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参数资料
| 型号： | IR2159STR |
| 厂商： | International Rectifier |
| 文件页数： | 22/25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)
Should the peak voltage on pin CS exceed 1.6V
at any time during dimming, the IR2159 enters
FAULT mode and the high and low-side driver
outputs, HO and LO, are both turned off . Cycling
the supply voltage on VCC below or the voltage
on pin SD will reset the IR2159 to preheat (PH)
mode (see STATE DIAGRAM).
Ballast Design
Lamp Requirements
Ballast Output Stage
The components comprising the output stage are
selected using a set of equations. Different ballast
operating frequencies and their respective
voltages and currents are calculated.
The inductor and capacitor values are obtained
using equations (2) through (7). The results of
these equations reveal the location of each
operating frequency and the corresponding
voltages and currents. For a given L, C, DC bus
voltage, and pre-heat current, the resulting voltage
over the lamp during pre-heat is given as:
? ? 2 V DC ? 2
? ? ? π
8 L 2 ? 2
? ?
Before selecting component values for the ballast
output stage and the programmable inputs of the
IR2159, the following lamp requirements must first
be defined:
Variable
Description
Units
V ph
= ? ? ? +
?
C
1
I ph ? ?
2 V DC (2)
π
I ph
t ph
Filament pre-heat current
Filament pre-heat time
Arms
s
The resulting operating frequency during pre-heat
is given as:
V ph max
V ign
Maximum lamp pre-heat voltage
Lamp ignition voltage
Vpp
Vpp
f ph =
2 I ph
π CV ph
[Hz]
(3)
P 100 %
Lamp power at 100% brightness
W
V 100 %
P 1 %
Lamp voltage at 100% brightness
Lamp power at 1% brightness
Vpp
W
The resulting operating frequency during ignition
is given as:
V
V 1 %
I Cath min
Lamp voltage at 1% brightness
Minimum cathode heating current
Table I, Typical lamp requirements
Vpp
Arms
f ign =
1
2 π
4
1 + π DC
V ign
LC
[Hz]
(4)
The total load current during ignition is given as:
22
I ign = f ign CV ign 2 π
[App] (5)
www.irf.com
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| IR2161 | 制造商:International Rectifier 功能描述: |
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