BD9G101G-TR Integrated Circuits (ICs)

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The BD9G101G-TR is a DC DC switching regulator, specifically designed for power management applications. It features an adjustable voltage output, wide input voltage range, low quiescent current, fast transient response, and low EMI. It is suitable for a wide range of applications, such as communications, computers, consumer electronics, medical instruments, and industrial control systems. In this article, we will discuss the application field and working principle of the BD9G101G-TR.

Application Field of BD9G101G-TR

The BD9G101G-TR can be used in a variety of applications, such as communications systems, computers, consumer electronics, medical instruments, industrial control systems, etc. It is suitable for DC-DC regulated voltage or current applications such as 3.3V, 5V, 12V, and 24V. It can provide stable output power with fine tunable accuracy and fast transient response. Furthermore, it supports input power up to 30V and output current up to 10A.

The BD9G101G-TR has built-in features that make it suitable for various power management applications. It has over-voltage protection, under-voltage protection, short-circuit protection, thermal shutdown protection, and over-load protection. It also has an adjustable soft-start feature to limit inrush current and a power-good output signal. These features make the BD9G101G-TR an ideal choice for applications that require robust power supply protection.

Working Principle of BD9G101G-TR

The BD9G101G-TR is a DC-DC buck-boost switching regulator, which means it can step down or step up the input voltage according to the output voltage requirement. It works in two stages. In the first stage, the current mode PWM controller obtains a feedback voltage proportional to the output voltage and compares it with the reference voltage. This difference is used to adjust the duty cycle of the power switches.

In the second stage, the two power switches connected in a synchronous rectifier structure convert the alternating current into direct current. The two power switches alternately conduct for a certain time ratio and the useful current flows through the output terminal. With proper switching control, the output voltage of the regulator can be adjusted to any desired level.

The BD9G101G-TR includes an automatic current limit protection circuit that prevents over-current situations. This circuit continuously monitors the output current of the regulator and switches off the power switches when the current exceeds a preset limit. This circuit is able to react faster than the conventional current sensing circuits and offers better protection against short-circuits and over-current conditions.

The BD9G101G-TR also has an output voltage soft-start function. This function allows the output voltage to slowly ramp up, which helps reduce the inrush current when the regulator is turned on. The soft-start time can be simply adjusted with an external capacitor.

Conclusion

The BD9G101G-TR is a high-efficiency DC-DC buck-boost switching regulator. It offers excellent performance in a wide range of applications, such as communications, computers, consumer electronics, medical instruments, and industrial control systems. With adjustable voltage output, wide input voltage range, low quiescent current, fast transient response and low EMI, it is an ideal choice for power management applications. The built-in features, such as over-voltage protection, under-voltage protection, short-circuit protection, thermal shutdown protection, power-good output signal, and adjustable soft-start feature make it a reliable, safe and easy to use power supply.

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