Datasheet TL432LI-Q1 (Texas Instruments) - 3

TL431LI-Q1 TL432LI-Q1 www.ti.com
SNVSBA4A – MAY 2019 – REVISED NOVEMBER 2019
5 Device Comparison Table DEVICE PINOUT INITIAL ACCURACY OPERATING FREE-AIR TEMPERATURE (TA)
TL431LI-Q1 Q: -40°C to 125°C A: 1% B: 0.5% TL432LI-Q1 E: -40°C to 150°C
6 Pin Configuration and Functions TL431LI-Q1 DBZ Package 3-Pin SOT-23 TL432LI-Q1 DBZ Package Top View 3-Pin SOT-23 Top View
CATHODE 1 REF 1 3 ANODE 3 ANODE REF 2 CATHODE 2
Pin Functions PIN NUMBER NAME TL431LI-Q1 TL432LI-Q1 TYPE DESCRIPTION DBZ DBZ
ANODE 3 3 O Common pin, normally connected to ground CATHODE 1 2 I/O Shunt current/Voltage input REF 2 1 I Threshold relative to common anode Copyright © 2019, Texas Instruments Incorporated Submit Documentation Feedback 3 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