9.45
0.1
0.2
0.25
0.315
0.355
0.4
0.56
0.71
16
0.2
37
0.2
61
0.2
38
32
30
28
27
26
23
21
-
-
-
0.008
0.031
0.049
0.078
0.099
0.126
0.246
0.396
0.503
1.162
1.916
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SSL2102DB/17W120V,598 功能描述:LED 照明開發(fā)工具 17W 120V dimmable LED Drvr RoHS:否 制造商:Fairchild Semiconductor 產(chǎn)品:Evaluation Kits 用于:FL7732 核心: 電源電壓:120V 系列: 封裝:
SSL2102T/DB/FLYB120V,598 功能描述:LED 照明開發(fā)工具 SSL Mains Dimmable LED Driver Demo RoHS:否 制造商:Fairchild Semiconductor 產(chǎn)品:Evaluation Kits 用于:FL7732 核心: 電源電壓:120V 系列: 封裝:
SSL2102T/DB/FLYB120V598 制造商:NXP Semiconductors 功能描述:IC LED DRVR SOP-20
SSL2102T/DB/FLYB230V,598 功能描述:LED 照明開發(fā)工具 SSL Mains Dimmable LED Driver Demo RoHS:否 制造商:Fairchild Semiconductor 產(chǎn)品:Evaluation Kits 用于:FL7732 核心: 電源電壓:120V 系列: 封裝:
SSL2102T/DB/FLYB230V598 制造商:NXP Semiconductors 功能描述:IC LED DRVR SOP-20
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