Overview
The TL431CDG4 is a precision programmable shunt regulator produced by Texas Instruments. This three-terminal adjustable shunt regulator is known for its high thermal stability and versatility in various applications. The TL431CDG4 is part of the TL431 family, which includes devices with different temperature ranges and package options. It is widely used in applications requiring precise voltage regulation and stability over a broad temperature range.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage Tolerance at 25°C | 0.5% (B grade), 1% (A grade), 2% (Standard grade) | % |
| Adjustable Output Voltage | Vref to 36 V | V |
| Operating Temperature Range | –40°C to 125°C (Q grade) | °C |
| Typical Temperature Drift | 6 mV (C temp), 14 mV (I temp, Q temp) | mV |
| Output Impedance | 0.2 Ω (typical) | Ω |
| Sink-Current Capability | 1 mA to 100 mA | mA |
| Package Type | 8-Pin SOIC | |
| RoHS Compliance | Yes |
Key Features
- High precision reference voltage with low output noise.
- Adjustable output voltage from Vref (approximately 2.5V) to 36V using two external resistors.
- Low output impedance of 0.2Ω (typical).
- Sink-current capability ranging from 1 mA to 100 mA.
- Excellent thermal stability over a wide temperature range.
- Sharp turn-on characteristic, making it an excellent replacement for 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 TL431CDG4?
The TL431CDG4 is a precision programmable shunt regulator produced by Texas Instruments.
- What are the reference voltage tolerances for the TL431CDG4?
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 TL431CDG4?
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 TL431CDG4?
The device operates from –40°C to 125°C (Q grade).
- What is the typical output impedance of the TL431CDG4?
The typical output impedance is 0.2Ω.
- What is the sink-current capability of the TL431CDG4?
The sink-current capability ranges from 1 mA to 100 mA.
- In what package is the TL431CDG4 available?
The TL431CDG4 is available in an 8-Pin SOIC package.
- Is the TL431CDG4 RoHS compliant?
Yes, the TL431CDG4 is RoHS compliant.
- What are some common applications of the TL431CDG4?
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 TL431CDG4 replace Zener diodes in some applications?
Yes, the TL431CDG4 can replace Zener diodes due to its sharp turn-on characteristic and low output noise.
