The component you mentioned, TL431ACDBZR , is a precision adjustable shunt regulator manufactured by Texas Instruments. Below, I’ll provide a detailed explanation of the pin functions, packaging, and an FAQ regarding the TL431ACDBZR. I'll also outline its pin configuration and functions.
TL431ACDBZR Pin Functions and Specifications
PackagingThe TL431ACDBZR comes in the SOT-23-3 package, a small surface-mount package with 3 pins.
Pinout of the TL431ACDBZR (SOT-23-3) Pin 1: Anode (A): The anode is the positive terminal of the shunt regulator. It is connected to the load or power source in the circuit. The voltage at this pin should be higher than the reference pin to regulate the output. Pin 2: Cathode (K): The cathode is the negative terminal of the TL431, which connects to the output of the circuit. This pin is typically tied to the reference or voltage divider circuit. Pin 3: Reference (Ref): The reference pin is the control input that sets the shunt regulator’s threshold voltage. Typically, a resistor divider is used between the anode and cathode to set the output voltage. Pin Functionality Table Pin Number Pin Name Pin Function Description 1 Anode (A) Connects to the positive side of the power supply or load. It receives the input voltage that will be regulated. 2 Cathode (K) Connects to the output side of the circuit and controls the voltage to maintain regulation based on the reference. 3 Reference (Ref) Sets the regulation threshold. When the voltage between the anode and cathode reaches a specific value, the regulator begins to conduct to maintain the output voltage. This pin controls the shunt regulator behavior and output voltage.Working Principle:
The TL431ACDBZR operates as a shunt voltage regulator. When the input voltage at the Anode pin exceeds the voltage at the Reference pin (which is usually set using an external resistor divider), the internal control loop starts to conduct current from the Anode to the Cathode, effectively regulating the voltage across the Cathode and Reference pins.
FAQ for TL431ACDBZR
Here is a list of 20 frequently asked questions (FAQs) about the TL431ACDBZR:
What is the TL431ACDBZR used for? The TL431ACDBZR is a precision adjustable shunt regulator used for regulating voltages in various circuits, such as power supplies and voltage reference applications. What is the voltage range for the TL431ACDBZR? The TL431ACDBZR can regulate voltages in the range of 2.495V to 36V, depending on the application and configuration. How many pins does the TL431ACDBZR have? The TL431ACDBZR has 3 pins: Anode (A), Cathode (K), and Reference (Ref). What is the maximum output voltage that can be regulated by the TL431ACDBZR? The maximum output voltage that can be regulated by the TL431ACDBZR depends on the design of the voltage divider and the supply voltage but is typically around 36V. Can the TL431ACDBZR be used for current regulation? The TL431ACDBZR is primarily designed for voltage regulation, not current regulation, although it can be part of a current-limiting circuit when used with additional components. What is the output tolerance of the TL431ACDBZR? The output voltage tolerance of the TL431ACDBZR is typically ±1% for a standard version. What is the maximum input voltage for the TL431ACDBZR? The maximum input voltage is typically 36V, but this can depend on the overall circuit design. How is the reference voltage set in the TL431ACDBZR? The reference voltage is set by the external resistor divider network between the Anode and Cathode. What is the quiescent current of the TL431ACDBZR? The quiescent current is typically 1mA when the device is in operation.Can the TL431ACDBZR be used in high-voltage circuits?
Yes, the TL431ACDBZR can be used in circuits with input voltages up to 36V.How do I calculate the output voltage of the TL431ACDBZR?
The output voltage is determined by the resistor ratio in the voltage divider connected between the Cathode and Reference pins.What type of load can the TL431ACDBZR handle?
The TL431ACDBZR can regulate voltages for a wide variety of loads, but it's most effective when the load current is relatively stable.Can I use the TL431ACDBZR for low-power circuits?
Yes, the TL431ACDBZR is suitable for low-power applications due to its low quiescent current.What is the maximum current through the TL431ACDBZR?
The maximum current through the Anode to Cathode pin is typically 100mA.How do I ensure stability when using the TL431ACDBZR?
To ensure stability, a capacitor is often added in parallel with the Cathode pin.Can I use the TL431ACDBZR in a feedback loop?
Yes, the TL431ACDBZR is commonly used in feedback loops for power supply regulation.Is the TL431ACDBZR available in other package types?
Yes, the TL431ACDBZR is available in several package types, including the TO-92, SOT-23, and DIP packages.What is the output impedance of the TL431ACDBZR?
The output impedance is typically around 0.3Ω when operating in regulation.What temperature range does the TL431ACDBZR support?
The TL431ACDBZR operates within a temperature range of -40°C to +125°C.Is the TL431ACDBZR a good choice for precision voltage reference applications?
Yes, the TL431ACDBZR is a good choice for precision voltage reference applications because of its low reference voltage tolerance.Summary Table of the Pin Functions
Pin Number Pin Name Pin Function Description 1 Anode (A) Positive terminal. Connects to the input side of the circuit. Provides the voltage that will be regulated. 2 Cathode (K) Negative terminal. Connects to the output side, where the regulated voltage is provided. 3 Reference (Ref) Sets the threshold voltage that the TL431ACDBZR regulates. Used with a resistor divider to set output voltage.Let me know if you need more details or clarifications!
