TL431 参数 Datasheet PDF下载

Electrical Characteristics

TL431

3

Table 3.

Symbol

Electrical Characteristics

T

amb

= 25°C (unless otherwise specified)

TL431C

Parameter

Min.

Reference Input Voltage

V

ref

V

KA

= V

ref

, Ik = 10 mA, T

amb

= 25°C

T

min

≤T

amb

≤

T

max

Reference Input Voltage Deviation Over Temperature

∆V

ref

Range

(1)

V

KA

= Vref, Ik = 10 mA, T

min

≤T

amb

≤

T

max

∆Vref

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

∆Vka

TL431AC

Unit

Max.

Min.

Typ.

Max.

Typ.

2.44 2.495 2.55 2.47 2.495 2.52

2.423

2.567 2.453

2.537

V

mV

3

17

3

15

Ratio of Change in Reference Input Voltage to Change

in Cathode to Anode Voltage

Ik = 10mA -

∆V

KA

= 10V to Vref

∆V

KA

= 36V to 10V

Reference Input Current

Ik = 10mA, R1 = 10kΩ, R2 =

∞

T

amb

= 25°C

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

V

KA

= V

ref

Off-State Cathode Current

Dynamic Impedance

(2)

V

KA

= V

ref

,

∆

Ik = 1 to100mA, f

≤1kHZ

0.22

0.5

0.22

0.5

0.5

2.6

1

1000

0.5

2.6

0.6

1000

0.4

1.2

0.4

1.2

1.8

4

5.2

1.8

4

5.2

-1.4

-1

-2.7

-2

-1.4

-1

-2.7

-2

mV/V

I

ref

µA

∆I

ref

µA

I

min

I

off

⏐ZKA⏐

mA

nA

Ω

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 dynamic Impedance is definied as

|

ZKA

|

=

∆VKA

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

-

∆IK

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