参数资料
型号: IR2159STR
厂商: International Rectifier
文件页数: 23/25页
文件大小: 0K
描述: IC BALLAST CONTROL DIM 16-SOIC
标准包装: 2,500
类型: 镇流器控制器
频率: 25 ~ 95 kHz
电流 - 电源: 10mA
电源电压: 12.5 V ~ 15.6 V
工作温度: -40°C ~ 125°C
封装/外壳: 16-SOIC(0.154",3.90mm 宽)
供应商设备封装: 16-SOIC N
包装: 带卷 (TR)
IR2159/IR21591 (S)
? 4 V DC ?
1 ? ? ?
?
? V 100 % π ?
? 1
32 P 2 ?
32 P 2
(6)
? 2 100 4 % ? ?
f 100 % =
? 2 100 4 % + ?
2 π LC C V 100 %
? LC C V 100 % ?
L C
? 4 V ?
2 2 1 ? ? DC ?
? 1 32 P ? ? V % π ?
32 P
1
1
2 π LC C V %
f % = ? 2 % + ? ? 2 % ? ?
? LC C V % ?
? % =
C ? 2 % L ) 2 π f % ? 4 % LC 2 π 3 f % 3 ]
180 ? 1 V % 2 P V 2
π
The operating frequency [Hz] at maximum lamp
power is given as:
2
?
2
1 1
2 2
tan [(
% %
2 P V % P
2
L 2 C 2
2
(8)
(9)
The cathode heating current at minimum lamp
power is given as:
With the lamp requirements defined, the L and C
of the ballast output stage selected, and the
I Cath 1 % =
V 1 % f 1 % π C
2
(7)
minimum and maximum phase calculated, the
component values for setting the programmable
inputs of the IR2159 are obtained with the following
equations:
V ph < V ph max
( 25 e ? 6 ) ? ( f MIN ? 10000 ) ? ( 1 e ? 10 )
( f MIN ? 10000 ) ? ( 2 e ? 14 )
R CS =
Design Constraints
The inductor and capacitor values should be
iterated until the following design constraints have
been fulfilled (Table II).
Design Constraint Reason
Ignition during pre-
heat
R FMIN =
2 ? (1.6)
I ign
[Ohms] (10)
[Ohms] (11)
< I
f ph ? f ign > 5 kHz
I ign ign max
I Cath 1 % ≥ I Cath min
Production tolerances
Inductor saturation
Lamp extinguishing
during dimming
R IPH = R FMIN R CS I ph 2
C CPH = ( 2 . 6 E ? 7 )( t PH )
[Ohms]
[Farads]
(12)
(13)
Table II, Ballast design constraints
? 1 ? 1 % ?
IR2159 Programmable Inputs
R MIN =
4 ? 45 ?
R FMIN ? ? ?
[Ohms]
(14)
In order to program the MIN and MAX settings of
4 ? R MIN ? R FMIN ? ? 1 ? 100 % ?
the dimming interface, the phase of the output
stage current at minimum and maximum lamp
power must be calculated. This is obtained using
the following equations:
R MAX =
0 . 86 ? R FMIN ? R MIN
? ? ?
? 45 ?
www.irf.com
[Ohms]
(15)
23
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