V375B5H200BN3

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DC-DC converters, such as the V375B5H200BN3, are used to convert or step-up the voltage of a source. Due to their small size, low power consumption, and high efficiency, they are an effective solution for automotive, medical, and other applications. This article will discuss the V375B5H200BN3’s application field and working principle.

Application Field

The V375B5H200BN3 is a three-terminal, fixed-frequency non-isolated DC/DC converter with a wide input operating voltage range of 3.6 to 5.5V. It is specially designed for a wide range of applications including entry-level server and communications equipment, consumer communications, and automotive applications. The device is capable of providing a maximum output current of 0.2A, with an output voltage range of 1.2 to 5V, and a switching frequency of 1.2MHz, allowing it to achieve high Efficiency. It is also integrated with over-current, reverse input polarity, over-temperature, and over-voltage protection, further increasing the safety of the system.

Working Principle

The V375B5H200BN3 adopts the synchronous buck converter topology, which consists of an inductor, two switches, and a diode to provide a controlled current and output voltage. The part has two external input pins, including a supply voltage (Vin) and a ground (GND) pin. It also has two output pins, a regulated voltage (Vout) and an output ground (OGND) pin.

When the circuit is powered on, the input voltage causes the upper switch (typically a N-channel MOSFET) to close and the lower switch to open. This causes the current to flow through the inductor and charging the output capacitor to a voltage that is higher than the input voltage. When the capacitor is fully charged, the upper switch is opened and the lower switch is closed, thereby preventing the inductor current from increasing further and the output voltage from dropping.

The V375B5H200BN3 features a fixed switching frequency of 1.2MHz, which allows for a wide range of output capacitors and inductors to be used. In addition, the device has an oscillator frequency control pin, allowing the user to reduce the switching frequency for certain applications. The device also uses high-frequency current-mode control with an external compensation network to improve light-load efficiency and reduce output voltage ripple.

In summary, the V375B5H200BN3 is a three-terminal, fixed-frequency non-isolated DC/DC converter with a wide input operating voltage range, high efficiency, over-current, reverse input polarity, over-temperature, and over-voltage protection, making it ideal for a wide range of applications including entry-level server and communications equipment, consumer communications, and automotive applications. It adopts the synchronous buck converter topology with a fixed switching frequency of 1.2MHz, and uses high-frequency current-mode control with an external compensation network to improve light-load efficiency and reduce output voltage ripple.

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