1431C 参数 Datasheet PDF下载

TL1431

Table 4.

Symbol

Electrical Characteristics

T

amb

= 25°C (unless otherwise specified)

TL1431I

Parameter

Min.

Typ.

Max.

Min.

Typ.

Max.

V

Reference Input Voltage - figure 1

V

KA

= V

ref

, Ik = 10 mA

Reference Input Voltage Deviation Over

Temperature Range

(1)

- figure 1

V

KA

= Vref, Ik = 10 mA, T

min

≤T

amb

≤

T

max

7

30

7

30

2.490 2.500 2.510 2.493 2.500 2.507

TL1431AI

Unit

V

ref

∆V

ref

mV

∆Vref

---------------

-

∆T

Temperature Coefficient of Reference Input

Voltage

(2)

V

KA

= Vref, Ik = 10 mA, T

min

≤T

amb

≤

T

max

Ratio of Change in Reference Input Voltage to

Change in Cathode to Anode Voltage - figure 2

Ik = 10mA -

∆V

KA

= 36V to 3V

Reference Input Current

Ik = 10mA, R1 = 10kΩ, R2 =

∞

T

min

≤T

amb

≤T

max

Reference Input Current Deviation Over

Temperature Range

Ik = 10mA, R1 = 10kΩ, R2 =∞

T

min

≤T

amb

≤

T

max

Minimum Cathode Current for Regulation - figure 1

V

KA

= V

ref

Off-State Cathode Current - figure 3

Dynamic Impedance

(3)

V

KA

= V

ref

,

∆

Ik = 1 to100mA, f

≤1kHZ

0.2

0.5

0.2

0.5

0.5

180

1

500

0.5

180

0.7

500

0.5

1

0.8

1.2

mA

nA

Ω

-1.1

2

-1.1

2

µA

±22

±100

±22

±100

ppm/°C

∆Vref

---------------

-

∆Vka

I

ref

mV/V

1.5

2.5

3

1.5

2.5

3

∆I

ref

µA

I

min

I

off

⏐ZKA⏐

1.

∆

V

ref

is defined as the difference between the maximum and minimum values obtained over the full temperature range.

∆

V

ref

= V

ref max.

- V

ref min.

V

ref max.

V

ref min.

T1

T2

Temperature

2.

The temperature coefficient is defined as the slopes (positive and negative) of the voltage vs temperature limits within

which the reference is guaranteed.

-n

ppm

Max

2.5V

min

/°C

+n p

°C

pm/

Temperature

25°C

3. The dynamic Impedance is definied as

|

ZKA

|

=

∆VKA

----------------

-

∆IK

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