SC431B datasheet(3/17 Pages) ONSEMI

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NCP431A, SC431A, NCP431B, SC431B, NCP432B, SC432B Series

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

Symbol

Characteristic

NCP431AC

NCP431AI

NCP431AV/

SC431AV

Unit

Min

Typ

Max

Min

Typ

Max

Min

Typ

Max

Vref

Reference Input Voltage

VKA = Vref, IK = 1 mA

TA = 25°C

TA = Tlow to Thigh (Figure 3, Note 2)

2.475

2.500

2.525

2.475

2.465

2.500

2.525

2.475

2.460

2.500

2.525

DVrefT

Reference Input Voltage Deviation Over Temperat-

ure Range (Figure 3, Notes 3, 4)

VKA= Vref, IK = 1 mA

−

5.0

−

DVref

DVKA

Ratio of Change in Reference Input Voltage to

Change in Cathode to Anode Voltage

IK = 1 mA (Figure 4),

DVKA = 10 V to Vref

DVKA = 36 V to 10 V

−

−1.85

−0.80

−3.1

−1.8

−

−1.85

−0.80

−3.1

−1.8

−

−1.85

−0.80

−3.1

−1.8

mV/

Iref

Reference Input Current (Figure 4)

IK = 1 mA, R1 = 220 k, R2 = R

TA = −40°C to +125°C

−

190

−

190

−

190

DIrefT

Reference Input Current Deviation Over Temperat-

ure Range (Figure 4, Note 3)

IK = 1 mA, R1 = 10 k, R2 = R

−

Imin

Minimum Cathode Current For Regulation

VKA = Vref (Figure 3)

−

Ioff

Off−State Cathode Current (Figure 5)

VKA = 36 V, Vref = 0 V

−

180

1000

−

180

1000

−

180

1000

|ZKA|

Dynamic Impedance (Figure 3, Note 5)

VKA = Vref, DIK = 1.0 mA to 100 mA

v 1.0 kHz

−

0.22

0.5

−

0.22

0.5

−

0.22

0.5

2. Tlow

= −40

°C for NCP431AI, NCP431AV, SC431AV

= 0

°C for NCP431AC

Thigh = 70°C for NCP431AC

= 85

°C for NCP431AI

= 125

°C for NCP431AV, SC431AV

3. Guaranteed by design

4. The deviation parameter

DVrefT is defined as the difference 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, Vref is defined as:

ref

ppm

° C

ref

@25

° C

106

ref

106

ref

@25

° C

aVref can be positive or negative depending on whether Vref Min or Vref Max occurs at the lower ambient temperature.

Example:

DVrefT = 17 mV and slope is positive

Vref = 2.5 V, DTA = 165°C (from −40°C to +125°C)

ref +

0.017

@ 106

165

@ 2.5

+ 41.2 ppm ° C

5. The dynamic impedance ZKA is defined as: (|ZKA| = (DVKA/DIK). When the device is programmed with two external resistors, R1 and R2,

the total dynamic impedance of the circuit is defined as: |ZKA’| [ |ZKA| (1 + (R1/R2)).

6. SC431AVSNT1G − Tlow = −40°C, Thigh = 125°C. Guaranteed by design. SC Prefix for Automotive and Other Applications Requiring Unique

Site and Control Change Requirements; AEC−Q100 Qualified and PPAP Capable.

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