BPW-21光电二极管的特性测试
➤ 00光电二极管-BPW21R
硅光电二极管 BPW21R 是由Vishay 半导体公司出品的器件。相比于在 怎么DIY一个粒子检测器 所使用的BPX61,BPW32F来说,它对应的二极管电容数值比较大。这方向反映了它的PIN中的Intrisic区的厚度比较薄。
▲ BPW21, BPX61两款硅光电二极管的电容特性
下面通过测量该BPW21R的部分特性,来为充分应用它打下基础。
测量特性包括:
- 正向、反向伏安特性
- 电容与反向偏置电压之间的关系
- 短路电流与光强之间的关系
- 两种检测方式与器件的相应频率之间的关系
▲ 封装与极性
➤ 01伏安特性
测量条件:
- 将BPW-21至于黑色盒子,进行光线屏蔽;
- 使用1000Ω电阻作为电流采集
1.正向电压伏安特性
▲ 正向BPW-21R伏安特性
v=[0.0010,0.0521,0.0951,0.1530,0.2029,0.2539,0.3038,0.3547,0.4037,0.4497,0.4834,0.5052,0.5189,0.5289,0.5364,0.5425,0.5475,0.5519,0.5556,0.5590,0.5620,0.5648,0.5673,0.5696,0.5718,0.5738,0.5757,0.5775,0.5792,0.5808,0.5823,0.5838,0.5851,0.5865,0.5878,0.5890,0.5902,0.5914,0.5925,0.5936,0.5946,0.5956,0.5966,0.5976,0.5985,0.5994,0.6003,0.6012,0.6020,0.6028,0.6036,0.6044,0.6052,0.6059,0.6067,0.6074,0.6081,0.6088,0.6095,0.6102,0.6109,0.6115,0.6121,0.6128,0.6134,0.6140,0.6146,0.6152,0.6158,0.6164,0.6169,0.6175,0.6181,0.6186,0.6191,0.6197,0.6202,0.6207,0.6212,0.6217,0.6222,0.6227,0.6232,0.6237,0.6242,0.6247,0.6251,0.6256,0.6260,0.6265,0.6269,0.6274,0.6278,0.6283,0.6287,0.6291,0.6295,0.6300,0.6304,0.6308]
c=[0.0007,0.0001,0.0001,0.0001,0.0000,0.0000,0.0000,0.0002,0.0010,0.0061,0.0222,0.0515,0.0876,0.1285,0.1712,0.2159,0.2609,0.3074,0.3537,0.4010,0.4482,0.4960,0.5437,0.5924,0.6401,0.6891,0.7370,0.7862,0.8344,0.8838,0.9321,0.9816,1.0302,1.0798,1.1284,1.1782,1.2268,1.2766,1.3253,1.3753,1.4244,1.4741,1.5233,1.5730,1.6222,1.6719,1.7213,1.7714,1.8203,1.8706,1.9196,1.9699,2.0189,2.0692,2.1183,2.1686,2.2177,2.2680,2.3172,2.3674,2.4167,2.4671,2.5162,2.5667,2.6162,2.6663,2.7158,2.7659,2.8155,2.8657,2.9153,2.9654,3.0150,3.0654,3.1147,3.1652,3.2145,3.2651,3.3145,3.3650,3.4143,3.4648,3.5142,3.5647,3.6140,3.6646,3.7140,3.7646,3.8140,3.8645,3.9143,3.9645,4.0143,4.0645,4.1142,4.1645,4.2142,4.2649,4.3143,4.3649]
2.反向电压伏安特性
▲ 反向电压BPW-21R伏安特性
v=[0.0010,0.0521,0.0995,0.1530,0.2029,0.2539,0.3038,0.3548,0.4047,0.4558,0.5056,0.5567,0.6066,0.6577,0.7078,0.7586,0.8088,0.8595,0.9097,0.9604,0.9897,1.0618,1.1117,1.1628,1.2126,1.2636,1.3134,1.3646,1.4144,1.4654,1.5153,1.5664,1.6163,1.6672,1.7172,1.7683,1.8180,1.8693,1.9189,1.9700,2.0202,2.0710,2.1212,2.1719,2.2220,2.2729,2.3230,2.3741,2.4239,2.4750,2.5249,2.5759,2.6259,2.6769,2.7268,2.7778,2.8277,2.8787,2.9287,2.9797,3.0296,3.0807,3.1305,3.1816,3.2318,3.2825,3.3327,3.3835,3.4337,3.4843,3.5346,3.5853,3.6355,3.6867,3.7364,3.7876,3.8373,3.8885,3.9384,3.9894,4.0393,4.0903,4.1402,4.1912,4.2412,4.2923,4.3421,4.3932,4.4430,4.4941,4.5444,4.5951,4.6453,4.6961,4.7462,4.7971,4.8472,4.8982,4.9482,4.9992]
c=[-0.0000,-0.0000,0.0000,0.0000,0.0000,0.0000,0.0000,0.0000,0.0000,0.0000,0.0000,0.0000,0.0000,0.0001,0.0001,0.0001,0.0001,0.0001,0.0001,0.0001,0.0001,0.0001,0.0001,0.0001,0.0001,0.0001,0.0001,0.0001,0.0001,0.0001,0.0001,0.0001,0.0001,0.0002,0.0002,0.0002,0.0002,0.0002,0.0002,0.0002,0.0002,0.0002,0.0002,0.0002,0.0002,0.0002,0.0002,0.0002,0.0002,0.0002,0.0002,0.0002,0.0002,0.0003,0.0003,0.0003,0.0003,0.0003,0.0003,0.0003,0.0003,0.0003,0.0003,0.0003,0.0003,0.0003,0.0003,0.0003,0.0003,0.0003,0.0003,0.0003,0.0003,0.0003,0.0004,0.0004,0.0004,0.0004,0.0004,0.0004,0.0004,0.0004,0.0004,0.0004,0.0004,0.0004,0.0004,0.0004,0.0004,0.0004,0.0004,0.0004,0.0004,0.0004,0.0005,0.0005,0.0005,0.0005,0.0005,0.0005]
➤ 02反向电压与电容
1.测量方式
使用电缆将BPW-21连接到面包板,使用TH2821A手持LCR表测量结电容。
使用100kΩ施加反向电压。
▲ 测量使用的面包板
2.测量结果
▲ 反向电压与电容
VOLT(V) | 0.025801 | 0.98884 | 1.9905 | 2.9906 | 3.99 | 4.9903 | 5.9897 | 6.9896 | 7.9888 | 8.989 |
---|---|---|---|---|---|---|---|---|---|---|
CAP(pF) | 1357.0 | 1281.0 | 1220.0 | 1168.0 | 1124.0 | 1082.0 | 1050.0 | 1022.0 | 991.0 | 964.0 |
3.结果分析
对比测试结果与手册中的数据,测量结果的数值明显偏大,这可能是由于测量时的引线中的电容引起的。
➤ 03光强与电压
1.测量条件
使用白色LED作为光源,通过电流采集电阻R1(5Ω)获得LED的电流。使用 SP-45ML 检测发送光强。
将SP-45ML与BPW-21放在一起,整个测量布局安装在黑色盒子内,进行光屏蔽。
▲ 测量电路
▲ 测量布局
2.测量数据
▲ 发送电流与光强(橙色)和光电管电压(蓝色)
curr=[-0.0006,-0.0006,-0.0008,-0.0008,-0.0008,-0.0008,-0.0008,-0.0008,-0.0008,-0.0008,-0.0008,-0.0006,-0.0008,-0.0008,-0.0008,-0.0006,-0.0008,-0.0008,-0.0008,-0.0006,-0.0006,-0.0006,-0.0008,-0.0008,-0.0006,-0.0006,-0.0006,-0.0006,-0.0008,-0.0008,-0.0004,-0.0008,-0.0006,-0.0006,-0.0004,-0.0006,-0.0004,-0.0000,-0.0000,0.0000,0.0002,0.0006,0.0012,0.0020,0.0038,0.0092,0.0218,0.0488,0.0972,0.1860,0.3686,0.8270,1.7898,3.4674,5.6112,8.3204,11.2894,14.6134,18.1000,21.8020,25.5860,29.6400,33.6840,37.8860,42.1300,46.5740,50.9460,55.3980,59.8960,64.5500,69.1300,73.8440,78.6560,83.8180,88.8120,93.9500,99.0700,104.5680,109.9160,115.2560,120.9360,126.6940,132.5060,138.3860,144.3460,150.4580,156.4280,162.3740,168.2980,174.4080,180.6000,187.0520,193.1460,199.5020,205.9000,212.1200,218.5400,224.8800,231.1400,237.6600]
volt=[-0.0347,-0.0344,-0.0343,-0.0350,-0.0347,-0.0350,-0.0349,-0.0351,-0.0350,-0.0354,-0.0351,-0.0346,-0.0351,-0.0348,-0.0347,-0.0349,-0.0349,-0.0344,-0.0353,-0.0355,-0.0348,-0.0352,-0.0352,-0.0348,-0.0351,-0.0349,-0.0347,-0.0347,-0.0348,-0.0343,-0.0347,-0.0350,-0.0347,-0.0347,-0.0347,-0.0347,-0.0348,-0.0351,-0.0349,-0.0351,-0.0342,-0.0345,-0.0349,-0.0347,-0.0350,-0.0347,-0.0347,-0.0344,-0.0341,-0.0333,-0.0262,0.0070,0.1243,0.3464,0.3774,0.3918,0.4016,0.4094,0.4157,0.4209,0.4254,0.4294,0.4329,0.4360,0.4388,0.4415,0.4438,0.4460,0.4480,0.4499,0.4516,0.4533,0.4549,0.4565,0.4579,0.4593,0.4606,0.4620,0.4632,0.4643,0.4655,0.4666,0.4677,0.4687,0.4697,0.4707,0.4716,0.4725,0.4734,0.4742,0.4750,0.4758,0.4766,0.4773,0.4780,0.4787,0.4794,0.4800,0.4806,0.4813]
photo=[0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0585,0.0587,0.0598,0.0631,0.0699,0.0792,0.0914,0.1050,0.1204,0.1364,0.1534,0.1709,0.1892,0.2078,0.2266,0.2458,0.2656,0.2850,0.3047,0.3243,0.3447,0.3643,0.3846,0.4054,0.4272,0.4481,0.4696,0.4907,0.5138,0.5357,0.5572,0.5800,0.6030,0.6268,0.6500,0.6732,0.6969,0.7207,0.7434,0.7650,0.7890,0.8121,0.8372,0.8596,0.8829,0.9051,0.9289,0.9522,0.9747,0.9971,1.0198]
➤ 04光强与反向电流
使用SP-45ML测量光强与反向电流之间的关系。
▲ 测试面包板连线
▲ 发光LED电流与电压和反向电流
▲ 发光LED电流与光强(橙色)、反相电流(蓝色)
▲ 光强和反相电流以及线性拟合
➤ 05动态特性
激励电压波形与反向电流波形。
▲ 激励电压波形与反相电流波形
➤ 05反向击穿电压
1.BPW-21光电管
(1) 反向击穿电压
▲ 反向击穿电压
(2) 正向电压与电流
▲ 正向电压
2.BPW31
(1) 反向击穿电压
▲ BPW31反向击穿电压
➤ ※ 结论
■ 相关文献链接:
- BPW21R
- 怎么DIY一个粒子检测器
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