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MPQ2908AGF Application Field and Working Principle

MPQ2908AGF is a dual-channel, 3A, 28V step-down synchronous switching controller. It is designed to achieve a compact, lightweight and low-noise power solution. It is a member of the DC-DC switching controller family.

Application Field

The applications of MPQ2908AGF are mainly concentrated in the fields of automotive, consumer and industrial. The major application areas of MPQ2908AGF include power supply design for TVs, monitors, laptops, DSCs, 3D printer, intelligent toys, home appliances, radio communication equipment, audio equipment, and PC motherboards.

Working Principle

MPQ2908AGF uses the fixed frequency and constant on-time control strategy to adjust the output voltage. It has internal over-current protection, thermal shutdown circuit, and output voltage feedback loop. The two channels of it will be completely independent or synchronized during the operation.

It mainly achieves the output voltage regulation by adjusting the duty cycle of the MOSFET. At the same time, it can set the OVP threshold and the current limitation of each channel. The supply voltage range is 4.5V-28V. Its switching frequency is 300KHZ to 2.2MHz and can be adjusted by an external resistor.

In addition, it has a feature called "Soft Start" which enables it to start smoothly. The operating temperature of this device is -40℃ ~125℃.

Conclusion

MPQ2908AGF is a powerful dual-channel, 3A, 28V step-down synchronous switching controller. It has a wide range of application fields, including power supplies for TVs, DSCs, 3D printer and other consumer electronics. It works by adjusting the duty cycle of MOSFET to regulate the output voltage. It has an internal OCP, OVP and thermal shutdown circuit. It also has a feature called "Soft Start" for smooth start-up.

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