TL432-A Просмотр технического описания (PDF) - HTC Korea

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TL432-A

Low Voltage(1.24V) Adjustable Precision Shunt Regulator

HTC Korea 

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 :

｜αVREF｜（

ppm

℃

（

）=

VREVF aI(dte2v)5℃）x106

ΔTA

Maximum VREF

Minimum VREF

VI(dev)

ΔTA

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

｜αVREF｜= （ 1274.21㎷㎷）x106 ~~ 46PPM/℃

125℃

Because minimum VREF occurs at the lower temperature, the coefficient is positive.

Calculating Dynamic Impedance

｜ZKA｜=

ΔVKA

ΔIKA

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 :

｜Z'｜=

ΔV

ΔI

~~｜ZKA｜ （1+

R1

R2 ）

Jan, 2004 - Rev 01

25

HTC

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