Overview
The TL431AIP from Texas Instruments is a three-terminal adjustable shunt regulator, designed to provide a stable and adjustable reference voltage. Introduced in 1978, this component has been widely used in various applications requiring precise voltage regulation. The TL431AIP is housed in an 8-pin PDIP (Plastic Dual In-Line Package) and is compliant with EU RoHS and automotive standards.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Reference Voltage (Vref) | 2440 | 2495 | 2550 | mV |
| Cathode Voltage (VKA) | - | - | 37 | V |
| Continuous Cathode Current (IKA) | -100 | - | 150 | mA |
| Reference Input Current (II(ref)) | -0.05 | - | 10 | mA |
| Operating Junction Temperature (TJ) | -40 | - | 125 | °C |
| Minimum Cathode Current for Regulation (IMIN) | 0.4 | - | 1 | mA |
| Output Impedance | - | 0.2 | - | Ω |
Key Features
- Adjustable Output Voltage: The TL431AIP allows for an adjustable output voltage ranging from 2.495V to 36V, making it versatile for various applications.
- Precision Reference Voltage: The device offers reference voltage tolerances of 0.5% (B grade), 1% (A grade), and 2% (Standard grade) at 25°C.
- Low Output Noise and Impedance: It features low output noise and a typical output impedance of 0.2Ω, ensuring stable voltage regulation.
- Wide Operating Temperature Range: The component operates from -40°C to 125°C, making it suitable for automotive and industrial applications.
- High Sink-Current Capability: The TL431AIP can sink currents from 1 mA to 100 mA, catering to a range of load requirements.
Applications
- Rack Server Power: Used in power supply units for rack servers due to its high precision and stability.
- Industrial AC/DC and AC Inverter & VF Drives: Suitable for industrial power conversion and motor control applications.
- Servo Drive Control Modules: Employed in servo drive systems requiring precise voltage regulation.
- Notebook PC Power Adapters: Used in power adapter designs for notebook PCs due to its compact size and high performance).
Q & A
- What is the reference voltage range of the TL431AIP?
The TL431AIP has an adjustable reference voltage range from 2.495V to 36V.
- What are the available tolerance grades for the TL431AIP?
The device is available with reference voltage tolerances of 0.5% (B grade), 1% (A grade), and 2% (Standard grade) at 25°C.
- What is the operating temperature range of the TL431AIP?
The TL431AIP operates from -40°C to 125°C.
- What is the maximum cathode current the TL431AIP can handle?
The maximum continuous cathode current is 150 mA.
- What is the typical output impedance of the TL431AIP?
The typical output impedance is 0.2Ω.
- Is the TL431AIP RoHS compliant?
Yes, the TL431AIP is RoHS compliant.
- What are some common applications of the TL431AIP?
Common applications include rack server power, industrial AC/DC, AC inverter & VF drives, servo drive control modules, and notebook PC power adapters.
- What is the minimum cathode current required for regulation?
The minimum cathode current for regulation is 0.4 mA to 1 mA.
- What is the package type of the TL431AIP?
The TL431AIP is available in an 8-pin PDIP (Plastic Dual In-Line Package).
- Is the TL431AIP suitable for automotive applications?
Yes, the TL431AIP is suitable for automotive applications due to its specified thermal stability and wide operating temperature range.
