R0.25S12-2412

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DC-DC converters are one of the basic components of power electronic circuits and are widely used in various fields. The R0.25S12-2412 is a high-efficiency non-isolated synchronous buck regulator. It utilizes a synchronous rectification structure to maximize efficiency. It has wide input voltage range and output voltage can be adjusted from 1.5V to 24V. It has over- voltage, over-current protections, they also provide short-circuit protection with an adjustable foldback current level.

R0.25S12-2412 applications include power supply and energy storage equipment, general-purpose rectifiers, battery chargers, computer integrated circuit power supply, digital mobile equipment, LED lighting power supply, etc. These converters use the buck (step-down) transfer effect to convert higher input voltage DC to lower output voltage DC. This converter ensures good stability and high efficiency throughout the entire input voltage range.

The working principle of R0.25S12-2412 is based on a buck topology, with a MOSFET switch S1, an inductor L1 and a high-efficiency synchronous rectifier S2. The core of the circuit is a control loop for controlling the voltage at the Buck output. The control loop essentially consists of a current sensing network connected to a error amplifier, a PWM comparator, gate drivers and MOSFET S1. The current sensing network is used to convert the voltage drop across a resistor R1 to a proportional current, which is used to control the average current of the inductor.

The input power is converted into stored energy in an inductor during the switch ON period of the MOSFET. During the switch OFF period, the inductor releases this energy and generates a voltage across the capacitor to main the output voltage. The PWM comparator compares the error amplifier output in order to generate a pulse width modulation signal to the gate driver. The gate driver bridges the logic signal to the gate of the MOSFET, turning it ON or OFF accordingly. The synchronous rectifier S2 assists in efficiently transferring the power from the inductor to the output.

R0.25S12-2412 converters provide power supply solutions for various applications through its wide operating range, high efficiency, low noise, overload and short-circuit protection. It is an ideal solution for power supply applications where high efficiency and low noise are required.

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