FS05-12

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DC-DC converters are used to convert an input direct current (DC) voltage to a specific output voltage. FS05-12 is one such converter designed to make the conversion from 12V inputs to a 5V output. It uses a forward-converter switching topology with primary side regulation to obtain low cost and high efficiency performance.

The FS05-12 converter features a standard pin-out and a compact package size. It has the following technical specifications: input voltage (Vin) of 7.35V to 16V; output voltage (Vout) of 4.9V to 5.5V; efficiency of up to 91.5 percent (typical) and no-load input current of less than 25 μA. It can operate over a wide temperature range of -40 ℃ to 85℃ and provides output over-voltage protection, over-current protection as well as short-circuit protection.

The FS05-12 works on the principle of the buck converter circuit. The buck converter is a theory of switching DC-DC converters that works on the capacitors retentivity. To understand the buck converter, it is necessary to first consider the steps of converting the incoming DC voltage. Firstly the AC side is filtered using a capacitor to decrease the current ripple. Secondly an inductor is used to store the energy coming from the DC voltage. Then, an MOSFET is used to switch the inductor between the input and the output depending on the operating voltage. Lastly, an output capacitor is used to filter the converted voltage.

The FS05-12 converter employs synchronous rectification technology to increase efficiency. This means that the MOSFETs used to switch the inductor between the input and output form both the high side and low side of the circuit. This provides low switching losses because the MOSFETs do not need to handle any reverse current. Additionally, the use of synchronous rectification results in higher power conversion efficiency during the majority of the operating range.

The FS05-12 uses a forward-converter topology which reduces the component count significantly compared to a standard flyback converter. The forward-converter topology also simplifies the design, as the more complex feedback loop in a flyback converter is not required. Furthermore, the FS05-12 can be operated from a single voltage source and eliminates the need for an additional power supply. This reduces the complexity of the power supply circuit and allows the use of cost-effective semiconductors.

The FS05-12 is ideal for a wide range of applications that require a reliable voltage source. Applications include: server, telecom and networking equipment; set-top-boxes (STBs) and digital TVs; USB applications; and, test and measurement equipment. These converters are particularly suitable for applications in which tight voltage regulation is necessary, as they are able to maintain an accurate output voltage over a wide range of input and load conditions.

In summary, the FS05-12 is a high efficiency DC-DC converter designed to convert an input direct current voltage to a specific output voltage. It is able to maintain an accurate output voltage over a wide range of input and load conditions and employs a synchronous rectification technology to significantly increase efficiency. The small form factor and low cost of the converter make it ideal for a wide range of applications, such as server, telecommunications and USB devices.

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