Load Sharing Controller for Redundant Power Supplies

Product Specifications

Technical details and manufacturing context for Load Sharing Controller

Definition

A load sharing controller is a critical component within redundant power supply systems that monitors and regulates the electrical load distribution between two or more parallel-connected power supplies. It ensures balanced current sharing to prevent overloading of individual units, optimizes system efficiency, and maintains stable output voltage during operation and during transitions between power sources. The controller continuously monitors the output current of each connected power supply unit. Using feedback signals, it adjusts the internal reference voltages or control signals of each unit to force them to share the total load current proportionally. This is typically achieved through active current balancing algorithms, often using a master-slave configuration or a democratic current sharing bus. The device is designed for industrial applications, with an input voltage range of 9–36 V DC, supporting 12/24 V systems. It offers up to 10 A continuous output current per channel, with 2 to 4 channels configurable for redundant setups. Load sharing accuracy is typically within ±5% between channels. The operating temperature range is -40 to 85 °C, and storage temperature range is -55 to 125 °C. The ingress protection rating is IP54–IP65 per IEC 60529, depending on the enclosure. Isolation voltage between input and output is 1500 V DC. Dimensions are 105 x 75 x 30 mm (W x H x D) for DIN rail mounting, and weight varies from 0.2 to 0.5 kg depending on options. Communication interfaces include CAN and RS-485 for monitoring and control. The product is intended for CE and RoHS compliance for the EU market, but actual certification must be verified with the manufacturer. Always confirm model-specific values and standards with the legal manufacturer or supplier before procurement.

Working Principle

The controller continuously monitors the output current of each connected power supply unit. Using feedback signals, it adjusts the internal reference voltages or control signals of each unit to force them to share the total load current proportionally. This is typically achieved through active current balancing algorithms, often using a master-slave configuration or a democratic current sharing bus.

Common Materials

Printed Circuit Board (PCB), Semiconductor components (ICs, transistors), Copper conductors, Plastic housing

Technical Parameters

Parameter	Typical range	Notes & selection driver
Input Voltage Range	9–36 V DC	Wide range for 12/24 V systems
Output Current per Channel	0–10 A	Max continuous per channel
Number of Channels	2–4	Configurable for redundant setups
Load Sharing Accuracy	±5 %	Typical deviation between channels
Operating Temperature Range	-40–85 °C	Industrial grade
Storage Temperature Range	-55–125 °C	Non-operating
Ingress Protection Rating	IP54–IP65	Depends on enclosureIEC 60529
Isolation Voltage	1500 V DC	Input to output
Dimensions (W x H x D)	105 x 75 x 30 mm	DIN rail mount
Weight	0.2–0.5 kg	Varies with options
Communication Interface	CAN, RS-485	For monitoring and control
Certification	CE, RoHS	Compliant for EU market

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Current Sensing Circuit
Measures output current from each power supply unit

Material: PCB with shunt resistors or current transformers
Control Logic Unit
Processes current data and generates control signals

Material: Microcontroller or dedicated IC
Signal Conditioning Circuit
Filters and amplifies sensor signals for processing

Material: PCB with operational amplifiers and passive components
Current Sharing Bus Optional
The wire that ties all units together so each can see the others' current, on democratic-sharing schemes.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Redundant Power Supply

View system integration details

Manufacturers of Load Sharing Controller

Manufacturer profiles associated with Load Sharing Controller.

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Frequently Asked Questions

What is the purpose of a load sharing controller?

It ensures that multiple parallel-connected power supplies share the total load current proportionally, preventing overloading of any single unit and maintaining stable output voltage.

What are the typical input voltage ranges?

The input voltage range is 9–36 V DC, suitable for 12/24 V systems. Always verify the exact range for your specific model.

How many channels does it support?

It supports 2 to 4 channels, configurable for redundant setups. The number of channels must be selected based on your system requirements.

What communication interfaces are available?

It offers CAN and RS-485 interfaces for monitoring and control. Confirm compatibility with your system's communication protocol.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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voltage:	9-36 VDC
humidity:	0-95% non-condensing
temperature:	-40°C to +85°C
current per channel:	0-30A

Load Sharing Controller

Product Specifications

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Application Fit & Sizing Matrix

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