Datasheet TLA432 (Texas Instruments) - 10
| Fabricante | Texas Instruments |
| Descripción | All-capacitor stable precision programmable reference with RKA pin layout |
| Páginas / Página | 31 / 10 — TLA431, TLA432. www.ti.com. 7.2 Dynamic Impedance. Figure 7-4. Dynamic … |
| Formato / tamaño de archivo | PDF / 1.2 Mb |
| Idioma del documento | Inglés |
TLA431, TLA432. www.ti.com. 7.2 Dynamic Impedance. Figure 7-4. Dynamic Impedance
Línea de modelo para esta hoja de datos
Versión de texto del documento
link to page 7 link to page 10 link to page 10
TLA431, TLA432
SNVSCR4A – JULY 2024 – REVISED OCTOBER 2024
www.ti.com 7.2 Dynamic Impedance
' K V A K Z A The dynamic impedance is defined as ' K I A . When the device is operating with two external resistors 'V z' (see Figure 6-8), the total dynamic impedance of the circuit is given by 'I , which is approximately equal to § R1 · K Z A ¨1 ¸ © R2 ¹ . The VKA of the device can be affected by the dynamic impedance. The device test current Itest for VKA is specified in the Electrical Characteristics. Any deviation from Itest can cause deviation on the output VKA. Figure 7-4 shows the effect of the dynamic impedance on the VKA. ) A (m A I I K test / P IKA IKA(min) 0 VKA (V) Ps
Figure 7-4. Dynamic Impedance
10 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated Product Folder Links: TLA431 TLA432 Document Outline 1 Features 2 Applications 3 Description Table of Contents 4 Device Comparison Table 5 Pin Configuration and Functions 6 Specifications 6.1 Absolute Maximum Ratings 6.2 ESD Ratings 6.3 Recommended Operating Conditions 6.4 Thermal Information 6.5 Electrical Characteristics 6.6 Typical Characteristics 7 Parameter Measurement Information 7.1 Temperature Coefficient 7.2 Dynamic Impedance 8 Detailed Description 8.1 Overview 8.2 Functional Block Diagram 8.3 Feature Description 8.4 Device Functional Modes 8.4.1 Closed Loop 8.4.1.1 Stability (Closed Loop) 8.4.2 Open Loop (Comparator) 9 Applications and Implementation 9.1 Application Information 9.2 Typical Applications 9.2.1 Shunt Regulator/Reference 9.2.1.1 Design Requirements 9.2.1.2 Detailed Design Procedure 9.2.1.2.1 Programming Output/Cathode Voltage 9.2.1.2.2 Total Accuracy 9.2.1.2.3 Start-Up Time 9.2.1.3 Application Curve 9.2.2 Comparator With Integrated Reference 9.2.2.1 Design Requirements 9.2.2.2 Detailed Design Procedure 9.2.2.2.1 Basic Operation 9.2.2.2.1.1 Overdrive 9.2.2.2.2 Output Voltage and Logic Input Level 9.2.2.2.2.1 Input Resistance 9.2.2.3 Application Curve 9.3 System Examples 9.4 Power Supply Recommendations 9.5 Layout 9.5.1 Layout Guidelines 9.5.2 Layout Example 10 Device and Documentation Support 10.1 Device Nomenclature 10.2 Related Links 10.3 Receiving Notification of Documentation Updates 10.4 Support Resources 10.5 Trademarks 10.6 Electrostatic Discharge Caution 10.7 Glossary 11 Revision History 12 Mechanical, Packaging, and Orderable Information
TLA431, TLA432
SNVSCR4A – JULY 2024 – REVISED OCTOBER 2024
www.ti.com 7.2 Dynamic Impedance
' K V A K Z A The dynamic impedance is defined as ' K I A . When the device is operating with two external resistors 'V z' (see Figure 6-8), the total dynamic impedance of the circuit is given by 'I , which is approximately equal to § R1 · K Z A ¨1 ¸ © R2 ¹ . The VKA of the device can be affected by the dynamic impedance. The device test current Itest for VKA is specified in the Electrical Characteristics. Any deviation from Itest can cause deviation on the output VKA. Figure 7-4 shows the effect of the dynamic impedance on the VKA. ) A (m A I I K test / P IKA IKA(min) 0 VKA (V) Ps
Figure 7-4. Dynamic Impedance
10 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated Product Folder Links: TLA431 TLA432 Document Outline 1 Features 2 Applications 3 Description Table of Contents 4 Device Comparison Table 5 Pin Configuration and Functions 6 Specifications 6.1 Absolute Maximum Ratings 6.2 ESD Ratings 6.3 Recommended Operating Conditions 6.4 Thermal Information 6.5 Electrical Characteristics 6.6 Typical Characteristics 7 Parameter Measurement Information 7.1 Temperature Coefficient 7.2 Dynamic Impedance 8 Detailed Description 8.1 Overview 8.2 Functional Block Diagram 8.3 Feature Description 8.4 Device Functional Modes 8.4.1 Closed Loop 8.4.1.1 Stability (Closed Loop) 8.4.2 Open Loop (Comparator) 9 Applications and Implementation 9.1 Application Information 9.2 Typical Applications 9.2.1 Shunt Regulator/Reference 9.2.1.1 Design Requirements 9.2.1.2 Detailed Design Procedure 9.2.1.2.1 Programming Output/Cathode Voltage 9.2.1.2.2 Total Accuracy 9.2.1.2.3 Start-Up Time 9.2.1.3 Application Curve 9.2.2 Comparator With Integrated Reference 9.2.2.1 Design Requirements 9.2.2.2 Detailed Design Procedure 9.2.2.2.1 Basic Operation 9.2.2.2.1.1 Overdrive 9.2.2.2.2 Output Voltage and Logic Input Level 9.2.2.2.2.1 Input Resistance 9.2.2.3 Application Curve 9.3 System Examples 9.4 Power Supply Recommendations 9.5 Layout 9.5.1 Layout Guidelines 9.5.2 Layout Example 10 Device and Documentation Support 10.1 Device Nomenclature 10.2 Related Links 10.3 Receiving Notification of Documentation Updates 10.4 Support Resources 10.5 Trademarks 10.6 Electrostatic Discharge Caution 10.7 Glossary 11 Revision History 12 Mechanical, Packaging, and Orderable Information