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ULN2003LV Datasheet(PDF) 8 Page - Texas Instruments |
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ULN2003LV Datasheet(HTML) 8 Page - Texas Instruments |
8 / 19 page ULN2003LV IN3 IN4 OUT 1 OUT 2 OUT 3 OUT 4 IN5 IN6 IN7 GND OUT 5 OUT 6 OUT 7 COM IN1 IN2 VSUP LED Supply(Up to 8V) R1 OUT 7 VSUP VSUP VIN (Up to 5.5V) OUT7 R1 = (VIN-VOUT7)/IREF7 Use plot to estimate VOUT7 for the desired IREF7 ULN2003LV SLRS059A – APRIL 2012 – REVISED APRIL 2012 www.ti.com Constant Current Generation When configured as per Figure 5 the ULN2003LV outputs OUT1-OUT6 act as independent constant current sources. The current flowing through the resistor R1 is copied on all other channels. To increase the current sourcing connect several output channels in parallel. To ensure best current copying set voltage drop across connected load such that VOUTx matches to VOUT7. Figure 5. ULN2003LV as a Constant Current Driver Figure 6. ULN2003LV Iref vs VOUTx 8 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): ULN2003LV |
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