Overview
The TL431CPWG4 is a three-terminal adjustable shunt regulator produced by Texas Instruments. This device is part of the TL431 series, known for its high precision and thermal stability across various temperature ranges. The TL431CPWG4 is designed to operate in automotive, commercial, and military environments, ensuring reliable performance in diverse applications.
The device allows for adjustable output voltage settings between approximately 2.5V and 36V using two external resistors, making it versatile for various voltage regulation needs. It features active output circuitry that provides a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
Key Specifications
| Characteristic | Value | Unit |
|---|---|---|
| Reference Voltage Tolerance at 25°C | 0.5% (B grade), 1% (A grade), 2% (Standard 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 Type | TSSOP (PW) |
Key Features
- Programmable reference voltage that can be set between approximately 2.5V and 36V using two external resistors.
- High thermal stability over a wide temperature range (−40°C to 125°C).
- Low output noise and typical output impedance of 0.2 Ω.
- Sink-current capability ranging from 1 mA to 100 mA.
- Active output circuitry providing a sharp turn-on characteristic, suitable for replacing Zener diodes in many applications.
- Available in different grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
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 voltage regulation.
- Adjustable power supplies.
- Switching power supplies.
Q & A
- What is the TL431CPWG4?
The TL431CPWG4 is a three-terminal adjustable shunt regulator produced by Texas Instruments.
- What is the adjustable output voltage range of the TL431CPWG4?
The output voltage can be set to any value between approximately 2.5V and 36V using two external resistors.
- What are the operating temperature ranges for the TL431CPWG4?
The device operates from −40°C to 125°C.
- What are the typical temperature drift values for the TL431CPWG4?
The typical temperature drift values are 6 mV (C temp) and 14 mV (I temp, Q temp).
- What is the typical output impedance of the TL431CPWG4?
The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431CPWG4?
The sink-current capability ranges from 1 mA to 100 mA.
- In what package type is the TL431CPWG4 available?
The TL431CPWG4 is available in a TSSOP (PW) package.
- What are some common applications of the TL431CPWG4?
Common applications include rack server power supplies, industrial AC/DC power supplies, AC inverter and VF drives, servo drive control modules, and notebook PC power adapter designs.
- Can the TL431CPWG4 replace Zener diodes in some applications?
Yes, the TL431CPWG4 can replace Zener diodes in many applications due to its active output circuitry and sharp turn-on characteristic.
- What are the different grades of the TL431CPWG4 based on initial tolerance?
The device is available in different grades with initial tolerances of 0.5% (B grade), 1% (A grade), and 2% (Standard grade) at 25°C.
