ZTW1R52412

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DC DC Converters

A DC-DC converter is an electrical device capable of changing the voltage of a direct current input signal by way of a switched mode power supply (SMPS). It is a type of electronic circuit, usually integrated into an electronics package, that can receive an input voltage, increase or decrease the magnitude of the voltage to the desired level, depending on the design, and output the modified voltage. DC-DC converters have a number of different applications, and are commonly used in consumer electronics, industrial applications and telecommunication networks.

ZTW1R52412 Application Field

The ZTW1R52412 DC-DC converter is designed for cost-sensitive applications where space is at a premium. As an isolated, step-down converter, it provides regulated output voltage from an input voltage of up to 40V. With internal current limit and thermal shutdown, the ZTW1R52412 is a reliable choice for a wide variety of applications including: IT equipment (servers, etc.), Industrial control components, Automotive electronics, Telecommunications, Portable electronics, and Medical equipment.

ZTW1R52412 Working Principle

The ZTW1R52412 DC-DC converter utilizes a revolutionary switching technique to transform a wide input voltage range into a regulated output voltage. The device is a synchronous, non-isolated, step-down converter that operates with a buck topology. The ZTW1R52412 utilizes a high frequency oscillator, an inductor, a capacitor, and internal MOSFETs to create its output voltage. The oscillator operates at a fixed frequency of 1.25MHz using a sawtooth waveform to drive the synchronous MOSFET switch.

The buck converter has two parts: an input voltage (Vin) and an output voltage (Vout). When the input voltage is greater than the output voltage, the SWMOSFET switch is closed, a current will flow through the inductor, and the inductor will store energy. When the switch is opened, the stored energy is then released, creating a voltage drop on the inductor. The difference between the input voltage and the output voltage is the efficiency of the DC-DC converter. By ensuring that the voltage drop across the switch is small, switching losses are minimized.

To control the output voltage accurately, the ZTW1R52412 is equipped with a voltage control loop, which compares between the feedback voltage and the internal voltage reference source. If the voltage is higher than the reference, the current will be limited to reduce the voltage. On the contrary, if the voltage is lower than the reference, the current will be increased to reach to the reference voltage. This ensures that the output voltage is accurately controlled and maintained under varying input voltage conditions.

The ZTW1R52412 is an efficient and reliable DC-DC converter with a wide input voltage range and a low input ripple current. With the addition of internal over-current and over-temperature protection, the ZTW1R52412 can be used in typical commercial, automotive, and industrial application cases.

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