Overview
The TL431AIDRG4 is a precision programmable reference voltage regulator produced by Texas Instruments. This three-terminal adjustable shunt regulator is known for its high thermal stability and wide operating temperature range, making it suitable for various applications across automotive, commercial, and industrial sectors.
The device is part of the TL431 series, which offers adjustable output voltage from the reference voltage (approximately 2.5 V) up to 36 V, using two external resistors. It is particularly useful in replacing Zener diodes in many applications due to its sharp turn-on characteristic and low output noise.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Reference Voltage (Vref) | 2440 | 2495 | 2550 | mV |
| Reference Voltage Tolerance at 25°C | - | - | - | 0.5% (B Grade), 1% (A Grade), 2% (Standard Grade) |
| Adjustable Output Voltage | Vref | - | 36 | V |
| Operating Temperature Range | -40 | - | 125 | °C |
| Typical Temperature Drift | - | 6 mV (C Temp), 14 mV (I Temp, Q Temp) | - | mV |
| Output Impedance | 0.2 | 0.5 | - | Ω |
| Sink-Current Capability | 1 mA | - | 100 mA | mA |
Key Features
- Adjustable output voltage from Vref (approximately 2.5 V) to 36 V 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 from 1 mA to 100 mA.
- Sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
- Available in various grades (B, A, Standard) with different reference voltage tolerances.
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.
- Onboard regulation and adjustable power supplies.
- Switching power supplies.
Q & A
- What is the TL431AIDRG4?
The TL431AIDRG4 is a precision programmable reference voltage regulator produced by Texas Instruments.
- What is the adjustable output voltage range of the TL431AIDRG4?
The output voltage can be adjusted from the reference voltage (approximately 2.5 V) up to 36 V using two external resistors.
- What are the operating temperature ranges for the TL431AIDRG4?
The device operates from -40°C to 125°C.
- What is the typical output impedance of the TL431AIDRG4?
The typical output impedance is 0.2 Ω.
- What are the sink-current capabilities of the TL431AIDRG4?
The device can sink current from 1 mA to 100 mA.
- What are some common applications of the TL431AIDRG4?
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.
- Why is the TL431AIDRG4 often used as a replacement for Zener diodes?
It is often used as a replacement due to its sharp turn-on characteristic and low output noise.
- What are the different grades available for the TL431 series?
The TL431 series is available in B, A, and Standard grades with different reference voltage tolerances.
- Is the TL431AIDRG4 still in production?
No, the TL431AIDRG4 is obsolete and new designs should consider an alternate product.
- Where can I find detailed specifications and documentation for the TL431AIDRG4?
Detailed specifications and documentation can be found on the Texas Instruments website and through datasheets available from various electronics suppliers.
