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Texas Instruments TL431AIPK Environmental and export classification status description

The TL431AIPK is a three-terminal adjustable shunt voltage reference. It can be configured to operate as a precision reference, error amplifier, or in feedback loops for various applications. The device offers low output impedance, good temperature stability, and low drift, making it useful for high-precision tasks. Functions 1. Programmable Voltage Reference: Provides a stable voltage reference that can be adjusted with external resistors. 2. Zener Functionality: Acts like a Zener diode but with better performance and accuracy. 3. Shunt Regulator: Can be used to maintain a constant voltage in the circuit. 4. Error Amplifier: Can be integrated into feedback loops of power supply circuits. Applications - Switching Power Supplies: Used for feedback regulation and error correction. - Battery Chargers: Provides voltage regulation for charging lithium-ion and other batteries. - Telecommunications Equipment: For maintaining stable voltages in low-voltage circuits. - Consumer Electronics: Commonly found in adapters and power supplies for various appliances. Alternative Parts 1. LM431: Similar in functionality but with different specifications. 2. TLV431: A lower voltage reference option with similar features. 3. MAX160: An alternative voltage reference device with variations in specifications. Embedded Modules While the TL431 itself is an integrated circuit, it can be embedded within larger modules and systems, including: - Power Management Modules: For regulating power in portable and embedded devices. - DC-DC Converter Boards: Where precision voltage regulation is vital. - Communication Interface Boards: Maintaining stability in voltage across multiple interfaces. Related Q&A 1. Q: What is the output voltage range of the TL431AIPK? A: The output voltage can be adjusted from 2.5V to the maximum supply voltage, depending on the resistor configuration used. 2. Q: How does the TL431AIPK provide temperature stability in its output voltage? A: The device features internal bandgap references and compensation for temperature variations, providing a stable output across a specified temperature range. 3. Q: Can the TL431AIPK be used in high-frequency applications? A: Yes, the TL431 is designed to respond quickly and can be utilized in high-frequency applications, although proper design considerations must be taken into account to avoid parasitic capacitances and inductances. 4. Q: What are the typical applications for the TL431? A: Typical applications include switching power supplies, power adapters, battery chargers, and voltage reference in measurement and control systems. 5. Q: How do you configure the TL431AIPK as a shunt regulator? A: You can configure it by connecting the reference pin to a voltage divider which sets the output voltage, allowing the device to shunt excess voltage to ground when the output exceeds the set reference voltage.