TL431ACD View Datasheet(PDF) - ON Semiconductor
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TL431ACD Datasheet PDF : 19 Pages
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TL431, A, B Series, NCV431A, B
ELECTRICAL CHARACTERISTICS (TA = 25°C, unless otherwise noted.)
TL431I
TL431C
Characteristic
Reference Input Voltage (Figure 1)
VKA = Vref, IK = 10 mA
TA = 25°C
TA = Tlow to Thigh (Note 1)
Symbol Min
Typ Max Min
Typ Max Unit
Vref
V
2.44 2.495 2.55 2.44 2.495 2.55
2.41
−
2.58 2.423
−
2.567
Reference Input Voltage Deviation Over
Temperature Range (Figure 1, Notes 1, 2)
VKA= Vref, IK = 10 mA
DVref
−
7.0
30
−
3.0
17
mV
Ratio of Change in Reference Input Voltage to Change
in Cathode to Anode Voltage
IK = 10 mA (Figure 2),
DVref
DVKA
mV/V
DVKA = 10 V to Vref
−
−1.4 −2.7
−
−1.4 −2.7
DVKA = 36 V to 10 V
−
−1.0 −2.0
−
−1.0 −2.0
Reference Input Current (Figure 2)
IK = 10 mA, R1 = 10 k, R2 = ∞
TA = 25°C
TA = Tlow to Thigh (Note 1)
Iref
mA
−
1.8
4.0
−
1.8
4.0
−
−
6.5
−
−
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
mA
Minimum Cathode Current For Regulation
VKA = Vref (Figure 1)
Imin
−
0.5
1.0
−
0.5
1.0
mA
Off−State Cathode Current (Figure 3)
VKA = 36 V, Vref = 0 V
Ioff
−
20
1000
−
20
1000
nA
Dynamic Impedance (Figure 1, Note 3)
VKA = Vref, DIK = 1.0 mA to 100 mA
f ≤ 1.0 kHz
|ZKA|
−
0.22
0.5
−
0.22
0.5
W
1. Tlow = −40°C for TL431AIP TL431AILP, TL431IP, TL431ILP, TL431BID, TL431BIP, TL431BILP, TL431AIDM, TL431IDM, TL431BIDM;
= 0°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.
Vref max
Vref min
DVref = Vref max
−Vref min
DTA = T2 − T1
T1 Ambient Temperature T2
The average temperature coefficient of the reference input voltage, aVref is defined as:
ǒ Ǔ ppm
Vref _C +
D Vref
Vref @ 25_C
D TA
X 106
+
D Vref x 106
D TA (Vref @ 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 : DVref + 8.0 mV and slope is positive,
Vref @ 25_C + 2.495 V, DTA + 70_C
a
Vref
+
0.008 x 106
70 (2.495)
+
45.8
ppmń_C
3. The dynamic impedance ZKA is defined as: |ZKA| + DDVIKKA. When the device is programmed with two external resistors, R1 and R2,
ǒ Ǔ (refer to Figure 2) the total dynamic impedance of the circuit is defined as: |ZKAȀ| [ |ZKA|
1
)
R1
R2
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