Overview
The TL431BCDCKR is a precision programmable voltage reference device manufactured by Texas Instruments. It is part of the TL431 series, which includes three-terminal adjustable shunt regulators known for their thermal stability across various temperature ranges. These devices are widely used in applications requiring precise voltage regulation and are excellent replacements for Zener diodes in many scenarios.
The TL431BCDCKR operates from -40°C to 125°C, making it suitable for automotive, commercial, and military applications. The device features an adjustable output voltage that can be set between approximately 2.5V and 36V using two external resistors.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage Tolerance at 25°C | 0.5% (B Grade) | % |
| Adjustable Output Voltage | Vref to 36V | V |
| Operating Temperature Range | -40°C to 125°C | °C |
| Typical Temperature Drift | 6 mV (C Temp), 14 mV (I Temp, Q Temp) | mV |
| Typical Output Impedance | 0.2 Ω | Ω |
| Sink-Current Capability | 1 mA to 100 mA | mA |
| Package | SC70 (DCK) |
Key Features
- Reference voltage tolerance at 25°C: 0.5% (B grade), 1% (A grade), and 2% (Standard grade)
- Adjustable output voltage: Vref (approximately 2.5V) to 36V with two external resistors
- Operation from -40°C to 125°C, making it suitable for various environmental conditions
- Low output noise and typical output impedance of 0.2 Ω
- Sink-current capability: 1 mA to 100 mA
- Active output circuitry providing a sharp turn-on characteristic, ideal for replacing Zener diodes
Applications
- Rack server power supplies
- Industrial AC/DC power supplies
- AC inverter and variable frequency (VF) drives
- Servo drive control modules
- Notebook PC power adapter designs
- On-board regulation and adjustable power supplies
- Switching power supplies
Q & A
- What is the TL431BCDCKR used for?
The TL431BCDCKR is used as a precision programmable voltage reference in various applications, including on-board regulation, adjustable power supplies, and switching power supplies.
- What is the operating temperature range of the TL431BCDCKR?
The TL431BCDCKR operates from -40°C to 125°C.
- How is the output voltage of the TL431BCDCKR adjusted?
The output voltage can be adjusted between approximately 2.5V and 36V using two external resistors.
- What are the reference voltage tolerances for the TL431BCDCKR?
The reference voltage tolerances are 0.5% (B grade), 1% (A grade), and 2% (Standard grade) at 25°C.
- What is the typical output impedance of the TL431BCDCKR?
The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431BCDCKR?
The sink-current capability ranges from 1 mA to 100 mA.
- What package type is the TL431BCDCKR available in?
The TL431BCDCKR is available in the SC70 (DCK) package.
- Is the TL431BCDCKR suitable for automotive applications?
- What are some common applications of the TL431BCDCKR?
- Does the TL431BCDCKR have low output noise?
