Description
The TL431 is an adjustable precision shunt regulator IC widely used in power supply circuits, voltage reference circuits, battery chargers, SMPS feedback circuits, voltage monitoring, and electronics projects. It works like an adjustable Zener diode with much better accuracy and stability.
TL431 Adjustable Precision Shunt Regulator IC একটি জনপ্রিয় voltage reference ও shunt regulator IC, যা power supply, battery charger, SMPS feedback, voltage monitoring এবং DIY electronics project-এ ব্যবহৃত হয়। এটি adjustable Zener diode-এর মতো কাজ করে, তবে accuracy ও stability অনেক ভালো।
This component is commonly used by electronics learners, technicians, engineers, and power supply designers for voltage regulation and feedback control applications.
Key Features | প্রধান বৈশিষ্ট্য
- Adjustable precision shunt regulator
- Works like a programmable Zener diode
- Reference voltage around 2.5V
- Adjustable output voltage using external resistors
- Commonly used in SMPS feedback circuits
- Stable voltage reference for power electronics
- Low-cost and reliable component
- TO-92 package for easy breadboard and PCB use
- Suitable for battery charger and voltage monitoring circuits
Applications | ব্যবহার ক্ষেত্র
- SMPS feedback circuit
- Battery charger circuit
- Adjustable voltage reference
- Power supply regulation
- Over-voltage protection circuit
- Voltage monitoring circuit
- Constant current circuit
- LED driver feedback
- DIY electronics project
- Arduino power supply monitoring circuit
- Electronics repair and prototyping
Package Includes | প্যাকেজে যা থাকছে
- 4 × TL431 Adjustable Precision Shunt Regulator IC
Specifications | স্পেসিফিকেশন
- Product Type: Adjustable Shunt Regulator IC
- Model: TL431
- Package Type: TO-92
- Reference Voltage: Approximately 2.495V / 2.5V
- Adjustable Output Range: Commonly 2.5V to 36V with external resistors
- Function: Voltage reference / shunt regulator
- Pin Count: 3 pins
- Common Pins: Reference, Anode, Cathode
- Application: SMPS, battery charger, voltage reference, regulator circuit
Pin Description | পিন পরিচিতি
The TL431 normally has 3 pins:
- Reference / REF – Voltage sensing input
- Anode / A – Negative side / ground reference
- Cathode / K – Regulated output side
Pin order may vary depending on manufacturer and package marking. Always check the datasheet or test pinout before using in a circuit.
How It Works | কীভাবে কাজ করে
The TL431 compares the voltage at its reference pin with its internal reference voltage. When the reference pin reaches around 2.5V, the IC starts conducting between cathode and anode. By using external resistors, it can regulate or monitor higher voltages.
TL431-এর reference pin-এ প্রায় 2.5V আসলে IC cathode এবং anode-এর মধ্যে conduct করতে শুরু করে। External resistor divider ব্যবহার করে বিভিন্ন voltage level control বা monitor করা যায়।
Why Use TL431 Instead of a Normal Zener Diode?
A normal Zener diode can be used for simple voltage reference, but TL431 provides better accuracy, better stability, and adjustable voltage control. That is why TL431 is widely used in SMPS power supplies and battery charger circuits.
সাধারণ Zener diode দিয়ে voltage reference করা যায়, কিন্তু TL431 বেশি accurate, stable এবং adjustable। তাই SMPS, charger এবং power control circuit-এ TL431 বেশি ব্যবহৃত হয়।
Important Notes | গুরুত্বপূর্ণ নোট
- TL431 is not a normal transistor.
- It is an adjustable shunt regulator IC.
- Use proper external resistors for desired voltage setting.
- Check pinout before soldering or breadboard use.
- Do not exceed the rated voltage/current limit.
- Product marking may vary depending on manufacturer batch.
- For SMPS repair, match circuit rating before replacement.
Frequently Asked Questions | FAQ
Q1: What is TL431 used for?
TL431 is used as a voltage reference, adjustable shunt regulator, SMPS feedback component, battery charger regulator, and voltage monitoring IC.
Q2: Is TL431 a Zener diode?
It is not a normal Zener diode, but it works like an adjustable precision Zener reference.
Q3: What is the reference voltage of TL431?
The reference voltage is approximately 2.5V.
Q4: Can I use TL431 in power supply circuits?
Yes. TL431 is widely used in SMPS and regulated power supply feedback circuits.
Q5: Is it suitable for battery charger circuits?
Yes. It can be used in battery charger voltage control and feedback circuits.
Q6: What package is this IC?
This version is commonly supplied in TO-92 package.
TL431 Adjustable Precision Shunt Regulator IC TO-92 Voltage Reference
Buy TL431 adjustable precision shunt regulator IC in TO-92 package. Ideal for SMPS feedback, voltage reference, battery charger, power supply and electronics projects.
