Overview
The TL431ACPS is a three-terminal adjustable shunt regulator produced by Texas Instruments. It is part of the TL431 and TL432 series, known for their specified thermal stability over a wide range of temperatures, including automotive, commercial, and military environments. The device allows for adjustable output voltage between 2.5V and 36V using two external resistors, making it versatile for various applications such as on-board regulation, adjustable power supplies, and switching power supplies.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Input Voltage (Vref) | 2.44 - 2.495 | V |
| Adjustable Output Voltage | 2.5 to 36 | V |
| Sink Current Capability | 1 to 100 | mA |
| Typical Output Impedance | 0.2 Ω | Ω |
| Operating Temperature Range | 0 to 70 | °C |
| Temperature Drift | 6 mV (C temp), 14 mV (I temp, Q temp) | mV |
| Voltage Precision (at 25°C) | 1% (A grade) | % |
| Package Type | PDIP (8 pins) | |
| Package Quantity | Carrier 50, Tube |
Key Features
- Adjustable output voltage from 2.5V to 36V using two external resistors.
- Sink current capability from 1mA to 100mA.
- Typical output impedance of 0.2Ω.
- Low output noise.
- Operation from -40°C to 125°C for certain grades (e.g., TL431Q).
- Active output circuitry providing a sharp turn-on characteristic.
- AEC-Q100 qualified for automotive applications.
- Available in different grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
Applications
- On-board regulation.
- Adjustable power supplies.
- Switching power supplies.
- Automotive systems.
- Industrial applications.
- Power supply systems requiring precise voltage regulation.
Q & A
- What is the TL431ACPS used for? The TL431ACPS is used as an adjustable shunt regulator in various applications such as on-board regulation, adjustable power supplies, and switching power supplies.
- What is the adjustable output voltage range of the TL431ACPS? The output voltage can be set to any value between 2.5V and 36V using two external resistors.
- What is the sink current capability of the TL431ACPS? The sink current capability ranges from 1mA to 100mA.
- What is the typical output impedance of the TL431ACPS? The typical output impedance is 0.2Ω.
- What are the operating temperature ranges for the TL431ACPS? The operating temperature range for the TL431ACPS is 0°C to 70°C, but other grades (e.g., TL431Q) can operate from -40°C to 125°C.
- Is the TL431ACPS AEC-Q100 qualified? Yes, the TL431ACPS is AEC-Q100 qualified, making it suitable for automotive applications.
- What are the different grades of the TL431ACPS based on voltage precision? The TL431ACPS is available in different grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
- How does the TL431ACPS compare to Zener diodes? The TL431ACPS has active output circuitry providing a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
- What is the package type of the TL431ACPS? The TL431ACPS is packaged in an 8-pin PDIP (Plastic Dual In-Line Package).
- How is the TL431ACPS packaged for distribution? The TL431ACPS is packaged in carriers of 50 and tubes for protection.
