Overview
The TL431BIDE4 is a three-terminal adjustable shunt regulator produced by Texas Instruments. It is part of the TL431 series, known for its precision and versatility in various electronic applications. The TL431BIDE4 offers specified thermal stability over a wide range of temperatures, making it suitable for automotive, commercial, and military uses. This device allows for adjustable output voltage settings between approximately 2.5V and 36V using two external resistors, and it features active output circuitry with a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many scenarios.
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 (Q grade) | °C |
| Typical Temperature Drift | 6mV (C temp), 14mV (I temp, Q temp) | mV |
| Output Impedance | 0.2Ω (typical) | Ω |
| Sink-Current Capability | 1mA to 100mA | mA |
| Package Type | SOIC (D) | - |
| Pins | 8 | - |
Key Features
- Adjustable output voltage from approximately 2.5V to 36V using two external resistors.
- Active output circuitry with a sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
- Low output noise and typical output impedance of 0.2Ω.
- Sink-current capability from 1mA to 100mA.
- Operation over a wide temperature range: -40°C to 125°C (Q grade).
- Low temperature drift, ensuring good stability over the entire temperature range.
Applications
- On-board regulation and voltage monitoring.
- Adjustable power supplies and switching power supplies.
- Secondary side regulation in flyback SMPSs.
- Comparator with integrated reference.
- Automotive, commercial, and military applications due to its specified thermal stability.
Q & A
- What is the TL431BIDE4 used for?
The TL431BIDE4 is used as a three-terminal adjustable shunt regulator, suitable for on-board regulation, adjustable power supplies, switching power supplies, and other applications requiring precise voltage regulation.
- What is the adjustable output voltage range of the TL431BIDE4?
The output voltage can be set to any value between approximately 2.5V and 36V using two external resistors.
- What are the temperature ranges for the TL431BIDE4?
The device operates from -40°C to 125°C (Q grade), with different grades available for different temperature ranges.
- What is the typical output impedance of the TL431BIDE4?
The typical output impedance is 0.2Ω.
- What is the sink-current capability of the TL431BIDE4?
The sink-current capability ranges from 1mA to 100mA.
- Why is the TL431BIDE4 a good replacement for Zener diodes?
The TL431BIDE4 has active output circuitry with a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
- What are the different grades of the TL431 series?
The TL431 series is offered in three grades: B (0.5% tolerance), A (1% tolerance), and standard (2% tolerance) at 25°C.
- What is the typical temperature drift of the TL431BIDE4?
The typical temperature drift is 6mV (C temp) and 14mV (I temp, Q temp).
- What package types are available for the TL431BIDE4?
The TL431BIDE4 is available in an SOIC (D) package with 8 pins.
- What are some common applications of the TL431BIDE4?
Common applications include on-board regulation, adjustable power supplies, switching power supplies, and secondary side regulation in flyback SMPSs.
