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TL432-CSF Datasheet(PDF) 5 Page - HTC Korea TAEJIN Technology Co. |
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TL432-CSF Datasheet(HTML) 5 Page - HTC Korea TAEJIN Technology Co. |
5 / 5 page Low Voltage(1.24V) Adjustable Precision Shunt Regulator TL432/ A / C The deviation parameters VREF(DEV) and IREF(DEF) are defined as the differences between the maximum and minimum values obtained over the recommended temperature range. The average full-range temperature coefficient of the reference voltage, αV REF, is defined as : Where : ΔTA is the recommended operating free-air temperature range of the device. αVREF can be positive or negative, depending on whether minimum V REF or maximum VREF, respectively, occurs at the lower temperature. Example : Maximum VREF=1190㎷ at 30℃, maximum VREF=1262㎷ at 0℃, VREF=1241㎷ at 25℃, ΔTA=125℃ for TL431C Because minimum VREF occurs at the lower temperature, the coefficient is positive. Calculating Dynamic Impedance The dynamic impedance is defined as : When the device is operating with two external resistors (see Figure 3), the total dynamic impedance of the circuit is given by : Jan, 2004 - Rev 01 HTC 25 125℃ 7.2㎷ 1241㎷ x10 6 ) ( |αVREF|= ~ 46PPM/℃ x10 6 VI(dev) VREFat 25℃ ) ( |αVREF| ΔTA ppm ℃ = ) ( ΔV ΔI (1+ ) R1 R2 |Z'|= ~|ZKA| ΔVKA ΔIKA |ZKA|= ΔTA VI(dev) Maximum VREF Minimum VREF ~ ~ |
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