Current - Output (Max):	700mA, 700mA, 700mA
Supplier Device Package:	--
Size / Dimension:	3.00" L x 2.50" W x 0.41" H (76.2mm x 63.5mm x 10.5mm)
Package / Case:	19-DIP Module
Mounting Type:	Through Hole
Efficiency:	88%
Operating Temperature:	-40°C ~ 85°C
Features:	OCP, OTP, OVP, SCP, UVLO
Applications:	ITE (Commercial)
Voltage - Isolation:	2.5kV
Power (Watts):	35W
Series:	Melcher IMX35
Voltage - Output 3:	12V
Voltage - Output 2:	12V
Voltage - Output 1:	12V
Voltage - Input (Max):	121V
Voltage - Input (Min):	40V
Number of Outputs:	4
Type:	Isolated Module, Conformal Coated
Part Status:	Active
Packaging:	Bulk

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DC DC Converters: 70IMX35D12D12-8 Application Field and Working Principle

DC-DC converters is an important technology enabling various modern applications. The continuous efforts of technology development are leaping towards the evolution of electric power industry. Among the DC-DC converter types, many are built for modularized use in converters, applications, and distribution systems. One of the converters is known for power factor correction is the 70IMX35D12D12-8. This article will discuss the application field for this specific converter and its working principle.

Application Field and Usage

The 70IMX35D12D12-8 offers a controlled rectifier and current source for power factor correction (PFC). It is a multi-stage converter using a maximum of three stages to the converter output. It can be used for power levels up to 3.6 kW at a working voltage of 400V. This converter, as other DC-DC converters, has to have an appropriate output stage to handle the actual output power.This converter can mostly be found in electronic systems and modern AC-DC power supplies. Other applications include AC-DC battery chargers, power supplies, and batteries systems. It can also be used as a building block for other custom-built AC-DC topologies. In terms of usage, the 70IMX35D12D12-8 offers improved in-rush current, high power quality, high power efficiency, and excellent thermal performance.

Working Principle

The 70IMX35D12D12-8\'s functioning can be divided into two main stages. The converter starts by transforming the input voltage at a fixed on-off state, to provide a constant output voltage and with regulated current. Following, the rectifying stage provide insufficient power factor correction, and introduces a large number of harmonics into the system.At the end of the first stage, the inductor works as a filter, magnifying the order of magnitude of current as much as it is possible. This results in a high power factor approaching unity - meaning the current in phase with the voltage. The selection of suitable components for the inductor and the capacitor is essential to improve this power factor.In the second stage, the pulse-width modulation takes place; this is responsible for the regulation of the output by correcting the storage time of the current in the inductor. This is important to assure constant voltage regardless of the load. As a consequence of this regulated pulse-width modulation, the current is kept within the current range - which means no current overshoot and optimal harmonic containment.

Conclusion

The 70IMX35D12D12-8 DC-DC converter is a multi-state converter used mainly for power factor correction. It has a wide range of applications, including electronics systems, AC-DC power supplies, battery chargers, and power supplies. The working principle is based on two stages. The first one is a rectifying stage which provides insufficient power factor correction and introduces a large number of harmonics. The second stage is the pulse-width modulation, that is responsible for the regulation of the output current. In conclusion, this type of converter assures a high power factor, no current overshoot, and optimal harmonic containment.

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