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HCPL-M456 Fiches technique(PDF) 12 Page - Agilent(Hewlett-Packard) |
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HCPL-M456 Fiches technique(HTML) 12 Page - Agilent(Hewlett-Packard) |
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12 / 14 page ![]() 1-60 Figure 27. Recommended LED Drive Circuit for Ultra High CMR. Figure 24. AC Equivalent Circuit for Figure 19 During Common Mode Transients. Figure 25. Not Recommended Open Collector LED Drive Circuit. Figure 26. AC Equivalent Circuit for Figure 25 During Common Mode Transients. Q1 +5 V 8 7 6 1 3 SHIELD 5 2 4 20 k Ω 20 k Ω * THE ARROWS INDICATE THE DIRECTION OF CURRENT FLOW FOR +dVCM/dt TRANSIENTS. VOUT 100 pF + VCM 8 7 6 1 3 SHIELD 5 2 4 20 k Ω CLEDP CLEDN CLED01 CLED02 ICLEDN* Q1 +5 V 8 7 6 1 3 SHIELD 5 2 4 20 k Ω 20 k Ω * THE ARROWS INDICATE THE DIRECTION OF CURRENT FLOW FOR +dVCM/dt TRANSIENTS. ** OPTIONAL CLAMPING DIODE FOR IMPROVED CMH PERFORMANCE. VR < VF (OFF) DURING +dVCM/dt. VOUT 100 pF + VCM 8 7 6 1 3 SHIELD 5 2 4 20 k Ω CLEDP CLEDN CLED01 CLED02 ICLEDN* 310 Ω + VR** – Figure 28. Typical Application Circuit. 0.1 µF 20 k Ω CMOS 310 Ω +5 V VOUT1 I LED1 VCC1 M HCPL-4506 HCPL-4506 HCPL-4506 HCPL-4506 HCPL-4506 Q2 Q1 -HV +HV IPM 8 7 6 1 3 SHIELD 5 2 4 20 k Ω HCPL-4506 0.1 µF 20 k Ω CMOS 310 Ω +5 V VOUT2 I LED2 VCC2 8 7 6 1 3 SHIELD 5 2 4 20 k Ω HCPL-4506 |
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