V28B5M75BL

Current - Output (Max):	15A
Base Part Number:	V28B5M75
Size / Dimension:	2.28" L x 2.20" W x 0.50" H (57.9mm x 55.9mm x 12.7mm)
Package / Case:	9-DIP Module
Mounting Type:	Through Hole
Efficiency:	73.3%
Operating Temperature:	-55°C ~ 100°C
Features:	OVP, UVLO
Applications:	ITE (Commercial)
Voltage - Isolation:	3kV
Power (Watts):	75W
Series:	MINI
Voltage - Output 3:	--
Voltage - Output 2:	--
Voltage - Output 1:	5V
Voltage - Input (Max):	36V
Voltage - Input (Min):	9V
Number of Outputs:	1
Type:	Isolated Module
Part Status:	Active
Packaging:	Bulk

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DC DC Converters

DC-DC converters are broad class of electronic circuits, which help to link the two DC voltages or current and output a required output voltage or current. These included devices in the form of boost converters, buck converters, flyback converters etc. In particular, this article will discuss the application field and working principle of V28B5M75BL DC-DC converter. V28B5M75BL is a high efficiency, wide input voltage buck converter, that provides very low output noise, low component count, and wide input & output range. It can provide output voltage between 0.5V and 5V for commonly used wide input voltage range of 5V to 28V.The V28B5M75BL DC-DC converter uses a synchronous rectification circuit architecture with low intrinsic MOSFET losses & high immunity from input voltage variation. The wide input voltage range helps to reduce/eliminate the addition of the external clamp components. The converter also features programmable current limit, fast transient response, which makes it ideal in various regulated output applications.The working principle of this buck converter is based on basic DC-DC converter topologies, where the voltage is stepped down from the input voltage to the desired output voltage, then regulated by the controller integrated inside the converter. In this case, the buck converter takes high DC input voltage as input and converts it into a lower DC output voltage. The input voltage is applied to the rectifier bridge that converts AC voltage to DC Voltage. The DC voltage is then fed to a high frequency transformer that raises the voltage at the primary winding side and reduces the voltage at the secondary winding side. The output voltage is determined by the turns ratio of the transformer. The output voltage is regulated by controlling the duty cycle of the switch, which is typically a MOSFET. This duty cycle is regulated by the feedback voltage from the feedback pin, which is a fraction of the output voltage. The pulse width modulation (PWM) IC along with a voltage reference, compares the feedback voltage with the reference voltage and generates a signal to control the MOSFET duty Cycle. The output voltage is regulated to be equal to the reference voltage by adjusting the duty cycle. V28B5M75BL can work with both fixed (internally programmed) and adjustable output voltage modes. Furthermore, it contains a programmable current limit circuit for protection from output overcurrent situation and a power-OK output to indicate the presence of a valid output voltage.All in all, the V28B5M75BL converter is a high efficiency, wide input voltage buck converter, with ultra-low output noise, low component count, and excellent regulation characteristics, which makes it ideal in various regulated output applications.

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