LM2576D2T-3.3G

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

PMIC(Power Management Integrated Circuits) is a type of microcircuit which combines several analog and digital devices, allowing the microelectronic product to achieve the best system level power management performance. Voltage Regulators are a type of power device used to produce a voltage different from the input. There are two common types of voltage regulators: linear and switching regulators. In current electronic products, switching regulators are more popular. LM2576D2T-3.3G is an adjustable switching regulator produced by Texas Instruments, and it is an important component for many modern electronic products.

Application fields

Due to the high efficiency and wide output voltage range, LM2576D2T-3.3G can be widely applied in DVD players, toys, game products, mobile phones, notebook computers, motorcycles, hybrid cars and other products. Moreover, LM2576D2T-3.3G has relatively high accuracy, so it also finds use in precision instrumentation and testing equipment. Especially in high performance, low power consumption products like laptops, LM2576D2T-3.3G is used to regulate the main power of the laptop, which can reduce the laptop’s power consumption when working.

Working Principle

LM2576D2T-3.3G is composed of an oscillator, error amplifier, voltage reference circuit, current sensing, driver circuit and etc.. The oscillator has a constant frequency and outputs the pulse width modulation signal for the pulse width modulation circuit to control the power switch ON and OFF. Error Amplifier is used to compare the voltage of the feedback circuit and reference voltage and output the control signal to the pulse width modulation circuit.

The voltage reference circuit is used to generate a reference voltage to compare with the feedback circuit, so that it can detect the output voltage changes. The current sensing circuit is used to detect the current flowing in the power switch and output the voltage signal, the signal enters into the desired current control circuit, to protect the power switch and reduce the power losses in the power switch.

Finally, the driver circuit is used to drive the power switch working. According to the signal from error amplifier, the driver circuit controls the opening and closing of the power switch, converts the input voltage into the required output voltage as needed. When the input voltage changes, the error amplifier circuit can adjust the pulse width of the power switch to match the appropriate output voltage.

Conclusion

In summary, LM2576D2T-3.3G is a popular adjustable switching regulator, it is widely used in all sorts of electronic products, and has many advantages. It has a wide output voltage range, high efficiency, and high accuracy. LM2576D2T-3.3G works by comparing the output voltage and reference voltage, then adjusts the pulse width of the power switch to control the output voltage.

The specific data is subject to PDF, and the above content is for reference