Isolated DC-DC Buck Converter
Isolated DC-DC Buck Converter
Reliable Isolated Power Conversion for High-Voltage DC Systems
The Isolated DC-DC Buck Converter is a 60 W power conversion module designed to convert high-voltage DC input into a stable, configurable low-voltage DC output. It supports an input range of 75 to 140 VDC and a configurable output range of 5 to 48 VDC, making it suitable for a wide range of industrial and electrical applications.
The converter uses a forward converter topology with closed-loop regulation for controlled output voltage. Galvanic isolation separates the input and output sides, while integrated current and thermal protection help support reliable continuous operation.
Key Features
- 75 to 140 VDC input
- 5 to 48 VDC configurable output
- 60 W rated power
- 24 VDC / 2.5 A tested configuration
- Forward converter topology
- Closed-loop regulation
- Feedback-resistor selectable output voltage
- Galvanic isolation
- 2.5 A current limiting
- Automatic thermal shutdown
- EMI-filtered input
- Low-ripple DC output
- Natural convection cooling
- Continuous-duty operation
- Potting available
High-Voltage DC to Regulated Low-Voltage DC
The converter is designed for applications where a regulated low-voltage supply needs to be derived from a higher-voltage DC bus or battery system.
With its 75 to 140 VDC input range and 5 to 48 VDC configurable output, the module can support different system architectures while providing electrical isolation between the source and load.
A typical tested configuration provides 24 VDC at 2.5 A, with a rated power of 60 W.
Protection and Thermal Management
The converter incorporates 2.5 A current limiting to help protect the output during excessive load conditions. Automatic thermal shutdown provides additional protection if operating temperature rises beyond the permitted range.
The unit uses natural convection cooling, eliminating the need for forced-air cooling where the application's thermal conditions permit.
Typical Applications
Telecom DC Backup Systems
Suitable for deriving regulated auxiliary power from 72 VDC, 96 VDC, and 110 VDC telecom backup and distribution systems.
Industrial Automation and Control
Designed for powering control electronics, instrumentation, and auxiliary circuits from industrial 72 VDC and 110 VDC systems.
Substation Protection and Control
Suitable for auxiliary power requirements in 110 VDC substation protection and control systems.
Utility and SCADA Systems
Can be used for regulated low-voltage power in 110 VDC utility monitoring, control, and SCADA equipment.
Marine Vessel Control
Suitable for marine control and electrical systems operating from 72 VDC and 110 VDC power buses.
Ship Automation and Monitoring
Designed for auxiliary power requirements in ship automation, monitoring, and control equipment.
Industrial Battery Systems
Suitable for deriving regulated power from 72 VDC, 96 VDC, and 110 VDC industrial battery systems.
DC-Powered Instrumentation
Can provide isolated regulated DC power for instrumentation and other low-voltage electronic circuits.
Emergency and Backup Control Systems
Suitable for auxiliary circuits powered from 96 VDC and 110 VDC emergency or backup systems.
Solar and Battery Energy Storage
Applicable to auxiliary electronic circuits connected to 72 to 140 VDC solar and energy-storage systems.
Electric Vehicle Auxiliary Electronics
Suitable for selected auxiliary electronic systems operating from 72 to 140 VDC DC buses.
Technical Specifications
Product Type: Isolated DC-DC Converter
Topology: Forward Converter
Input Voltage: 75 to 140 VDC
Output Voltage: 5 to 48 VDC, configurable
Tested Output: 24 VDC / 2.5 A
Rated Power: 60 W
Efficiency: Up to approximately 85%
Regulation: Closed-loop
Output Adjustment: Feedback-resistor selectable
Current Protection: 2.5 A limiting
Thermal Protection: Automatic shutdown
Isolation: Galvanic
Input Filtering: EMI filtered
Output Filtering: Low-ripple DC
Potting: Available
Cooling: Natural convection
Duty: Continuous
Typical DC Bus Applications
72 VDC: Telecom backup, marine systems, and industrial battery applications
96 VDC: Telecom backup, industrial battery systems, and emergency control systems
110 VDC: Substation control, utility and SCADA systems, industrial control panels, marine systems, and instrumentation
72 to 140 VDC: Solar and battery energy-storage auxiliary circuits and selected electric vehicle auxiliary electronics
Application Flexibility
With its wide DC input range, configurable output voltage, galvanic isolation, integrated protection features, and natural convection cooling, the Isolated DC-DC Buck Converter provides a flexible solution for powering low-voltage electronics from high-voltage DC sources.
The module is suited to applications that require isolated and regulated DC power in industrial, telecom, marine, utility, battery, and control-system environments.