High Input Voltage DC DC Converters (300V nom)

9th March 2020

High Input Voltage DC DC Converters. 150W to 750W Bricks with 180 to 425Vdc input range

Relec Electronics is pleased to announce the general availability of a range of High Input Voltage DC DC Converters (300V nom) from Cincon. Each unit operates from an input range of 180 to 425Vdc (300V nominal) and have 3000VAC reinforced insulation as standard, meeting EN62368 & EN60950 safety standards.

The converters are designed to provide DC Power solutions from 150W-750W.

Modules come in industry-standard quarter, half and full brick sizes, and are suitable for distributed power architectures, telecommunications, data centres, base stations, battery-operated equipment, electric vehicles and industrial applications.

The below table shows the common input voltage requirements for typical applications:

ApplicationInput Voltage
Hybrid Car300VDC
Battery Charge365VDC
Data Centre300 – 380VDC
Telecom380VDC
Industrial Control System240 – 400VDC
Aviation System240 – 400VDC

When designing in high voltage DC-DC Converters there are some essential points which need to be considered:

Safety & Isolation Levels

All Cincon HV brick converters feature reinforced input to output isolation, tested to 3000Vac. As well as DC input system, this makes them suitable for AC Systems with the addition of a front-end bridge rectifier.

Operational Benefits

  • Operating efficiencies of up to 91%, meaning reduced airflow, smaller heatsinks and improving system reliability.
  • Wide input voltage ranges from 180Vdc to 425Vdc (200Vdc to 425Vdc for CFB750-300S).
  • Industry standard packages.
  • Standard heatsinks from stock.
  • Proven EMC reference designs.

Simplicity of EMC Design

DC-DC Converters fall in to one of 2 distinct design types: Variable switching frequency and constant switching frequency. Cincon’s DC-DC Converters all feature a constant switching frequency design. The constant switching frequency makes designing EMC Filters much easier, eliminating the need to cover multiple frequencies. Designers can use the reference circuits in the application notes with complete confidence.

Redundancy & High Power Parallel Operation

Many DC-DC converters are not designed for parallel operation because of a) their current limit characteristics and b) the lack of active current sharing. When operating multiple dc dc converters in parallel it is essential that the modules share the output power evenly. Cincon’s Full Brick high input voltage DC-DC converters provide active current sharing as standard. Active current sharing works from full load to light load condition.

The reference circuits below look at 4 different load scenarios:

(a) Parallel Operation

(a) Parallel Operation | High Power DC DC @ Relec Electronics Ltd 2020

(b) Parallel operation with programmed and adjustable output

(b) Parallel operation with programmed and adjustable output | High Input Voltage DC DC Converters (300V nom)

(c) N+1 Redundant Connection

(c) N+1 Redundant Connection | High Input Voltage DC DC Converters (300V nom)

(d) N+1 redundant connection with programmed output and adjustable output voltage

N+1 redundant connection with programmed output and adjustable output voltage | High Input Voltage DC DC Converters (300V nom)

Comprehensive application notes are available guiding engineers on how to use Cincon products in a short time. Topics include Power derating, heatsinking, output voltage adjustment, remote sensing as well as EMC and reference PCB layouts. Relec’s technical team have over 40 years’ experience in power conversion, and are also on hand to talk you through all aspects of your design.

An example reference design is shown below for a fully EMC compliant circuit for an AC input without PFC correction using the CFB600-300S.

EMC compliant circuit for an AC input without PFC correction using the CFB600-300S | High Power DC DC @ Relec Electronics Ltd 2020

A summary of the Cincon High Voltage DC-DC Converter line is shown below…

High Input Voltage DC-DC Converters

CQB150 300S Series | High Power DC DC @ Relec Electronics Ltd 2020

CQB150-300S: 150W DC-DC Converter

Input: 180 to 425V dc
Outputs: 5V to 48V dc
Power: 150 Watt
Dims: Quarter Brick
3000V AC Reinforced Isolation

CHB300-300S05 Series | Cincon Power | High Power DC DC @ Relec Electronics Ltd 2020

CHB300-300S: 300W DC-DC Converter

Input: 180 to 425V dc
Outputs: 5V to 48V dc
Power: 300 Watt
Dims: Half Brick
3000V AC Reinforced Isolation

CFB600 300S Series | Cincon Power | High Power DC DC @ Relec Electronics Ltd 2020

CFB600-300S: 600W DC-DC Converter

Input: 180 to 425V dc
Outputs: 12V to 48V dc
Power: 600 Watt
Dims: Full Brick
3000V AC Reinforced Isolation

CFB750 300S Series | Cincon Power | High Power DC DC @ Relec Electronics Ltd 2020

CFB750-300S: 750W DC-DC Converter

Input: 200 to 425V dc
Outputs: 12V to 48V dc
Power: 750 Watt
Dims: Full Brick
3000V AC Reinforced Isolation

High Input Voltage DC-DC Chassis Mount Modules

CQB150-300SXX-CMFC Series

CQB150-300Sxx CMFC(D): 150W DC-DC Converter

Input: 180 to 425V dc
Outputs: 5V to 48V dc
Power: 150 Watt
Built-in EMC Filter
3000V AC Reinforced Isolation

CHB300-300Sxx CMFC(D) Series

CQB300-300Sxx CFMC(D): 300W DC-DC Converter

Input: 180 to 425V dc
Outputs: 5V to 48V dc
Power: 300 Watt
Built-in EMC Filter
3000V AC Reinforced Isolation

GET IN TOUCH TODAY – 01929 555700

Here at Relec Electronics, we have worked closely with our key suppliers for over 40 years. We specialise in many industries, including; automotive, industrial, transportation, instrumentation & defence. We have a team of dedicated engineers ready to support you throughout the design process. We also carry stock of all standard modules and accessories for next day delivery.

Let’s make this easy and call us today.

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