KA7912TSTU

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KA7912TSTU is a 3-terminal voltage regulator integrated circuit, developed by XY Semiconductor Co. It is categorized as PMIC - Voltage Regulators - Linear. This voltage regulator IC is capable of providing a highly stable power supply voltage for many different applications. This article will discuss the application fields and working principles of KA7912TSTU in detail.

Application Fields

KA7912TSTU is mainly used in power supplies, such as AC/DC power supply, three-phase bridge rectifier power supply, etc. It can provide a regulated voltage with an output current up to 1.5A. It also features over-current and short-circuit protection and is capable of working in a wide temperature range from -40℃ to +150℃. This voltage regulator IC is typically used in electric power inverters, switch mode power supplies, voltage stabilization and battery charge control circuits, etc.

Working Principle

The KA7912TSTU voltage regulator IC utilizes a three-terminal integrated circuit with both a positive and negative output terminal. It works by using a pulse-width-modulation (PWM) technique to regulate the output voltage and current. A reference voltage, generated by an internal voltage reference circuit, is compared against a high precision, adjustable threshold voltage. If the threshold voltage is higher than the reference voltage, the regulator IC is switched to a high-impedance “off” state and the output current is shut down to prevent over-current. When the threshold voltage is lower than the reference voltage, the regulator IC is switched to a low-impedance “on” state, the output current is enabled and the output voltage is regulated accordingly.

KA7912TSTU also contains an adjustable current limit function which prevents the output from being overloaded. The same voltage reference used for voltage regulation is also used for the current limit circuit. When the output current reaches the current limit setting, the output is shut down and the current limit indicator LED lights up. This feature protects the load and the KA7912TSTU from excessive currents.

In addition to this, the KA7912TSTU voltage regulator IC also offers over-temperature and over-voltage protection. When the IC temperature exceeds the set limit, or if the input voltage exceeds the rated voltage, the output is automatically shut down.

Conclusion

The KA7912TSTU voltage regulator IC offers reliable and accurate power supply with stable output voltage and current to a wide range of applications. It is designed to work efficiently at temperatures ranging from -40℃ to +150℃, and provides over-current, short-circuit, over-voltage and over-temperature protection. It is a perfect choice for many power supply designs and applications.

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