Current - Output (Max):	4A
Supplier Device Package:	--
Size / Dimension:	1.52" L x 1.07" W x 0.20" H (38.7mm x 27.2mm x 5.0mm)
Mounting Type:	Surface Mount
Efficiency:	90%
Operating Temperature:	-40°C ~ 85°C (With Derating)
Features:	--
Applications:	ITE (Commercial)
Voltage - Isolation:	1.5kV
Power (Watts):	20W
Series:	SFS
Voltage - Output 4:	--
Voltage - Output 3:	--
Voltage - Output 2:	--
Voltage - Output 1:	5V
Voltage - Input (Max):	76V
Voltage - Input (Min):	36V
Number of Outputs:	1
Type:	Isolated Module
Part Status:	Active

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SFS204805B: DC DC Converters

The SFS204805B is a type of DC-DC converter used to convert DC electricity from one voltage level to another. It is designed to provide a regulated output voltage in the range of 1.2V to 5V and is commonly used in telecommunications, industrial automation, and automotive applications.

Overview

The SFS204805B converter is a two-phase, four-channel, integrated step-down DC-DC converter with an input voltage range of 7V to 25V. It has maximum output current ratings of 2A per channel and total power ratings of 10W. The converter features full featured current and over-temperature protection as well as output current limiting and overvoltage protection. The step-down converter also includes built-in power FETs and can be used to provide efficient and accurate step-down conversion of voltages of up to 25V.

Application Field

The SFS204805B converter is suitable for a wide range of applications, including consumer electronics, industrial automation, automotive, and telecommunications. It is especially suitable for telecom applications where the load current requirement can be provided by the integrated power FETs. The step-down converter can also be used in automotive applications where it can be used to convert higher voltages from the battery to lower ones used by the on-board electronics.

Working Principle

The SFS204805B converter is a switch mode power supply (SMPS) that utilizes a pulse width modulation (PWM) control technique to provide precise step-down voltage conversion from an input voltage to an output voltage. The control circuit utilizes an embedded digital signal processor (DSP) to generate and modulate the PWM signal that regulates the output current.The converter works by switching a MOSFET ON and OFF at a predetermined frequency. When the MOSFET is turned on, current is allowed to flow through it and an inductor connected to the MOSFET. As current flows through the inductor, magnetic field is created and stored in the inductor. When the MOSFET is turned off, the stored magnetic field collapses and produces a voltage across the inductor which is then rectified and converted to the output voltage.

Conclusion

The SFS204805B is a DC-DC converter used to convert DC electricity from one voltage level to another. It is designed to provide a regulated output voltage and is suitable for a wide range of applications including consumer electronics, industrial automation, automotive, and telecommunications. The step-down converter utilizes an embedded digital signal processor (DSP) and a pulse width modulation (PWM) control technique to provide precise step-down voltage conversion. It is an efficient and accurate way to convert higher input voltages to lower output voltages.

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