Overview
The TL431CLPE3 is a three-terminal adjustable shunt regulator produced by Texas Instruments. It is part of the TL431 series, known for its high precision and thermal stability. This device is designed to operate over a wide temperature range, making it suitable for various applications including automotive, commercial, and military environments. The TL431CLPE3 offers adjustable output voltage, low output noise, and a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many circuits.
Key Specifications
| Characteristic | Unit | Min | Typ | Max |
|---|---|---|---|---|
| Reference Voltage Tolerance at 25°C | % | 0.5 (B Grade), 1 (A Grade), 2 (Standard Grade) | ||
| Adjustable Output Voltage | V | Vref (approx. 2.5V) | 36 | |
| Operating Temperature Range | °C | -40 | 125 | |
| Typical Temperature Drift | mV | 6 (C Temp), 14 (I Temp, Q Temp) | ||
| Output Impedance | Ω | 0.2 | ||
| Sink-Current Capability | mA | 1 | 100 | |
| Cathode to Anode Voltage | V | 37 | ||
| Operating Junction Temperature | °C | 150 |
Key Features
- High precision reference voltage with tolerances of 0.5%, 1%, and 2% at 25°C for B, A, and standard grades, respectively.
- Adjustable output voltage from Vref (approximately 2.5V) to 36V using two external resistors.
- Operation over a wide temperature range: -40°C to 125°C for Q grade, -40°C to 85°C for I grade, and 0°C to 70°C for C grade.
- Low output noise and typical output impedance of 0.2Ω.
- Sink-current capability from 1mA to 100mA.
- Active output circuitry providing a sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
Applications
- On-board regulation and voltage monitoring.
- Adjustable power supplies and switching power supplies.
- Secondary side regulation in flyback SMPSs.
- Zener diode replacement in various circuits.
- Rack server power, industrial AC/DC, AC inverter & VF drives, and servo drive control modules.
- Notebook PC power adapter designs.
Q & A
- What is the TL431CLPE3?
The TL431CLPE3 is a three-terminal adjustable shunt regulator produced by Texas Instruments.
- What are the reference voltage tolerances for the TL431CLPE3?
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 TL431CLPE3?
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 TL431CLPE3?
The device operates from -40°C to 125°C for Q grade, -40°C to 85°C for I grade, and 0°C to 70°C for C grade.
- What is the typical output impedance of the TL431CLPE3?
The typical output impedance is 0.2Ω.
- What is the sink-current capability of the TL431CLPE3?
The sink-current capability ranges from 1mA to 100mA.
- Can the TL431CLPE3 replace Zener diodes in circuits?
- What are some common applications of the TL431CLPE3?
- What is the maximum cathode to anode voltage for the TL431CLPE3?
The maximum cathode to anode voltage is 37V.
- What is the maximum operating junction temperature for the TL431CLPE3?
The maximum operating junction temperature is 150°C.
