如果驱动设备是标准5 V差分线路驱动器,当现场接线臂端子1为逻 辑低电平,端子2为逻辑电平时,D2和D3提供反向电流通路。组 合压降与光电二极管上的大致相同(约1.4 V)。相对于只有一个二极 管的电路,该电路所示驱动器具有更强的对称性或平衡性。
电路详细分析在之前的示例中,我们在光电二极管和R5-R6上使用2.0 V恒定压降。 要计算真实的光电二极管电流,应将光电二极管、D1、Q1、R5和R6 视为一个电路。D1和Q1上的压降始终等于光电二极管和R5-R6上的 压降。我们称之为Vdrop。
首先,考虑低要求If = 4 mA的情况。随着结温70...25 °C的变化, 该光电二极管压降的Vf曲线通常为1.21...1.29 V。我们不妨将其定为 1.25 V。对于4 mA的电流,R5和R6上的压降为(80.4 Q x 4 mA) = 0.32 V。 因而,当电流为4 mA时:
Vdrop = (1.25V + 0.32V) = 1.57 V。
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MITSUBISHI Model SN11-AC200V Model SN11AC200V
MITSUBISHI Model MSO-2XN10CX Model MSO2XN10CX
MITSUBISHI Model FR-CBL-05 Model FRCBL05
MITSUBISHI Model MB30-SS-3P-1.2A-500V-F Model MB30SS3P12A500VF
MITSUBISHI Model MB30-S-3P-1A-460V Model MB30S3P1A460V
MITSUBISHI Model A6TBY54-E Model A6TBY54E
MITSUBISHI Model HAR00160 Model HAR00160
MITSUBISHI Model MR-J2S-T01 Model MRJ2ST01
MITSUBISHI Model ET10091 Model ET10091
MITSUBISHI Model NF30-KB-2P-30A Model NF30KB2P30A
MITSUBISHI Model NF60-CS-3P-60A Model NF60CS3P60A
MITSUBISHI Model MR-PWKCBL5M Model MRPWKCBL5M
MITSUBISHI Model QD75MCBL-2M Model QD75MCBL2M
MITSUBISHI Model PS21864A Model PS21864A
MITSUBISHI Model FA-CBL30FMVE Model FACBL30FMVE
MITSUBISHI Model C164B254G51 Model C164B254G51
MITSUBISHI Model MR-MTR-CON-KIT-B Model MRMTRCONKITB
MITSUBISHI Model 998367-7120S8M0250B Model 9983677120S8M025
MITSUBISHI Model QM100DY-2H Model QM100DY2H
MITSUBISHI Model FX-8AV Model FX8AV
MITSUBISHI Model FR-ABR-H3.7K Model FRABRH37K
MITSUBISHI Model NV60-SP-3P-60A Model NV60SP3P60A
MITSUBISHI Model MR-EKCBL5M-H Model MREKCBL5MH
MITSUBISHI Model NV60-SS-3P-60AMP Model NV60SS3P60AMP
MITSUBISHI Model GT15-AC06B Model GT15AC06B
MITSUBISHI Model NF50-CB Model NF50CB
MITSUBISHI Model NV100-SWU3-100 Model NV100SWU3100
MITSUBISHI Model FX2NC-16EX Model FX2NC16EX
MITSUBISHI Model SR-21-8365 Model SR218365
MITSUBISHI Model 2A-CBL15 Model 2ACBL15
MITSUBISHI Model 16A50-14602 Model 16A5014602
MITSUBISHI Model FR-ABR-H2-2K Model FRABRH22K
MITSUBISHI Model CM200DY12NFA Model CM200DY12NFA
MITSUBISHI Model S-K50UL-AC100-127V Model SK50ULAC100127V
MITSUBISHI Model MR-P2CBL5M Model MRP2CBL5M
MITSUBISHI Model MR-J2HBUS3M Model MRJ2HBUS3M
MITSUBISHI Model FX0S-14MT-DSS Model FX0S14MTDSS
MITSUBISHI Model FX-16EX-A1-TB/UL Model FX16EXA1TBUL
MITSUBISHI Model FX0-30MT-D/E Model FX030MTDE
MITSUBISHI Model MR-ENCBL30M-H Model MRENCBL30MH
MITSUBISHI Model MB30-SS Model MB30SS
MITSUBISHI Model A1S-33B Model A1S33B
MITSUBISHI Model D-422RW Model D422RW
MITSUBISHI Model SC-A1040B-UL Model SCA1040BUL
MITSUBISHI Model FX1S-14MT-DSS Model FX1S14MTDSS
MITSUBISHI Model MR-ENCBL10M Model MRENCBL10M
MITSUBISHI Model A2S-MCA-14KP Model A2SMCA14KP
MITSUBISHI Model A1S-Y28EU Model A1SY28EU
MITSUBISHI Model AJ65-BTB2-16D Model AJ65BTB216D
MITSUBISHI Model FR-E520-0.2K Model FRE52002K
MITSUBISHI Model A1S-I61 Model A1SI61
MITSUBISHI Model MR-ENCBL5M-H Model MRENCBL5MH
MITSUBISHI Model A1S-P60 Model A1SP60
MITSUBISHI Model GT15-FNB Model GT15FNB
MITSUBISHI Model A6CON-PW5P Model A6CONPW5P
MITSUBISHI Model E70CA15C15 Model E70CA15C15