KIA431 datasheet(4/8 Pages) KEC

Il numero della parte	KIA431

Spiegazioni elettronici	BIPOLAR LINEAR INTEGRATED CIRCUIT

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2015. 5. 13

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KIA431 Series

Revision No : 19

Input

FIGURE 1-TEST CIRCUIT FOR VKA = Vref

off

I

KA

V

Input

FIGURE 3-TEST CIRCUIT FOR I off

FIGURE 2-TEST CIRCUIT FOR VKA > Vref

IK

VKA

Input

R1

R2

Iref

VKA = Vref ( 1+

) + Iref R1

R1

R2

Max.

Min.

T1

T2

AMBIENT TEMPERATURE

-

Vref (Min.)

Ta = T2 - T1

Vref

Vref = Vref (Max.)

Vref

Example :

ΔV

ref = 8.0mV and slope is positive,

Vref at 25℃=2.495V, ΔTa=70℃

0.008

×106

αV

ref =

= 45.8 ppm/

℃

70

×(2.495)

Note 2: The dynamic impedance Zka is defined as:

ΔVKA

|Zka| =

ΔIk

When the device is programmed with two external

resistors, R1 and R2, (refer to Figure 2) the total

dynamic impedance of the circuit is defined as:

R1

|Zka’| = |Zka| (1+

)

R2

Note 1:

The deviation parameter

ΔV

ref is defined as the differences

between the maximum and minimum values obtained over the

full operating ambient temperature range that applies.

The average temperature coefficient of the Reference

input voltage,

ΔV

ref , is defined as:

ΔV

ref

(

)

× 106

ppm

Vref at 25℃

αV

ref (

) =

℃ΔTa

ΔV

ref × 10

6

=

ΔTa(V

ref at 25℃)

αV

ref can be positive or negative depending on whether

Vref Min. or Vref Max. occurs at the lower ambient temperature.

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