Home > Industry Information > TL431LIBIDBZR Chip - Introduction And Application Analysis
The TL431LIBIDBZR is an adjustable precision shunt regulator produced by Texas Instruments and belongs to the TL431 series. It features high precision, low dynamic impedance
and optimized reference current, and is widely used in various power management and voltage regulation scenarios.
Output voltage range: 2.495V to 36V.
Output current: Maximum 15mA.
Accuracy: ±0.5%.
Operating temperature range: -40℃ to +85℃.
Package type: SOT-23-3
Dynamic impedance: The typical value is 0.22Ω
Low dynamic impedance: The typical value is 0.22Ω, ensuring voltage stability when the load changes
High-precision voltage reference: The TL431LIBIDBZR is an adjustable precision shunt regulator with a reference voltage accuracy of ±0.5%, providing a stable voltage reference.
Low output noise voltage: It features low output noise and is suitable for precision power supply design
Optimized reference current: The reference current has been optimized to reduce leakage current and improve system accuracy
Wide output voltage range: The output voltage can be adjusted through an external resistor, ranging from 2.495V to 36V.
In the design of switching power supplies, TL431 is often used in feedback circuits to achieve a stable output voltage. The working principle is to detect the output voltage through the reference terminal
of the TL431. When the output voltage deviates from the set value, the TL431 transmits the feedback signal to the control circuit of the power supply through the optocoupler, thereby adjusting the duty cycle
of the PWM controller to ensure the stability of the output voltage.
The TL431 can be used as a voltage comparator. When the input voltage is higher than the reference voltage (2.5V), the cathode output of TL431 is low. When the input voltage is lower than the reference voltage,
the cathode outputs a high level. This characteristic makes it applicable in scenarios such as voltage monitoring and battery voltage protection
The TL431 can be used as a shunt voltage regulator to regulate the output voltage through an external resistor network. The formula for its output voltage is: Vout =(1+R2R1)×Vref, where Vref is the internal reference voltage (2.5V).
By choosing the appropriate resistance value, the output voltage can be set between 2.5V and 36V. This application is suitable for occasions that require high-precision voltage references, such as precise power supply design.
The TL431LIBIDBZR is a powerful adjustable precision shunt regulator featuring high precision, low dynamic impedance and optimized reference current. It is widely applied in various scenarios
such as shunt regulators, switching power supply feedback, voltage comparators, precision constant current sources, reference voltage sources and delay circuits. Its flexible circuit design and high-precision
voltage regulation capability make it a commonly used component in electronic circuit design. Whether in precision power supply design, voltage monitoring and protection, or in constant current sources and delay circuits,
the TL431LIBIDBZR performs outstandingly and meets a wide range of application requirements.
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