LD Series Regulated DC Power Supply – Dual Output Digital Lab Series

Product Description

The LD Series Regulated DC Power Supply Is A Dual-output Digital Laboratory Power Supply Range Designed For Applications Requiring Stable, Accurately Regulated DC Voltage And Current. With Power Configurations Ranging From 300W To 1280W, The Series Provides Multiple Voltage And Current Combinations For Laboratory Testing, Electronics Development, Servicing, Production And Other Demanding Applications.

The Series Combines phase-controlled Preregulation With Linear Post-regulation To Deliver High Stability And Close Output Regulation. Its Carefully Controlled Output Makes It Suitable For Equipment And Circuits That Require Dependable DC Power During Development, Testing And Measurement.

Multiple Output Configurations

The LD Series Offers Several Output Configurations, Allowing Users To Select A Power Supply According To Their Required Voltage And Current Range. Available Models Include Versions Providing Outputs Such As 0–32V, 0–64V And 0–128V, With Current Ratings Extending Up To 20A Depending On The Model.

The Range Includes Models Such As LD3205, LD3210, LD3220, LD6405, LD6410, LD1282 And LD1285, Providing Flexible Combinations For Different Laboratory And Electronic Testing Requirements.

High Stability And Accurate Regulation

The Power Supply Is Designed For Close Voltage And Current Regulation. Both Constant-voltage And Constant-current Operating Modes Are Supported, Helping Maintain Controlled Output Conditions When The Connected Load Changes.

The Documented Regulation Specifications Include CV ±0.01% + 2mV And CC ±0.1% + 2mA. This Level Of Regulation Makes The Series Appropriate For Precision Laboratory Work, Circuit Development And Controlled DC Power Applications.

Low Output Ripple

The LD Series Provides A Maximum Output Ripple Specification Of 1mV RMS, Helping Maintain A Clean DC Output For Sensitive Electronic Circuits And Measurement Applications. Reduced Ripple Can Be Particularly Valuable When Powering Test Setups, Instrumentation And Electronic Assemblies Where Unwanted AC Components Can Affect Measurements Or Circuit Behavior.

Remote Sensing Capability

Remote Sensing Is Provided To Compensate For Voltage Drops Between The Power Supply And The Connected Load. This Feature Helps Maintain The Required Voltage At The Load Terminals, Particularly Where Longer Output Leads Or Higher Current Operation Can Introduce Measurable Cable Losses.

Convenient Digital Monitoring

The Series Features 3-digit Seven-segment Displays For Monitoring Voltage And Current. A Three-digit Digital Panel Meter Provides A Straightforward Way To Observe Operating Values During Testing And Adjustment.

Meter Accuracy Is Specified As ±3 Counts, While Front-panel Controls Allow Users To Set Voltage And Current Conveniently.

Coarse And Fine Output Adjustment

Front-panel Potentiometers Provide Separate Voltage And Current Adjustment, With coarse And Fine Controls Available For Precise Setting. The Single-turn Potentiometer Arrangement Makes It Easy To Establish The Desired Operating Point For Laboratory Testing And Electronic Development.

Built-In Protection

The LD Series Incorporates Protection Functions Designed To Help Safeguard The Power Supply And Connected Equipment. Overload And Short-circuit Protection Are Provided Through A Constant-current Type Arrangement, While Overvoltage Protection Is Available As An Optional Feature.

An Input MCB Provides Convenient Input Switching And Protection.

Rack-Mountable Design

The Power Supply Has A Compact 3U-high, 19-inch Rack-adaptable Design, Making It Suitable For Laboratory Benches As Well As Equipment Racks And Test Systems. The Approximate Chassis Dimensions Are 430mm × 133mm × 450mm, Excluding Legs And Accounting For The Specified Dimensional Convention In The Source Document.

Flexible Control And Monitoring Options

For Applications Requiring External System Integration, The LD Series Can Be Configured With analogue Programming And Monitoring For Voltage And Current As An Optional Feature. A 19-inch Rack-mounting Arrangement Is Also Available As An Optional Configuration.

Applications

The LD Series Can Be Used For A Wide Range Of Regulated DC Power Requirements, Including:

Electronics Laboratories
Research And Development Facilities
Circuit Testing
Product Development
Electronic Equipment Servicing
Production Test Systems
Instrumentation Testing
Educational Laboratories
Component Evaluation
Industrial DC Power Applications

Product Specifications

Product Series:

LD Series

Product Type:

Regulated DC Power Supply

Configuration:

Dual Output Digital Lab Series

Power Range:

300W to 1280W

Input Voltage:

230VAC ±10%

Input Frequency:

50Hz

Input Phase:

1 Phase

Available Models:

LD3205, LD3210, LD3220, LD6405, LD6410, LD1282, LD1285

Output Voltage Range:

0–32V / 0–64V / 0–128V, model dependent

Output Current Range:

Up to 20A, model dependent

LD3205 Output:

0–32V, 0–5A

LD3210 Output:

0–32V, 0–10A

LD3220 Output:

0–32V, 0–20A

LD6405 Output:

0–64V, 0–5A

LD6410 Output:

0–64V, 0–10A

LD1282 Output:

0–128V, 0–2.5A

LD1285 Output:

0–128V, 0–5A

CV Line Regulation:

±0.01% + 2mV

CC Line Regulation:

±0.1% + 2mA

CV Load Regulation:

±0.01% + 2mV

CC Load Regulation:

±0.1% + 2mA

Output Ripple CV:

1mV RMS maximum

Output Ripple CC:

1mV RMS maximum

Remote Sensing:

Provided

Operating Temperature:

0–50°C

Protection:

Overload / short circuit, constant-current type

Overvoltage Protection:

Optional

LED Indication:

CV / CC

Digital Meter:

3-digit DPM

Meter Display:

Voltage and current

Meter Accuracy:

±3 counts

Input On/Off:

MCB

Voltage/Current Setting:

V set & I set

Adjustment:

Single-turn potentiometers

Control:

Coarse and fine

Rack Mounting:

19-inch rack adaptable, optional

Analogue Programming:

Optional for voltage and current

Chassis Height:

Dimensions:

Approximately 430W × 133H × 450D mm

Weight:

Model dependent; approximately 20–30kg for listed configurations

Regulation Technology:

Phase-controlled preregulation with linear post-regulation

Design Features:

High current density, remote sensing and close regulation

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Frequently Asked Questions (FAQs)

The LD Series is a regulated DC power supply designed for laboratory, testing, development, servicing and industrial applications. It combines phase-controlled preregulation with linear post-regulation to provide stable and accurately controlled DC output. Depending on the model, the series supports output voltages from 0–32V to 0–128V and output currents up to 20A, with power configurations reaching 1280W.

The LD Series provides multiple voltage and current combinations to accommodate different power requirements. Available models include 0–32V outputs with 5A, 10A or 20A ratings, 0–64V outputs with 5A or 10A ratings, and 0–128V outputs with 2.5A or 5A ratings. This model diversity allows users to select a power supply according to the voltage and current requirements of their particular test or development application.

Yes. The LD Series is designed for high stability and close regulation in both constant-voltage and constant-current operation. Its specified CV regulation is ±0.01% + 2mV, while CC regulation is ±0.1% + 2mA. The low output ripple specification of 1mV RMS maximum further supports applications where a clean and consistent DC supply is important for accurate testing and sensitive electronic circuits.

The LD Series incorporates overload and short-circuit protection using a constant-current protection arrangement to help protect the power supply and connected load during abnormal operating conditions. An input MCB provides convenient input switching. Overvoltage protection is also available as an optional feature, providing an additional layer of protection for applications where voltage-sensitive equipment or components are being tested.

Yes. The LD Series is designed for both laboratory and equipment-integration environments. Its front-panel voltage and current controls, three-digit digital displays, coarse and fine adjustment and remote-sensing capability make it convenient for bench testing. The approximately 3U-high design is also adaptable to 19-inch rack installations, while optional analogue programming and monitoring can support integration into automated testing and control systems.