S-8358B36MC-NQVT2U Integrated Circuits (ICs)

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S-8358B36MC-NQVT2U Application Field and Working Principle

The S-8358B36MC-NQVT2U is a monolithic high-efficiency DC-DC switching controller with a power supply application. It provides a continuous conduction mode (CCM) waveform to drive the external MOSFET. Its features include: adjustable switching frequency, single-power supply operation, synchronous rectification ready, active low enable, over-current protection, and low start-up current.

This switching controller is primarily used in high-efficiency step-down voltage converters, and it can also be used in other DC/DC conversion applications. It is suitable for use in a wide range of applications, such as laptop adapters, DVD players, power supplies, and automotive products.

Principle of Operation

The S-8358B36MC-NQVT2U consists of an oscillator and a control circuit that converts an input voltage to a regulated output voltage. The oscillator produces a square wave, which is then amplified by the control circuit to produce the appropriate amount of power for the output. The S-8358B36MC-NQVT2U also provides protection against over-current and under-current events, as well as a temperature shutdown feature.

The oscillator produces a high-frequency rectangular wave, which drives the external MOSFET. The control circuit compares the feedback voltage with the internal reference voltage, and adjusts the pulse width of the rectangular wave to maintain the output voltage. This process is continuous, and thus the output voltage remains stable.

When the current exceeding the preset limit is detected, the S-8358B36MC-NQVT2U will start to timeout and shut down the output. This prevents the output voltage from being pushed too high, and protects the external components from damage.

The S-8358B36MC-NQVT2U also provides a temperature shutdown feature, which is critical in some applications. This feature shuts down the output voltage if the temperature of the controller exceeds 135°C. This helps to protect the external components from damage due to high temperatures.

Advantages of S-8358B36MC-NQVT2U

The S-8358B36MC-NQVT2U provides numerous advantages for power supply applications. It features a wide input voltage range of 4.5V to 45V and can deliver up to 2A of output current. Its high efficiency makes it suitable for use in high-current applications. It also features adjustable switching frequency, over-current protection, and a low start-up current.

The S-8358B36MC-NQVT2U also has a built-in temperature shutdown feature, which is useful in applications where the external components may be prone to high temperatures. This feature helps to protect the components from damage and extends the product life. In addition, the S-8358B36MC-NQVT2U features a high level of integration, making it easy to implement.

Conclusion

The S-8358B36MC-NQVT2U is a high-efficiency DC-DC switching controller with a power supply application. Its features include adjustable switching frequency, single-power supply operation, synchronous rectification ready, active low enable, over-current protection, and low start-up current. Its high level of integration and temperature shutdown feature make it ideal for use in a wide range of applications, such as laptop adapters, DVD players, power supplies, and automotive products.

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