參數(shù)資料
型號(hào)： AN-18
英文描述： TOPSwitch Flyback Transformer Construction Guide
中文描述： 回掃變壓器的TOPSwitch施工指南
文件頁(yè)數(shù)： 29/32頁(yè)
文件大?。?/td> 275K
代理商： AN-18
A
7/96
AN-18
29
spreadsheet. 26 AWG wire has a bare area of 252.8 circular
mils. Two parallel strands of 26 AWG triple insulated wire have
a current capacity of:
CMA
S
=
×
225
.
=
2
2528
2247
.
.
circular mils/ampere
This value is within 10% of the primary CMA of 243 circular
mils/ampere, and satisfies the CMA limit of 200-500 circular
mils per ampere.
Bias Wire Size
The bias winding wire size is chosen to fill as much of the
bobbin width as possible. Since there are usually relatively few
turns on the primary bias winding, this is best accomplished by
using a bifilar winding rather than a large diameter wire,
effectively doubling the number of physical turns.
The required
TC to fill a single layer can be calculated as follows:
TC
N
BW
M
turns cm
15
B
(
=
×
×
×
=
× ×
(
×
=
2
10
2
2
2
12
0
)
)
From the wire table, the closest wire size with a TC greater than
or equal to this value is 23 AWG, with a TC
of 15.82 turns/cm.
This wire is too large to use with a small bobbin. A compromise
is to use the next smallest size, 24 AWG, which will not fill the
bobbin width completely, but is easier to terminate to the
bobbin pins. Since the output current of this winding is 10 mA
or less, there is no need to consider the current capacity of the
wire. The wire size in this case is determined by fill factor
requirements rather than current capacity.
Transformer Construction Style
Since this transformer is a triple insulated wire design for a
secondary regulated application, appropriate construction styles
are Figure 7B and 10B. Because this design is for a 15W
application, a split primary winding as shown in Figure 10B is
not necessary, and the more cost effective single section primary
design of Figure 7B should be used.
Tape Sizes
Since this is a triple insulated design, one size of tape is required
for basic insulation, with a width equal to BW. From cell (B27)
of the Table 6 spreadsheet, this is 12.0 mm.
Insulating Sleeving Size
Since this is a triple insulated wire design, no sleeving is
required
Gapped Core Inductance Coefficient
The A
for this transformer design is given in cell (C47) of the
design spreadsheet, and should be used as the center value for
specifying the core A
LG
on the transformer specification.
Finished Triple Insulated Wire Transformer Design
The information required to assemble a transformer specification
for the triple insulated wire transformer example is summarized
in Table 8. A completed transformer schematic diagram and
parts list are shown in Figure 8. A construction drawing is
shown in Figure 9.
相關(guān)PDF資料
PDF描述
AN-19 TOPSwitch Flyback Power Supply Efficiency
AN-20 Transient Suppression Techniques for TOPSwitch Power Supplies
AN-22 OBSOLETE when inventory is depleted. 10% tolerance no l
AN-23 TinySwitch Flyback Design Methodology
AN-29 TOPSwitch-GX Flyback Quick Selection Curves
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AN-181 制造商:FLORIDA MISC. 功能描述: 制造商:Florida Misc. 功能描述:
AN18101A-VF 制造商:MATSUSHITA_PANA 功能描述:
AN18103A-VB 制造商:MATSUSHITA_PANA 功能描述:
AN1812 制造商:MOTOROLA 制造商全稱(chēng):Motorola, Inc 功能描述:Freescale Semiconductor, Inc.
AN1816 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:USING THE HC912B32 TO IMPLEMENT THE DISTRIBUTED SYSTEMS INTERFACE (DSI) PROTOCOL
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠(chǎng)商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*