SFCS154812B

Current - Output (Max):	1.25A
Supplier Device Package:	--
Size / Dimension:	1.54" L x 1.16" W x 0.27" H (39.1mm x 29.5mm x 6.8mm)
Mounting Type:	Surface Mount
Efficiency:	89%
Operating Temperature:	-40°C ~ 85°C (With Derating)
Features:	--
Applications:	ITE (Commercial)
Voltage - Isolation:	1kV
Power (Watts):	15W
Series:	*
Voltage - Output 4:	--
Voltage - Output 3:	--
Voltage - Output 2:	--
Voltage - Output 1:	12V
Voltage - Input (Max):	76V
Voltage - Input (Min):	36V
Number of Outputs:	1
Type:	Isolated Module
Part Status:	Active

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DC DC Converters: SFCS154812B Application Field and Working Principle

Dc-dc converter is one kind of electric device, which plays an important role in many electronic systems and technologies, such as power supplies, telecommunication, etc. As its name indicates, the basic function of dc-dc converter is to convert direct current into other forms of electrical energy. Among many kinds of dc-dc converter, SFCS154812B is a product of ST Microelectronics, which is mainly used in portable applications as its low height tape and reel package design. This kind of dc-dc converter has a wide range of application fields, such as handheld computers, portable devices, communication apparatus, multimedia devices, mobile phones and many other appliances.To clarified the working principle of SFCS154812B dc-dc converter, it is necessary to firstly review the structure of this converter. Generally speaking, SFCS154812B dc-dc converter consists of three parts, including the main inductor, the secondary inductor and input and output capacitor. The main inductor is usually the largest component in the dc-dc converter, and its role is to store the energy to ensure the consistency of the output voltage. The secondary inductor helps to control the coupling current between input and output by creating magnetic fields. Moreover, input and output capacitors are configured for higher efficiency and smaller ripple voltage.When the current through the primary coil is increased, it will generate a certain magnetic field, which can induce current in the secondary coil. According to the Faraday\'s law of induction, the direction of the induced current in the secondary coil is opposite to the changing of the primary coil current. In addition, due to the opposite directions of the current in the primary and secondary coils, the direction of the flux generated by the primary coil will be opposite to the changing of the secondary coil current. As a result, a negative voltage will be produced in the secondary coil, thus providing a source of energy for the output voltage of the SFCS154812B dc-dc converter.To sum up, SFCS154812B dc-dc converter can convert the direct current to other forms of electrical energy with high efficiency and low ripple voltage. The main inductor and secondary inductor are used to store the energy and create the magnetic fields, and the input and output capacitors are used for higher efficiency and smaller ripple voltage. Due to its wide application field and reasonable price, SFCS154812B dc-dc converter has become the popular choice for many hand-held devices.

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