Overview
The TL431BCDCKT, produced by Texas Instruments, is a precision programmable reference voltage regulator. 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 versatile and can be used in a wide range of applications, including onboard regulation, adjustable power supplies, and switching power supplies. The TL431BCDCKT offers a high degree of accuracy and stability, making it an excellent replacement for Zener diodes in many circuits.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Reference Voltage (Vref) at 25°C | 2.47 | 2.495 | 2.52 | mV |
| Reference Voltage Tolerance at 25°C | - | - | 0.5% (B grade) | % |
| Adjustable Output Voltage | Vref (2.5V) | - | 36V | V |
| Operating Temperature Range | -40°C | - | 125°C | °C |
| Typical Temperature Drift | - | 6 mV (C temp), 14 mV (I temp, Q temp) | - | mV |
| Output Impedance | - | 0.2 Ω | - | Ω |
| Sink-Current Capability | 1 mA | - | 100 mA | mA |
| Output Noise | - | Low | - | - |
Key Features
- High accuracy reference voltage with tolerances of 0.5% (B grade), 1% (A grade), and 2% (Standard grade) at 25°C.
- Adjustable output voltage from Vref (approximately 2.5V) to 36V using two external resistors.
- Operates over a wide temperature range from -40°C to 125°C.
- Low output impedance of 0.2 Ω.
- Sink-current capability from 1 mA to 100 mA.
- Low output noise.
- Active output circuitry with a sharp turn-on characteristic, making it suitable for replacing Zener diodes.
Applications
- Rack server power supplies.
- Industrial AC/DC power supplies.
- AC inverters and variable frequency drives.
- Servo drive control modules.
- Notebook PC power adapter designs.
- Onboard regulation and adjustable power supplies.
- Switching power supplies.
Q & A
- What is the TL431BCDCKT used for? The TL431BCDCKT is used as a precision programmable reference voltage regulator in various applications such as onboard regulation, adjustable power supplies, and switching power supplies.
- What are the reference voltage tolerances for the TL431BCDCKT? The reference voltage tolerances are 0.5% (B grade), 1% (A grade), and 2% (Standard grade) at 25°C.
- What is the adjustable output voltage range of the TL431BCDCKT? The output voltage can be adjusted from Vref (approximately 2.5V) to 36V using two external resistors.
- What is the operating temperature range of the TL431BCDCKT? The device operates from -40°C to 125°C.
- What is the typical output impedance of the TL431BCDCKT? The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431BCDCKT? The sink-current capability ranges from 1 mA to 100 mA.
- Is the TL431BCDCKT suitable for high-noise environments? No, the TL431BCDCKT has low output noise, making it suitable for applications requiring stable voltage references.
- Can the TL431BCDCKT replace Zener diodes in some applications? Yes, the TL431BCDCKT can replace Zener diodes due to its sharp turn-on characteristic and high accuracy.
- What are some common applications of the TL431BCDCKT? Common applications include rack server power supplies, industrial AC/DC power supplies, AC inverters, servo drive control modules, and notebook PC power adapter designs.
- What are the different packages available for the TL431BCDCKT? The TL431BCDCKT is available in various packages such as SOT-23-3, SOT-23-5, SOIC, PDIP, SOP, and others.
