SPD48601

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AC / DC converters are devices used to convert an alternating current (AC) source voltage or current into either a direct current (DC) voltage or current. The SPD48601 is a device commonly used in AC / DC converters to convert AC signals into DC signals. In this article, we will discuss its application field and working principle in detail.

SPD48601 Application Field

The SPD48601 is a type of MICRO-POWER DUAL MOSFET SWITCHER, typically used in the field of AC/DC power conversion. It has two useful operations: one is to turn the signal on and off, and the other is to choose whether to use high or low voltage levels when outputting. It is an ideal device for applications where low voltage operation and long standby time are required, such as in portable electronic devices, LED lighting, unmanned aerial vehicles, medical devices, and more. With its low quiescent current, wide operating temperature range, and fast response time, the SPD48601 can be used in a variety of applications.

SPD48601 Working Principle

The SPD48601 consists of two independent MOSFET switches, each with its own gate and drain. The gate of the first switch is driven by an internal oscillator, causing it to turn on and off cyclically. This alternating switching cycle controls the output voltage of the device. The second switch is driven by the output voltage of the device, allowing it to switch between a high and a low voltage level. When the first switch is ON, the voltage at its drain is high and the voltage at its gate is low, allowing the second switch to open. This results in a high output voltage. Conversely, when the first switch is OFF, the voltage at its drain is low and the voltage at its gate is high, causing the second switch to close, resulting in a low output voltage. The output voltage level is determined by the oscillator frequency and the duty cycle of the first switch; that is, the ratio of the on-time to the total cycle time. The oscillator frequency can be set using an auxiliary resistor and capacitor. Additionally, the Vreg pin can be used to set the output voltage, allowing for precise control of the output voltage.

Conclusion

In summary, the SPD48601 is a type of MICRO-POWER DUAL MOSFET SWITCHER suitable for AC/DC power conversion applications. It has two independent MOSFET switches which are controlled by an internal oscillator, allowing us to output high and low voltage levels. By setting the oscillator frequency and the Vreg pin, we can precisely control the output voltage.

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