Overview
The TL431ACPWR, produced by Texas Instruments, is a three-terminal adjustable shunt regulator known for its high precision and thermal stability. This device is part of the TL431 series, which includes various grades with different initial voltage tolerances. The TL431ACPWR is particularly useful in applications requiring adjustable output voltages and high stability over a wide temperature range.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Input Voltage (Vref) | 2.44 to 2.495 | V |
| Adjustable Output Voltage Range | Vref to 36 V | V |
| Sink Current Capability | 1 to 100 mA | mA |
| Typical Output Impedance | 0.2 Ω | Ω |
| Operating Temperature Range | -40°C to +125°C | °C |
| Voltage Precision (at 25°C) | 0.5% (B grade), 1% (A grade), 2% (Standard grade) | % |
| Temperature Drift | 6 mV (C temp), 14 mV (I temp, Q temp) | mV |
| Package Type | SOIC (D) - 8 pins |
Key Features
- Active output circuitry providing a sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
- Adjustable output voltage from Vref (approximately 2.5 V) to 36 V using two external resistors.
- High thermal stability over the entire operating temperature range.
- Low output noise and typical output impedance of 0.2 Ω.
- Sink current capability from 1 mA to 100 mA.
- AEC-Q100 qualified for automotive applications.
- Available in different grades with initial voltage tolerances of 0.5%, 1%, and 2% at 25°C.
Applications
- On-board regulation.
- Adjustable power supplies.
- Switching power supplies.
- Automotive systems.
- Industrial power systems.
Q & A
- What is the TL431ACPWR?
The TL431ACPWR is a three-terminal adjustable shunt regulator produced by Texas Instruments.
- What is the adjustable output voltage range of the TL431ACPWR?
The output voltage can be set to any value between Vref (approximately 2.5 V) and 36 V using two external resistors.
- What are the temperature ranges for the TL431ACPWR?
The device operates from -40°C to +125°C.
- What is the typical output impedance of the TL431ACPWR?
The typical output impedance is 0.2 Ω.
- What are the sink current capabilities of the TL431ACPWR?
The device can sink current from 1 mA to 100 mA.
- Is the TL431ACPWR AEC-Q100 qualified?
Yes, the TL431ACPWR is AEC-Q100 qualified for automotive applications.
- What are the different grades of the TL431 series?
The TL431 series is available in B, A, and standard grades with initial voltage tolerances of 0.5%, 1%, and 2% at 25°C, respectively.
- What are some common applications of the TL431ACPWR?
Common applications include on-board regulation, adjustable power supplies, switching power supplies, automotive systems, and industrial power systems.
- How does the TL431ACPWR compare to Zener diodes?
The TL431ACPWR 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 TL431ACPWR?
The TL431ACPWR is available in an SOIC (D) package with 8 pins.
