TL431BCLP datasheet(3/19 Pages) ONSEMI

3 / 19 page

TL431, A, B Series, NCV431A, B

http://onsemi.com

ELECTRICAL CHARACTERISTICS (TA = 25°C, unless otherwise noted.)

Characteristic

Symbol

TL431I

TL431C

Unit

Min

Typ

Max

Min

Typ

Max

Reference Input Voltage (Figure 1)

VKA = Vref, IK = 10 mA

TA = 25°C

TA = Tlow to Thigh (Note 1)

Vref

2.44

2.41

2.495

−

2.55

2.58

2.44

2.423

2.495

−

2.55

2.567

Reference Input Voltage Deviation Over

Temperature Range (Figure 1, Notes 1, 2)

VKA= Vref, IK = 10 mA

DVref

−

7.0

−

3.0

Ratio of Change in Reference Input Voltage to Change

in Cathode to Anode Voltage

IK = 10 mA (Figure 2),

DVKA = 10 V to Vref

DVKA = 36 V to 10 V

ref

−

−1.4

−1.0

−2.7

−2.0

−

−1.4

−1.0

−2.7

−2.0

mV/V

Reference Input Current (Figure 2)

IK = 10 mA, R1 = 10 k, R2 = ∞

TA = 25°C

TA = Tlow to Thigh (Note 1)

Iref

−

1.8

−

4.0

6.5

−

1.8

−

4.0

5.2

Reference Input Current Deviation Over

Temperature Range (Figure 2, Note 1, 4)

IK = 10 mA, R1 = 10 k, R2 = ∞

DIref

−

0.8

2.5

−

0.4

1.2

Minimum Cathode Current For Regulation

VKA = Vref (Figure 1)

Imin

−

0.5

1.0

−

0.5

1.0

Off−State Cathode Current (Figure 3)

VKA = 36 V, Vref = 0 V

Ioff

−

1000

−

1000

Dynamic Impedance (Figure 1, Note 3)

VKA = Vref, DIK = 1.0 mA to 100 mA

≤ 1.0 kHz

|ZKA|

−

0.22

0.5

−

0.22

0.5

1. Tlow

= −40

°C for TL431AIP TL431AILP, TL431IP, TL431ILP, TL431BID, TL431BIP, TL431BILP, TL431AIDM, TL431IDM, TL431BIDM;

°C for TL431ACP, TL431ACLP, TL431CP, TL431CLP, TL431CD, TL431ACD, TL431BCD, TL431BCP, TL431BCLP, TL431CDM,

TL431ACDM, TL431BCDM

Thigh = +85°C for TL431AIP, TL431AILP, TL431IP, TL431ILP, TL431BID, TL431BIP, TL431BILP, TL431IDM, TL431AIDM, TL431BIDM

= +70

°C for TL431ACP, TL431ACLP, TL431CP, TL431ACD, TL431BCD, TL431BCP, TL431BCLP, TL431CDM, TL431ACDM,

TL431BCDM

2. The deviation parameter

DVref is defined as the difference between the maximum and minimum values obtained over the full operating

ambient temperature range that applies.

DVref = Vref max

−Vref min

DTA = T2 − T1

Ambient Temperature

Vref min

Vref max

The average temperature coefficient of the reference input voltage,

aVref is defined as:

ref

ppm

D V

ref

@25

X106

D T

D V

ref

x106

D T

ref

@25

_C)

aVref can be positive or negative depending on whether Vref Min or Vref Max occurs at the lower ambient temperature. (Refer to Figure 6.)

Example :

ref +

8.0 mV and slope is positive,

ref

@25

_C + 2.495 V, DT

A +

a V

ref +

0.008 x 106

70 (2.495)

+ 45.8 ppm _C

3. The dynamic impedance ZKA is defined as: |ZKA| +

D V

D I

. 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: |Z

[ |Z

) R1

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