Overview
The TL431ACLPRE is a three-terminal programmable shunt regulator diode produced by Onsemi. It is part of the TL431 series, known for its adjustable precision voltage reference capabilities. This device operates as a low temperature coefficient zener diode, programmable from the reference voltage (Vref) up to 36 V using two external resistors. The TL431ACLPRE is designed to offer good temperature stability and is suitable for various applications requiring a stable voltage reference.
Key Specifications
| Characteristic | Symbol | Value | Unit |
|---|---|---|---|
| Cathode to Anode Voltage | VKA | 37 | V |
| Cathode Current Range, Continuous | IK | −100 to +150 | mA |
| Reference Input Current Range, Continuous | Iref | −0.05 to +10 | mA |
| Operating Junction Temperature | TJ | 150 | °C |
| Operating Ambient Temperature Range | TA | 0 to +70 | °C |
| Reference Input Voltage | Vref | 2.44 to 2.495 | V |
| Dynamic Impedance | |ZKA| | 0.22 to 0.5 | Ω |
| Thermal Resistance, Junction−to−Ambient | RθJA | 114 | °C/W |
| Thermal Resistance, Junction−to−Case | RθJC | 41 | °C/W |
Key Features
- Programmable output voltage from Vref to 36 V using two external resistors.
- Guaranteed 0.5% reference voltage tolerance (B grade) and 1% (A grade).
- Low dynamic output impedance, typically 0.22 Ω.
- Wide operating current range of 1.0 mA to 100 mA.
- Good temperature stability over applicable automotive, commercial, and military temperature ranges.
- Low output noise and high sink-current capability.
Applications
- Digital voltmeters and power supplies.
- Op amp circuitry and feedback control for driving optocouplers.
- Voltage monitoring, constant current source, and constant current sink.
- Series pass regulator and shunt voltage regulator.
- Rack server power, industrial AC/DC, AC inverter & VF drives, and servo drive control modules.
- Notebook PC power adapter design.
Q & A
- What is the TL431ACLPRE used for? The TL431ACLPRE is used as a programmable shunt regulator and voltage reference in various electronic circuits.
- What is the adjustable voltage range of the TL431ACLPRE? The output voltage can be adjusted from the reference voltage (Vref) up to 36 V using two external resistors.
- What is the typical dynamic impedance of the TL431ACLPRE? The typical dynamic impedance is 0.22 Ω.
- What is the operating current range of the TL431ACLPRE? The operating current range is from 1.0 mA to 100 mA.
- What are the temperature ranges for the TL431ACLPRE? The operating ambient temperature range is 0 to +70°C, and the junction temperature can go up to 150°C.
- What are some common applications of the TL431ACLPRE? Common applications include digital voltmeters, power supplies, op amp circuitry, and feedback control in power supplies.
- How does the TL431ACLPRE achieve temperature stability? It achieves good temperature stability due to its internal circuit design, which includes a multi-pole amplifier, bias circuit, compensation, and protection circuits.
- What is the reference voltage tolerance of the TL431ACLPRE? The reference voltage tolerance is typically ±0.5% for B grade and ±1% for A grade.
- Can the TL431ACLPRE be used in automotive and military applications? Yes, it is designed to operate over applicable automotive, commercial, and military temperature ranges.
- What package types are available for the TL431ACLPRE? It is available in various package types, including TO-92 (TO-226) and others, depending on the specific variant.
