V28C3V3T50BG3

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DC-DC converters are power converters that convert Direct Current (DC) from one voltage level to another in order to optimize a system’s performance. A V28C3V3T50BG3 DC-DC converter is a type of DC-DC converter. It is a high frequency, limited output, and voltage-to-current converter.

Application Field of V28C3V3T50BG3

The V28C3V3T50BG3 is ideal for general purpose power conversion applications, such as mobile phones, tablets, and other hand-held electronic devices. It has also been used as a voltage regulator to power different peripheral interface controllers (PICs). The converter offers high performance, circuit protection features, advanced design topology and an internal lightning protection feature, making it an attractive choice for high peak power surge applications.

Working Principle of V28C3V3T50BG3

The V28C3V3T50BG3 utilizes a low voltage to high voltage step-up topology to convert a 3.3V DC input to a 50V DC output. It contains an internal high frequency oscillator, two voltage comparators, two voltage references, four high voltage/current FETs, four FREFLOPs, and a few other control components to form the internal circuitry.

The FETs pass voltage to the output only when the oscillator output voltage reaches a certain peak voltage at the positive or negative terminals of the second voltage comparator. When the gate voltage of the second FET exceeds the second voltage comparator voltage, it will trigger the overflow flip-flop to put the circuit in an active state.

When the circuit is in active state, it starts operating in “buck” mode and no current is supplied to the output. When the voltage is at the peak, the circuit will switch from the “buck” mode to the “boost” mode. In the “boost” mode, the output voltage will start to climb and current will start to flow. Depending on the voltage of the input from the VIN terminal, the switching frequency can vary. As voltage decreases, the switching frequency increases. When the output is steady, the switching frequency is about 200KHz.

The internal dual user adjustable current limit features help protect both the V28C3V3T50BG3 converter and its load from damage due to excessive current. It also prevents over-current condition which can cause overheating, battery drain, and overvoltage. Additionally, the internal lightning transient protection feature can protect the circuit from voltage spikes caused by close by lightning strikes.

The V28C3V3T50BG3 DC-DC converter is a versatile and efficient converter used in high-frequency, limited output, and voltage-to-current applications. With the right application, it can provide excellent performance, circuit protection, and lightning protection.

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