Overview
The TL431KA-TP, produced by Micro Commercial Co, is a three-terminal adjustable shunt regulator. This device is part of the TL431 series, known for its programmable output voltage and thermal stability over a wide operating temperature range. The TL431KA-TP is designed to provide a stable voltage reference and can be used in a variety of applications where precise voltage regulation is required.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Cathode Voltage | VKA | VREF - 36 | 37 | V | |
| Cathode Current Range | IKA | 1.0 | 100 | mA | |
| Reference Input Voltage | VREF | 2.44 | 2.495 | 2.55 | V |
| Dynamic Output Impedance | ZKA | 0.15 | 0.22 | 0.5 | Ω |
| Operating Temperature Range | TOPR | -25 | 85 | °C | |
| Junction Temperature | TJ | 150 | °C | ||
| Storage Temperature Range | TSTG | -65 | 150 | °C |
Key Features
- Programmable Output Voltage: The output voltage can be set to any value between 2.5 V and 36 V using two external resistors.
- Low Dynamic Output Impedance: Typical dynamic output impedance of 0.22 Ω, ensuring stable voltage regulation.
- Sink Current Capability: Can sink currents from 1 mA to 100 mA.
- Temperature Stability: Guaranteed thermal stability over the entire operating temperature range.
- Low Output Noise Voltage: Minimized noise voltage for precise voltage regulation.
- Fast Turn-on Response: Active output circuitry provides a sharp turn-on characteristic, making it an excellent replacement for zener diodes in many applications.
- AEC-Q100 Qualified (for automotive versions): Suitable for automotive applications with an extended temperature range of -40 °C to +125 °C.
Applications
- Power Supplies: Used in shunt regulator configurations to provide stable voltage references.
- Industrial Control Systems: Employed in various industrial applications requiring precise voltage regulation.
- Automotive Systems: AEC-Q100 qualified versions are suitable for automotive applications.
- Current Limiting and Current Sources: Can be configured to act as current limiters or current sources.
- High Current Shunt Regulators: Used in high current shunt regulator configurations.
Q & A
- What is the TL431KA-TP used for?
The TL431KA-TP is used as a programmable shunt voltage regulator, providing a stable voltage reference in various applications.
- What is the adjustable output voltage range of the TL431KA-TP?
The output voltage can be set to any value between 2.5 V and 36 V using two external resistors.
- What is the typical dynamic output impedance of the TL431KA-TP?
The typical dynamic output impedance is 0.22 Ω.
- What is the sink current capability of the TL431KA-TP?
The device can sink currents from 1 mA to 100 mA.
- What is the operating temperature range of the TL431KA-TP?
The operating temperature range is -25 °C to +85 °C, with extended ranges for automotive versions.
- Is the TL431KA-TP suitable for automotive applications?
Yes, AEC-Q100 qualified versions are suitable for automotive applications with an extended temperature range of -40 °C to +125 °C.
- How does the TL431KA-TP compare to zener diodes?
The TL431KA-TP provides a sharper turn-on characteristic and lower noise, making it an excellent replacement for zener diodes in many applications.
- What are some common applications of the TL431KA-TP?
Common applications include power supplies, industrial control systems, automotive systems, current limiting, and high current shunt regulators.
- What is the reference input voltage of the TL431KA-TP?
The reference input voltage (VREF) is approximately 2.495 V.
- How is the output voltage of the TL431KA-TP programmed?
The output voltage is programmed using two external resistors connected to the reference and cathode terminals.
