參數(shù)資料
型號(hào)： AN-30
英文描述： TOPSwitch-GX Forward Design Methodology
中文描述： 的TOPSwitch - GX系列正向設(shè)計(jì)方法
文件頁(yè)數(shù)： 17/40頁(yè)
文件大小： 311K
代理商： AN-30
AN-30
17
B
12/02
resistor that can dissipate P
RUVA
watts.
(61)
A typical resistor for this purpose will have a power rating of
P
RUVA
= 125 mW. Choose the nearest standard value for R
UVA
.
Then compute R
UVB
and R
UVC
.
(62)
(63)
Choose the nearest standard values for R
and R
. Then
check V
ACUVL
and V
ACUVX
with the actual resistor values.
on the capacitor for reliable operation of the circuit. The
recommended range for K
is 3 to 5. Choose the nearest
standard value for capacitor C
VS
.
These expressions to compute the component values have been
simplified for ease of presentation. Some variables related to
parasitic elements have been ignored.
If any of the results are not satisfactory, choose different
standard values for the resistors or a different voltage for the
Zener diode. Gross deviations from the desired results may
require different values for the parameters chosen at the
beginning of this step, since some sets of parameters may not be
compatible.
Step 16. Calculate values for resistors in optional external
under-voltage lockout circuit.
The resistor network that determines the characteristics of the
external duty ratio limit sets the minimum voltage where the
converter begins to operate. The contributions of current from
the bias voltage create too much hysteresis for the circuit to be
useful as an under-voltage detector after the converter begins to
operate. Therefore, the external under-voltage circuit in
Figure 9 is recommended for applications where a positive turn-
off threshold is desired.
Choose a value V
for the turn-off threshold and a value
V
ACUVX
that is approximately midway between V
ACUVL
and
V
ACUV
:
(56)
The corresponding DC bus voltages (non-doubled) are
(57)
(58)
(59)
Define the intermediate variable v
that considers the voltage
V
on the CONTROL pin and the base-emitter voltage on
the transistor.
v
V
C SHUNT
1
=
(60)
Compute the approximate value of R
to meet the constraint
of maximum power dissipation. Assume a 50% derating for a
Figure 10. Recommended Clamp Circuit.
PI-2825-121701
D
S
C
CONTROL
TOPSwitch-GX
N
MAIN
D1
VR1
C
CP
R
CS
C
CS
N
P
V
IN
VR2
VR3
Primary
Return
V
V
UVX
ACUVX
=
2
V
V
V
ACUVL
ACUVX
ACUV
<
<
V
BEQ
1
)
R
R
N
N
V
V
v
V
UVB
UVA
B
P
UVL
UVX
UVL
=
1
R
R
v
V
UVC
UVA
UVX
=
1
R
V
P
UVA
MAX
RUVA
=
2
2
V
V
UVX
ACUV
=
2
V
V
P
f
t
C
UVL
ACUVL
O
L
C
DC
IN
=
2
2
1
2
2
η
相關(guān)PDF資料
PDF描述
AN-31 DPA-Switch Forward Converter Design Guide
AN-32 TOPSwitch-GX Flyback Design Methodology
AN-37 LinkSwitch-TN Design Guide
AN-995A Electronic Ballasts Using the Cost-Saving IR215X Drivers(153.99 k)
AN0416NA TRANSISTOR | MOSFET | ARRAY | N-CHANNEL | 160V V(BR)DSS | 30MA I(D) | DIP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AN300 功能描述:環(huán)境檢測(cè)設(shè)備 Large Vane CFM/CMM Thermo-Anemometer RoHS:否 制造商:Fluke 設(shè)備類型:Vibration Meter 測(cè)量?jī)x器:Vibration
AN3000-521P 制造商:未知廠家 制造商全稱:未知廠家 功能描述:AN0625-521P
AN3001 制造商:MA-COM 制造商全稱:M/A-COM Technology Solutions, Inc. 功能描述:PIN diode Vector Modulators - Fundamentals and Drive Requirements
AN-3001 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Application Note AN-3001 Optocoupler Input Drive Circuits
AN-3002 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Low Current Input Circuit Ideas
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 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*