Overview
The TL431BCPWR, produced by Texas Instruments, is a precision adjustable shunt regulator. This three-terminal device is part of the TL431 family, known for its thermal stability across a wide range of temperatures, making it suitable for automotive, commercial, and military applications. The TL431BCPWR offers adjustable output voltage, low output noise, and a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in various power supply and regulation applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage Tolerance at 25°C | 0.5% (B Grade) | % |
| Adjustable Output Voltage | Vref to 36 V | V |
| Operating Temperature Range | −40°C to 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 to 100 mA | mA |
| Package Type | TSSOP | - |
Key Features
- Adjustable Output Voltage: The output voltage can be set to any value between Vref (approximately 2.5 V) and 36 V using two external resistors.
- Low Output Noise: The device features low output noise, making it suitable for applications requiring stable voltage regulation.
- Sharp Turn-On Characteristic: Active output circuitry provides a very sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
- Low Output Impedance: Typical output impedance of 0.2 Ω ensures minimal voltage drop across the device.
- Sink-Current Capability: The device can sink current in the range of 1 mA to 100 mA.
Applications
- On-Board Regulation: Suitable for voltage regulation within electronic boards.
- Adjustable Power Supplies: Used in power supplies where adjustable output voltage is required.
- Switching Power Supplies: Ideal for switching power supplies due to its sharp turn-on characteristic.
- Rack Server Power: Used in rack server power systems for stable voltage regulation.
- Industrial AC/DC and AC Inverter & VF Drives: Suitable for industrial applications requiring stable voltage regulation.
- Servo Drive Control Module: Used in servo drive control modules for precise voltage regulation.
- Notebook PC Power Adapter Design: Used in power adapters for notebook PCs to ensure stable output voltage.
Q & A
- What is the TL431BCPWR?
The TL431BCPWR is a precision adjustable shunt regulator produced by Texas Instruments.
- What is the reference voltage tolerance of the TL431BCPWR at 25°C?
The reference voltage tolerance is 0.5% for the B grade.
- What is the adjustable output voltage range of the TL431BCPWR?
The output voltage can be set to any value between Vref (approximately 2.5 V) and 36 V using two external resistors.
- What is the operating temperature range of the TL431BCPWR?
The device operates from −40°C to 125°C.
- What is the typical output impedance of the TL431BCPWR?
The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431BCPWR?
The device can sink current in the range of 1 mA to 100 mA.
- What are some common applications of the TL431BCPWR?
Common applications include on-board regulation, adjustable power supplies, switching power supplies, rack server power, industrial AC/DC and AC inverter & VF drives, servo drive control modules, and notebook PC power adapter design.
- Why is the TL431BCPWR a good replacement for Zener diodes?
The TL431BCPWR is a good replacement due to its sharp turn-on characteristic and low output noise.
- What package type is the TL431BCPWR available in?
The TL431BCPWR is available in a TSSOP package.
- How does the TL431BCPWR ensure thermal stability?
The device is characterized for operation over a wide temperature range and has low temperature drift, ensuring good stability over the entire temperature range.
