Overview
The TL431BILPRE3 is a precision adjustable shunt regulator produced by Texas Instruments. This device is part of the TL431 family, known for its high accuracy and thermal stability. The TL431BILPRE3 is particularly suited for applications requiring adjustable output voltages and high precision voltage regulation.
It operates over a wide temperature range, making it suitable for various environments, including automotive, commercial, and military applications. The device features a three-terminal configuration, allowing for easy integration into various circuit designs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage Tolerance at 25°C | 0.5% (B grade), 1% (A grade), 2% (Standard grade) | % |
| Adjustable Output Voltage | Vref to 36V | V |
| Operating Temperature Range | −40°C to 125°C | °C |
| Typical Temperature Drift | 6 mV (C temp), 14 mV (I temp, Q temp) | mV |
| Output Impedance | 0.2 Ω | Ω |
| Sink-Current Capability | 1 mA to 100 mA | mA |
| Package Type | TO-92 |
Key Features
- Adjustable Output Voltage: The output voltage can be set to any value between Vref (approximately 2.5V) and 36V using two external resistors.
- High Precision: Available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
- Low Output Noise: Ensures stable voltage regulation with minimal noise.
- Low Output Impedance: Typical output impedance of 0.2 Ω.
- Wide Temperature Range: Operates from −40°C to 125°C, making it suitable for various environmental conditions.
- Sharp Turn-On Characteristic: Active output circuitry provides a very sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
Applications
- On-Board Regulation: Used for local voltage regulation on circuit boards.
- Adjustable Power Supplies: Ideal for applications requiring adjustable output voltages.
- Switching Power Supplies: Used in switching power supply designs for efficient voltage regulation.
- Rack Server Power: Suitable for power supply designs in rack servers.
- Industrial AC/DC and AC Inverter & VF Drives: Used in industrial power conversion applications.
- Servo Drive Control Modules: Applied in servo drive control systems for precise voltage regulation.
- Notebook PC Power Adapters: Used in power adapter designs for notebook PCs.
Q & A
- What is the TL431BILPRE3 used for?
The TL431BILPRE3 is used as a precision adjustable shunt regulator in various applications requiring high accuracy voltage regulation.
- What are the different grades of the TL431 available?
The TL431 is available in three grades: B grade with 0.5% tolerance, A grade with 1% tolerance, and standard grade with 2% tolerance at 25°C.
- What is the adjustable output voltage range of the TL431BILPRE3?
The output voltage can be adjusted between Vref (approximately 2.5V) and 36V using two external resistors.
- What is the operating temperature range of the TL431BILPRE3?
The device operates from −40°C to 125°C.
- What is the typical output impedance of the TL431BILPRE3?
The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431BILPRE3?
The sink-current capability ranges from 1 mA to 100 mA.
- Can the TL431BILPRE3 replace Zener diodes in some applications?
Yes, the TL431BILPRE3 can replace Zener diodes due to its sharp turn-on characteristic and high precision voltage regulation.
- What are some common applications of the TL431BILPRE3?
Common applications include on-board regulation, adjustable power supplies, switching power supplies, rack server power, industrial AC/DC and AC inverter & VF drives, servo drive control modules, and notebook PC power adapters.
- What package type is the TL431BILPRE3 available in?
The TL431BILPRE3 is available in the TO-92 package type.
- How does the TL431BILPRE3 ensure thermal stability?
The device is characterized for operation over a wide temperature range and has low output drift versus temperature, ensuring good stability over the entire temperature range.
