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LTspiceを活用した倍電圧電流で使用した場合
の高温時の出力電流の算出方法
2015年4月27日
ビー・テクノロジー
http://www.beetech.info/
新電元工業製品のD3SB60を照明用倍電圧電流で使用した場
合、Ta=85℃の時、出力電流は何[A]になるのか?
1Copyright(C) Siam Bee Technologies 2015
2Copyright(C) Siam Bee Technologies 2015
新電元工業製品のD3SB60を照明用倍電圧電流で使用した場
合、Ta=85℃の時、出力電流は何[A]になるのか?
3Copyright(C) Siam Bee Technologies 2015
D3SB60のVo及びRoを調査する
Tj=150℃(接合部温度)
Vo=0.78[V](最大値)
Ro=0.034[Ω](最大値)
P[W]を算出する
  150 85
2.16[ ]
30ja
Tj Ta
Ta W

 
  
4Copyright(C) Siam Bee Technologies 2015
回路図作成
5Copyright(C) Siam Bee Technologies 2015
負荷抵抗RLを変更してシミュレーションを実施して平均値を算出する
RL[Ω] Io[A] Power[W]
50
100
200
300
Trace I(V6)の平均値
-4*I(R1)*(v(a)-V(b))の平均値
LTspiceを実行し、上記の表を完成させる
6Copyright(C) Siam Bee Technologies 2015
RL=50[Ω]の場合
7Copyright(C) Siam Bee Technologies 2015
RL=100[Ω]の場合
8Copyright(C) Siam Bee Technologies 2015
RL=200[Ω]の場合
9Copyright(C) Siam Bee Technologies 2015
RL=300[Ω]の場合
10Copyright(C) Siam Bee Technologies 2015
シミュレーション結果
RL[Ω] Io[A] Power[W]
50 3.5146 7.5831
100 2.1336 4.3719
200 1.2322 2.4004
300 0.88116 1.6726
11Copyright(C) Siam Bee Technologies 2015
シミュレーション結果を可視化する。更に関数化を行う。
y = -0.35785 + 2.2495x R= 0.99979
12Copyright(C) Siam Bee Technologies 2015
シミュレーション結果を可視化する。更に関数化を行う。
y = -0.35785 + 2.2495x R= 0.99979
2.16[W]=-0.35785+2.2495*Io[A]
2.2495*Io[A]=2.51785
2.51785
1.12[ ]
2.2495
Io A 
新電元工業製品のD3SB60を照明用倍電圧電流で使用した場
合、Ta=85℃の時、出力電流は何[A]になるのか?
1.12[A]
13Copyright(C) Siam Bee Technologies 2015
Appendix
jaTj P Ta  
 
ja
Tj Ta
Ta




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LTspiceを活用した倍電圧電流で使用した場合の出力電流算出方法