Datasheet TL432LI-Q1 (Texas Instruments) - 5

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TL431LI-Q1 TL432LI-Q1 www.ti.com
SNVSBA4A – MAY 2019 – REVISED NOVEMBER 2019
7.5 Electrical Characteristics
over recommended operating conditions, TA = 25°C (unless otherwise noted)
PARAMETER TEST CIRCUIT TEST CONDITIONS MIN TYP MAX UNIT
TL43xLIAx devices 2470 2495 2520 mV Vref Reference Voltage See Figure 14 VKA = Vref, IKA = 1 mA TL43xLIBx devices 2483 2495 2507 mV Deviation of reference TL43xLIxQ devices 10 27 mV VI(dev) input voltage over full See Figure 14 VKA = Vref, IKA = 1 mA temperature range (1) TL43xLIxE devices 14 34 mV Ratio of change in ΔVKA = 10 V - Vref –1.4 –2.7 mV/V ΔVref / reference voltage to the See Figure 15 I ΔV KA = 1 mA KA change in cathode ΔVKA = 36 V - 10 V –1 –2 mV/V voltage Iref Reference Input Current See Figure 15 IKA = 1 mA, R1 = 10kΩ, R2 = ∞ 0.2 0.4 µA Deviation of reference II(dev) input current over full See Figure 15 IKA = 1 mA, R1 = 10kΩ, R2 = ∞ 0.1 0.3 µA temperature range (1) Minimum cathode Imin See Figure 14 V current for regulation KA = Vref 0.6 mA Off-state cathode Ioff See Figure 16 V current KA = 36 V, Vref = 0 0.1 1 µA |ZKA| Dynamic Impedance (2) See Figure 14 VKA = Vref, IKA = 1 mA to 15 mA 0.3 0.75 Ω (1) The deviation parameters VI(dev) and II(dev) are defined as the differences between the maximum and minimum values obtained over the rated temperature range. For more details on VI(dev) and how it relates to the average temperature coefficient, see the Temperature Coefficient section. (2) The dynamic impedance is defined by |ZKA| = ΔVKA/ΔIKA. For more details on |ZKA| and how it relates to VKA, see the Temperature Coefficient section. Copyright © 2019, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: TL431LI-Q1 TL432LI-Q1 Document Outline 1 Features 2 Applications 3 Description Table of Contents 4 Revision History 5 Device Comparison Table 6 Pin Configuration and Functions 7 Specifications 7.1 Absolute Maximum Ratings 7.2 ESD Ratings 7.3 Recommended Operating Conditions 7.4 Thermal Information 7.5 Electrical Characteristics 7.6 Typical Characteristics 8 Parameter Measurement Information 8.1 Temperature Coefficient 8.2 Dynamic Impedance 9 Detailed Description 9.1 Overview 9.2 Functional Block Diagram 9.3 Feature Description 9.4 Device Functional Modes 9.4.1 Open Loop (Comparator) 9.4.2 Closed Loop 10 Applications and Implementation 10.1 Application Information 10.2 Typical Applications 10.2.1 Comparator With Integrated Reference 10.2.2 Design Requirements 10.2.3 Detailed Design Procedure 10.2.3.1 Basic Operation 10.2.3.2 Output Voltage and Logic Input Level 10.2.4 Application Curves 10.2.5 Precision LED Lighting Current Sink Regulator 10.2.5.1 Design Requirements 10.2.5.2 Detailed Design Procedure 10.2.6 Shunt Regulator/Reference 10.2.6.1 Design Requirements 10.2.6.2 Detailed Design Procedure 10.2.6.3 Application Curves 10.2.7 Isolated Flyback with Optocoupler 10.2.7.1 Design Requirements 10.2.7.2 Detailed Design Procedure 10.3 System Examples 11 Power Supply Recommendations 12 Layout 12.1 Layout Guidelines 12.2 Layout Example 13 Device and Documentation Support 13.1 Device Support 13.1.1 Device Nomenclature 13.2 Documentation Support 13.2.1 Related Documentation 13.3 Related Links 13.4 Receiving Notification of Documentation Updates 13.5 Support Resources 13.6 Trademarks 13.7 Electrostatic Discharge Caution 13.8 Glossary 14 Mechanical, Packaging, and Orderable Information