NCP431A, SC431A, NCP431B, SC431B, NCP432B, SC432B Series
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3
ELECTRICAL CHARACTERISTICS (T
A
= 25°C, unless otherwise noted.)
Symbo
Characteristic
NCP431AC NCP431AI
NCP431AV/
SC431AV
Uni
Min Typ Max Min Typ Max Min Typ Max
V
ref
Reference Input Voltage
V
KA
= V
ref
, I
K
= 1 mA
T
A
= 25°C
T
A
= T
low
to T
high
(Figure 3, Note 2)
2.475
2.475
2.500
2.500
2.525
2.525
2.475
2.465
2.500
2.500
2.525
2.525
2.475
2.460
2.500
2.500
2.525
2.525
V
DV
refT
Reference Input Voltage Deviation Over Temperat-
ure Range (Figure 3, Notes 3, 4)
V
KA
= V
ref
, I
K
= 1 mA
− − − − 5.0 10 − 10 15 mV
DV
ref
DV
KA
Ratio of Change in Reference Input Voltage to
Change in Cathode to Anode Voltage
I
K
= 1 mA (Figure 4),
DV
KA
= 10 V to V
ref
DV
KA
= 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/
V
I
ref
Reference Input Current (Figure 4)
I
K
= 1 mA, R1 = 220 k, R2 = R
T
A
= −40°C to +125°C
− 81 190 − 81 190 − 81 190
nA
DI
refT
Reference Input Current Deviation Over Temperat-
ure Range (Figure 4, Note 3)
I
K
= 1 mA, R1 = 10 k, R2 = R
− 22 55 − 22 55 − 22 55
nA
I
min
Minimum Cathode Current For Regulation
V
KA
= V
ref
(Figure 3)
−
40
60 −
40 60
−
40 60 mA
I
off
Off−State Cathode Current (Figure 5)
V
KA
= 36 V, V
ref
= 0 V
− 180 1000 − 180 1000 − 180 1000 nA
|Z
KA
| Dynamic Impedance (Figure 3, Note 5)
V
KA
= V
ref
, DI
K
= 1.0 mA to 100 mA
f v 1.0 kHz
− 0.22 0.5 − 0.22 0.5 − 0.22 0.5
W
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
2. T
low
= −40°C for NCP431AI, NCP431AV, SC431AV
= 0°C for NCP431AC
T
high
= 70°C for NCP431AC
= 85°C for NCP431AI
= 125°C for NCP431AV, SC431AV
3. Guaranteed by design
4. The deviation parameter DV
refT
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:
V
ref
ppm
° C
+
ǒ
DV
ref
V
ref
@25° C
Ǔ
10
6
DT
A
+
DV
ref
10
6
DT
A
ǒ
V
ref
@25° C
Ǔ
aVref can be positive or negative depending on whether Vref Min or Vref Max occurs at the lower ambient temperature.
Example: DV
refT
= 17 mV and slope is positive
V
ref
= 2.5 V, DT
A
= 165°C (from −40°C to +125°C)
aV
ref
+
0.017 @ 10
6
165 @ 2.5
+ 41.2 ppmń° C
5. The dynamic impedance Z
KA
is defined as: (|Z
KA
| = (DV
KA
/DI
K
). When the device is programmed with two external resistors, R1 and R2,
the total dynamic impedance of the circuit is defined as: |Z
KA
’| [ |Z
KA
| (1 + (R1/R2)).
6. SC431AVSNT1G − T
low
= −40°C, T
high
= 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.
