VI-26K-CY-B1

Current - Output (Max):	1.25A
Size / Dimension:	4.60" L x 2.40" W x 1.07" H (116.8mm x 61.0mm x 27.1mm)
Package / Case:	Full Brick
Mounting Type:	Through Hole
Efficiency:	90%
Operating Temperature:	-25°C ~ 85°C
Features:	OCP, OTP, OVP, SCP
Applications:	ITE (Commercial)
Voltage - Isolation:	3kV
Power (Watts):	50W
Series:	VI-200™
Voltage - Output 3:	--
Voltage - Output 2:	--
Voltage - Output 1:	40V
Voltage - Input (Max):	400V
Voltage - Input (Min):	200V
Number of Outputs:	1
Type:	Isolated Module
Part Status:	Active
Packaging:	Bulk

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Dc to Dc converters are used in a variety of applications for converting direct current (DC) to an alternative voltage or current. The VI-26K-CY-B1 is one such converter and it is capable of providing both isolated and non-isolated output for DC to DC conversion. This converter, often referred to as a ‘DC/DC buck converter’, has a wide range of possible uses, depending on the specific target application. In general, a DC-DC buck converter is used for step-down applications where the output voltage needs to be set lower than the input voltage (for example when powering a device from a high-voltage supply line). In the case of the VI-26K-CY-B1, it is designed for long-term dependable operation and can support a wide input voltage range of 9V to 26V. It is also compatible with a variety of different load types.The VI-26K-CY-B1 operating principle is fairly straightforward. It uses an inductor and a diode to convert current from the input source into an alternating current (AC) waveform. The AC waveform is then rectified and filtered back into a DC supply but at a lower voltage than the input. This process is described in more detail below.The VI-26K-CY-B1 utilises an input voltage (Vin) to drive a buck converter switch. When this switch is ‘on’, it allows current to flow to an inductor from the input supply (Vin). This current flows uninterrupted until the switch turns ‘off’. Once the switch is turned ‘off’, the inductor collapses and the stored energy is released in the form of an AC waveform and supplied to a bridge rectifier and low-pass filter. The bridge rectifier converts the AC waveform into a DC signal with two current paths. The positive-going current flows through the diode Anode while the negative-going current flows through the diode Cathode. The filtered output voltage of this stage is determined by the forward voltage drop of the diode and other filter component efficiencies. This output is further conditioned by a low-pass filter before it is applied to the output terminals.In addition to providing DC to DC conversion, the VI-26K-CY-B1 can also provide isolation between the input and output circuits using an internal transformer. This provides a safer environment for connecting the converter and the devices it is supplying.In summary, the VI-26K-CY-B1 DC to DC converter is capable of providing a wide range of input and output voltages and is suitable for long-term, dependable operation. It uses an inductor, diode, bridge rectifier and low-pass filter to convert the current from the input supply into a lower output voltage. Furthermore, it can provide isolation between input and output circuits if required.

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