công cụ tìm kiếm bảng dữ liệu linh kiện điện tử
  Vietnamese  ▼
ALLDATASHEET.VN

X  

Preview PDF HTML

IRPLDIM1 bảng dữ liệu(PDF) 7 Page - International Rectifier

tên linh kiện IRPLDIM1
Giải thích chi tiết về linh kiện  Dimming Ballast Control IC Design Kit
PDF  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
nhà sản xuất  IRF [International Rectifier]
Trang chủ  http://www.irf.com
Logo IRF - International Rectifier

IRPLDIM1 bảng dữ liệu(HTML) 7 Page - International Rectifier

Back Button IRPLDIM1 Datasheet HTML 3Page - International Rectifier IRPLDIM1 Datasheet HTML 4Page - International Rectifier IRPLDIM1 Datasheet HTML 5Page - International Rectifier IRPLDIM1 Datasheet HTML 6Page - International Rectifier IRPLDIM1 Datasheet HTML 7Page - International Rectifier IRPLDIM1 Datasheet HTML 8Page - International Rectifier IRPLDIM1 Datasheet HTML 9Page - International Rectifier IRPLDIM1 Datasheet HTML 10Page - International Rectifier IRPLDIM1 Datasheet HTML 11Page - International Rectifier Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 12 page
background image
7
www.irf.com
Ballast Design
Lamp Requirements
Before selecting component values for the bal-
last output stage and the programmable inputs
of the IR21592, the following lamp requirements
must first be defined:
Table I, Typical lamp requirements
Ballast Output Stage
The components comprising the output stage
are selected using a set of equations. Different
ballast operating frequencies and their respec-
tive voltages and currents are calculated. The
inductor and capacitor values are obtained us-
ing equations (2) through (7). The results of
these equations reveal the location of each
operating frequency and the corresponding volt-
ages and currents. For a given L, C, DC bus
voltage, and pre-heat current, the resulting volt-
age over the lamp during pre-heat is given as:
π
π
DC
ph
DC
ph
V
I
C
L
V
V
−
+
=
2
2
8
[Vpp]
(2)
The resulting operating frequency during pre-
heat is given as:
ph
ph
ph
CV
I
f
π
2
=
[Hz]
(3)
The resulting operating frequency during igni-
tion is given as:
LC
V
V
f
ign
DC
ign
π
π
4
1
2
1
+
=
[Hz]
(4)
The total load current during ignition is given
as:
If
CV
ign
ign
ign
=
2
π
[App] (5)
The operating frequency [Hz] at maximum lamp
power is given as:
(6)
The cathode heating current at minimum lamp
power is given as:
2
%
1
%
1
%
1
C
f
V
I
Cath
π
=
(7)
Design Constraints
The inductor and capacitor values should be it-
erated until the following design constraints have
been fulfilled (Table II).
Table II, Ballast design constraints
2
2
2
%
100
2
4
%
100
2
2
%
100
4
%
100
2
2
%
100
%
100
4
1
4
32
1
32
1
2
1
C
L
V
V
V
C
P
LC
V
C
P
LC
f
DC


−
−
−
+
−
=
π
π
Variable
Description
Units
ph
I
Filament pre-heat current
Arms
ph
t
Filament pre-heat time
s
max
ph
V
Maximum lamp pre-heat voltage
Vpp
ign
V
Lamp ignition voltage
Vpp
%
100
P
Lamp power at 100% brightness
W
%
100
V
Lamp voltage at 100% brightness
Vpp
%
1
P
Lamp power at 1% brightness
W
%
1
V
Lamp voltage at 1% brightness
Vpp
min
Cath
I
Minimum cathode heating current
Arms
Design Constraint
Reason
VV
ph
ph
<
max
Ignition during pre-heat
ff
kHz
ph
ign
−> 5
Production tolerances
II
ign
ign
<
max
Inductor saturation
min
%
1
Cath
Cath
I
I
≥
Lamp
extinguishing
during
dimming



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12


bảng dữ liệu tải về

Go To PDF Page


Link URL



Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không?  [ DONATE ] 

Alldatasheet là   |   Quảng cáo   |   Liên lạc với chúng tôi   |   Chính sách bảo mật   |   Liên kết đến bảng dữ liệu    |   Trao đổi link   |   Tìm kiếm theo nhà sản xuất
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com