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TL431ILPU Datasheet(PDF) 5 Page - NXP Semiconductors |
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TL431ILPU Datasheet(HTML) 5 Page - NXP Semiconductors |
5 / 16 page Philips Semiconductors Product specification TL431C, TL431AC, TL431I, TL431AI, LM431AC Adjustable precision shunt regulators 1997 Feb 25 5 αVREF can be positive or negative depending on whether minimum VREF of maximum VREF, respectively, occurs at the lower temperature. Example: Max VREF = 2496mV at 30°C, Min VREF = 2492mV at 0°C, VREF = 2495mV at 25°C, DTA = 70°C for TL431C. | aV REF | + 4mV 2495mV @ 106 70oC + 23ppm oC Because minimum VREF occurs at the lower temperature, the coefficient is positive. 4. The dynamic impedance is defined as: |Z KA | + DV KA DI K When the device is operating with two external resistors, (see Figure xx), the total dynamic impedance of the circuit is given by: |Z | + DV DI [ |Z KA | 1 ) R1 R2 PARAMETER MEASUREMENT INFORMATION INPUT Vref VKA IK SL01177 Figure 3. Test Circuit for VKA = Vref R1 R2 INPUT Vref VKA Iref IK V KA + V ref 1 ) R1 R2 ) I ref R1 SL01178 Figure 4. Test Circuit for VKA > Vref INPUT VKA Ioff SL01179 Figure 5. Test Circuit for IOFF |
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