IRU3037CFTRPBF

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IRU3037CFTRPBF Application Field and Working Principle

IRU3037CFTRPBF is a type of the DC-DC switching controller ICs (integrated circuit), which belongs to the family of voltage regulator (PMIC). It is designed to provide high efficiency in a broad range of off-line applications.

Application Field

IRU3037CFTRPBF covers diverse applications, ranging from primary-side synchronous rectification to secondary-side synchronous rectification, low/medium power voltage applications, motor drives, and other systems requiring a wide range of power supply types. It has been widely used in industrial, audio, video, and telecom applications. Its standby current is about 4 μA, providing a low power solution. IRU3037CFTRPBF features a thermal shut down, a soft start function, and an output Over-Voltage Protection (OVP) to fully protect the system.

Working Principle

The IRU3037CFTRPBF is a dc-dc switching controller IC. It works according to the pulse width modulation (PWM) principle, with frequency and duty cycle adjusted based on voltage feedback. A voltage reference and comparator are used in PWM control. The voltage feedback loop is compared with the and compared with reference voltage. If the output voltage becomes greater than the reference voltage, the comparator output becomes high to reduce the duty cycle of the PWM waveform, and then the output voltage is decreased. The output waveform will be a rectangular wave, with the frequency continuously being fine-tuned by the adjustment of PWM duty cycle. As a result, the output voltage of the IRU3037CFTRPBF is highly accurate and stable.

IRU3037CFTRPBF provides a working principle of constant frequency, constant on-time for off-line smps supplies. Its output high-side Drive recognizes the power MOSFET turn-off in conjunction with the built-in Flyback winding. Transformer rectification allows it to automate the system energy return, improving power efficiency.

Conclusion

In conclusion, the IRU3037CFTRPBF is a type of PMIC (Voltage Regulators - DC DC Switching Controllers) which provides a wide range of power supply types, with high efficiency and low standby current. It works based on the pulse width modulation (PWM) principle, with frequency and duty cycle adjusted based on voltage feedback, making the output voltage highly accurate and stable. IRU3037CFTRPBF is widely used in industrial, audio, video, and telecom applications.

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