ISSI Flicker-Free IS31LT3935 Manual page 5

IS31LT3935 Bulb Lighting Evaluation Board Guide
Transformer Design
ELECTRICAL SPECIFCATIONS:
1.Primary inductance(Lp)=450uH@10kHz
Primary Leakage Inductance (Lk)< = 20uH @10KHz
2.
3. Electrical Strength = 3KV, 50/60Hz,1Min
MATERIALS:
1. Core:PQ2016(Ferrite Material TDK PC40 or equivalent)
2. Bobin:PQ2016 Primary 6,Secondary:8
3.. Magnet Wires (Pri) : Type 2-UEW
4. Magnet Wire (Sec) : Triple Insulated Wires
5. Layer Insulation Tape :3M1298 or equivalent.
SCHEMTIC
NO. winding Start
1 NP1 3
2 NS 14
3 NP2 2
Line Regulation and Efficiency
Input Voltage Input Power
176Vac/50Hz
198Vac/50Hz
220Vac/50Hz
242Vac/50Hz
264Vac/50Hz
Integrated Silicon Solution, Inc. – www.issi.com
R1.0, 18/04/2013
number
End number
of plies
of turns
2 17T 2
9 16T 2
1 16T 1
THD
15.53 11.8%
17.24 13.8%
18.69 26.0%
19.95 27.3%
21.10 28.5%
number of
diameter
plies
0.40mm-2-UEW 2
2P*0.20mm-TEX 3
0.40mm- 2-UEW 3
PF Output Voltage
0.979 40.4
0.964 40.8
0.945 41.2
0.925 41.5
0.905 41.8
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remar
tape
ks
0.02*7.5mm
0.02*7.5mm
0.02*7.5mm
Output Current Efficiency
0.329 85.60%
0.360 85.20%
0.386 85.09%
0.407 84.66%
0.424 84.00%
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