Datasheet TL431A, TL431B, NCV431A, NCV431B, SCV431A (ON Semiconductor) - 3

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TL431A, B Series, NCV431A, B Series, SCV431A THERMAL CHARACTERISTICS D, LP Suffix P Suffix DM Suffix Characteristic Symbol Package Package Package Unit
Thermal Resistance, Junction-to-Ambient RqJA 178 114 240 °C/W Thermal Resistance, Junction-to-Case RqJC 83 41 − °C/W
ELECTRICAL CHARACTERISTICS
(TA = 25 °C, unless otherwise noted.)
TL431I TL431C Characteristic Symbol Min Typ Max Min Typ Max Unit
Reference Input Voltage (Figure 1) Vref V VKA = Vref, IK = 10 mA TA = 25 °C 2.44 2.495 2.55 2.44 2.495 2.55 TA = Tlow to Thigh (Note 2) 2.41 − 2.58 2.423 − 2.567 Reference Input Voltage Deviation Over DVref − 7.0 30 − 3.0 17 mV Temperature Range (Figure 1, Notes 3, 4) VKA= Vref, IK = 10 mA Ratio of Change in Reference Input Voltage to Change DV mV/V in Cathode to Anode Voltage ref I DV K = 10 mA (Figure 2), KA 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) Iref mA IK = 10 mA, R1 = 10 k, R2 = ∞ TA = 25 °C − 1.8 4.0 − 1.8 4.0 TA = Tlow to Thigh (Note 2) − − 6.5 − − 5.2 Reference Input Current Deviation Over DIref − 0.8 2.5 − 0.4 1.2 mA Temperature Range (Figure 2, Note 3) IK = 10 mA, R1 = 10 k, R2 = ∞ Minimum Cathode Current For Regulation Imin − 0.5 1.0 − 0.5 1.0 mA VKA = Vref (Figure 1) Off-State Cathode Current (Figure 3) Ioff − 20 1000 − 20 1000 nA VKA = 36 V, Vref = 0 V Dynamic Impedance (Figure 1, Note 5) |ZKA| − 0.22 0.5 − 0.22 0.5 W VKA = Vref, DIK = 1.0 mA to 100 mA, f ≤ 1.0 kHz 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. 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 3. Guaranteed by design. 4. 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 DVref = Vref max -Vref min DTA = T2 - T1 Vref min T1 T2 Ambient Temperature ǒ DVref ǓX106 V ppm ref @ 25_C D Vref x 106 The average temperature coefficient of the reference input voltage, aVref is defined as: Vref + _C + D TA 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, V 0.008 x 106 ref @ 25_C + 2.495 V, DTA + 70_C a Vref + + 45.8 ppmń_C 70 (2.495) D V 5. The dynamic impedance Z KA KA is defined as: |ZKA| + . When the device is programmed with two external resistors, R1 and R2, D IK (refer to Figure 2) the total dynamic impedance of the circuit is defined as: |Z Ǔ KAȀ| [ |ZKA| ǒ 1 ) R1 R2
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