IRPLLNR3 查看數據表（PDF） - International Rectifier
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IRPLLNR3 Datasheet PDF : 27 Pages
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IRPLLNR3
INDUCTOR SPECIFICATION
TYPE : LRES(VOLTAGE MODE)
CORE SIZE
E25/13/7 (EF25)
GAP LENGTH 1 mm
BOBBIN
HORIZONTAL
PINS 8
CORE MATERIAL Philips 3C85, Siemens N27 or equivalent
NOMINAL INDUCTANCE
4
mH
MAXIMUM CURRENT
2
Apk
MAXIMUM CORE TEMPERATURE
100
ºC
WINDING START PIN FINISH PIN TURNS WIRE DIAMETER (mm)
MAIN
1
8
250
4 strands of AWG 32
CATHODE (1)
6
7
10
4 strands of AWG 32
CATHODE (2)
4
5
10
4 strands of AWG 32
ELECTRICAL LAYOUT
PHYSICAL LAYOUT
20.05mm
25mm
TOP VIEW
5mm
1
2
3
4
8
7 5mm
6
5
TEST (TEST FREQUENCY = 50kHz)
MAIN WINDING INDUCTANCE MIN 3.9
mH MAX 4.1
mH
MAIN WINDING RESISTANCE MAX 2
Ohms
NOTE : Inductor must not saturate at maximum current and maximum core temperature at given
test frequency.
Demo board Overview
This demo-board is designed for single TL5/35W Lamp, voltage mode heating (JV1, JV2 mounted).
TL5 lamps are becoming more popular due to their lower profile and higher lumen/ watt output. These
lamps, however, can be more difficult to control due to their higher ignition and running voltages. A
typical ballast output stage using current-mode filament heating (filament placed inside L-C tank) will
result in excessive filament current during running. The output stage has therefore been configured
for voltage-mode filament heating using secondary windings off of the resonant inductor LRES. The
lamp has been placed outside the under-damped resonant circuit loop, which consist of LRES and
CRES. The filament heating during preheat can be adjusted with the capacitors CH1 and CH2. The
result is a more flexible ballast output stage necessary for fulfilling the lamp requirements. The DC
blocking capacitor, CDC, is also placed outside the under-damped resonant circuit loop such that it
does not influence the natural resonance frequency of LRES and CRES. The snubber capacitor,
CSNUBB, serves as charge pump for supplying the IR2167.
6
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