Overview
The TL431CPWE4 is a precision programmable reference voltage regulator produced by Texas Instruments. It belongs to the TL431 series, which are three-terminal adjustable shunt regulators known for their high accuracy and thermal stability. This component is widely used in various applications requiring a stable voltage reference.
Key Specifications
| Parameter | Unit | Min | Typ | Max |
|---|---|---|---|---|
| Reference Voltage (Vref) | V | 2.44 | 2.495 | 2.55 |
| Cathode to Anode Voltage (VKA) | V | - | - | 37 |
| Cathode Current Range (IK) | mA | -100 | - | 150 |
| Reference Input Current Range (Iref) | mA | -0.05 | - | 10 |
| Operating Junction Temperature (TJ) | °C | - | - | 150 |
| Operating Ambient Temperature Range (TA) | °C | 0 | - | 70 |
| Storage Temperature Range (Tstg) | °C | -65 | - | 150 |
| Total Power Dissipation at TA = 25°C (PD) | W | - | - | 0.70 (D, LP Suffix) |
| Thermal Resistance, Junction-to-Ambient (RJA) | °C/W | - | - | 178 (D, LP Suffix) |
Key Features
- Adjustable Output Voltage: The output voltage can be set to any value between Vref (approximately 2.5 V) and 36 V using two external resistors.
- High Accuracy: Reference voltage tolerance at 25°C is as low as 0.5% for B Grade and 1% for A Grade.
- Low Output Noise: The TL431CPWE4 has low output noise, making it suitable for applications requiring stable voltage references.
- Wide Operating Temperature Range: The component operates from 0°C to 70°C, with some versions extending to -40°C to 125°C.
- High Sink-Current Capability: The device can sink current from 1 mA to 100 mA.
- Low Dynamic Impedance: The total dynamic impedance of the circuit is relatively low, ensuring stable operation.
Applications
- Voltage Regulation: The TL431CPWE4 is commonly used in voltage regulator circuits to provide a stable reference voltage.
- Power Supplies: It is used in power supply designs to ensure stable output voltages.
- Automotive and Industrial Systems: Due to its wide operating temperature range, it is suitable for use in automotive and industrial applications.
- Consumer Electronics: The component is also used in various consumer electronics for voltage stabilization.
Q & A
- What is the reference voltage of the TL431CPWE4?
The reference voltage (Vref) of the TL431CPWE4 is approximately 2.495 V.
- What is the maximum cathode to anode voltage (VKA) for the TL431CPWE4?
The maximum cathode to anode voltage (VKA) is 37 V.
- What is the operating temperature range for the TL431CPWE4?
The operating ambient temperature range is from 0°C to 70°C, with some versions operating from -40°C to 125°C.
- How much current can the TL431CPWE4 sink?
The TL431CPWE4 can sink current from 1 mA to 100 mA.
- What is the thermal resistance, junction-to-ambient (RJA) for the TL431CPWE4?
The thermal resistance, junction-to-ambient (RJA), is 178 °C/W for the D, LP suffix package.
- Can the TL431CPWE4 be used in automotive applications?
Yes, the TL431CPWE4 can be used in automotive applications due to its wide operating temperature range and specified thermal stability.
- How is the output voltage of the TL431CPWE4 adjusted?
The output voltage can be adjusted using two external resistors.
- What is the storage temperature range for the TL431CPWE4?
The storage temperature range is from -65°C to 150°C.
- Does the TL431CPWE4 have low output noise?
Yes, the TL431CPWE4 has low output noise, making it suitable for applications requiring stable voltage references.
- What are the typical applications of the TL431CPWE4?
The TL431CPWE4 is typically used in voltage regulation, power supplies, automotive systems, and consumer electronics.
