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IRPLDIM1 Datasheet(PDF) 8 Page - International Rectifier

Part # IRPLDIM1
Description  Dimming Ballast Control IC Design Kit
PDF  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  IRF [International Rectifier]
Direct Link  http://www.irf.com
Logo IRF - International Rectifier

IRPLDIM1 Datasheet(HTML) 8 Page - International Rectifier

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IR2159 Programmable Inputs
In order to program the MIN and MAX settings
of the dimming interface, the phase of the out-
put stage current at minimum and maximum
lamp power must be calculated. This is obtained
using the following equations:
2
2
2
%
2
4
%
2
2
%
4
%
2
2
%
%
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
(8)
]
4
2
)
2
2
[(
tan
180
3
%
3
2
%
2
%
%
2
%
%
%
2
%
1
%
f
LC
P
V
f
L
V
P
C
P
V
π
π
π
ϕ
−
−
=
−
(9)
With the lamp requirements defined, the L and
C of the ballast output stage selected, and the
minimum and maximum phase calculated, the
component values for setting the programmable
inputs of the IR21592 are obtained with the fol-
lowing equations:
This ballast design procedure has been sum-
marized into the following 3 steps:
Figure 3, Simplified Ballast Design Procedure
Ballast Designer Software
Included with the design kit is the Ballast Designer
Software which allows for selection of different
lamp types, different input voltage ranges or dif-
ferent lamp configurations. The software then
performes all of the necessary design iterations
and generates new schematics and a bill of ma-
terials.
IRPLDIM1U Design
Line Input Voltage: 90 to 140VAC/50/60Hz
Lamp Power/Type: 32W/T8
1) Lamp Requirements
Typical high-frequency (25kHz) lamp require-
ments for the 32W/T8 lamp type are given as:
Table III, 32W/T8 lamp requirements
)
14
2
(
)
10000
(
)
10
1
(
)
10000
(
)
6
25
(
−
⋅
−
−
⋅
−
−
−
=
e
f
e
f
e
R
MIN
MIN
FMIN
[Ohms] (10)
ign
CS
I
R
)
6
.
1
(
2
⋅
=
[Ohms] (11)
2
ph
CS
FMIN
IPH
I
R
R
R
=
[Ohms] (12)
)
)(
7
2
(
PH
CPH
t
E
C
−
=
[Farads] (13)
 −
=
45
1
4
%
1
ϕ
FMIN
MIN
R
R
[Ohms] (14)
[Ohms] (15)
 −
⋅
−
⋅
⋅
⋅
=
45
1
4
86
.
0
%
100
ϕ
FMIN
MIN
MIN
FMIN
MAX
R
R
R
R
R
Define
Lamp
Requirements
Iterate L and C
to fulfill
constraints
Calculate IR2159
Programmable
Inputs
Variable
Value
Units
ph
I
0.6
Arms
ph
t
1.0
s
max
ph
V
600
Vpp
ign
V
1300
Vpp
max
P
30
W
max
P
V
400
Vpp
min
P
1
W
min
P
V
330
Vpp
min
Cath
I
0.35
Arms



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