LD40-23B05R2

## General Description

The MORNSUN LD40-23B05R2 is a compact, high-reliability isolated DC-DC converter designed for industrial, instrumentation, and communication applications. It provides a regulated 5 V output from a 23 V nominal input while ensuring electrical isolation between input and output. This module is optimized for low ripple, high efficiency, and robust protection, suitable for embedded systems and applications requiring safe and stable power conversion. The LD40 series emphasizes compact size, high power density, and industrial-grade performance.

## Core Features

* Input Voltage: 23 VDC nominal
* Output Voltage: 5 VDC
* Output Current: 8 A typical, 40 W output power
* High efficiency: up to 90% typical
* Isolation voltage: 3 kVDC between input and output
* Switching frequency: 100 kHz typical
* Over-current protection and short-circuit protection
* Input under-voltage lockout (UVLO) and over-voltage protection
* Wide operating temperature range: -40°C to +85°C
* Remote On/Off control for power management
* Low ripple and noise output
* SIP or open-frame package for high-density PCB integration
* RoHS compliant, lead-free

## Electrical Specifications

* Input Voltage Range: 18 VDC to 36 VDC
* Output Voltage: 5 V ±1%
* Output Current: 8 A maximum
* Output Power: 40 W
* Efficiency: 90% typical at full load
* Ripple and Noise (20 MHz bandwidth): 50 mVp-p typical
* Isolation Voltage: 3 kVDC
* Isolation Resistance: ≥1 GΩ at 500 VDC
* Switching Frequency: 100 kHz typical
* Line Regulation: ±0.5% typical
* Load Regulation: ±1% typical
* Short-Circuit Protection: Continuous with automatic recovery
* Over-Voltage Protection: 6.5 V typical
* Temperature Coefficient: ±0.02%/°C

## Mechanical and Thermal Specifications

* Package Type: Open-frame or SIP-style module
* Dimensions: 50.8 × 22.8 × 10.0 mm
* Weight: 28 g typical
* Pin Pitch: 2.54 mm
* Operating Temperature Range: -40°C to +85°C
* Storage Temperature Range: -55°C to +125°C
* Thermal Shutdown: Integrated protection to prevent overheating
* Cooling: Convection or forced-air depending on load conditions

## Functional Features

* Electrical Isolation: Provides galvanic separation between input and output, ensuring safety and protecting sensitive electronics
* Remote On/Off: External control of power output without physically disconnecting the input
* Over-Voltage and Under-Voltage Protection: Prevents damage to connected devices from abnormal input conditions
* Short-Circuit Protection: Ensures automatic recovery, enhancing reliability
* Low Ripple and Noise: Suitable for precision industrial and communication circuits
* Compact High-Density Package: Allows integration into space-constrained PCB layouts
* Industrial-Grade Reliability: Suitable for harsh environments with wide temperature range and robust design

## Applications

* Industrial automation systems and controllers
* Communication equipment requiring isolated 5 V power
* Instrumentation and measurement devices
* Distributed power systems in control and monitoring equipment
* Embedded systems with compact PCB designs
* Low-power signal processing modules requiring stable isolated power

## Performance Advantages

* High efficiency minimizes thermal stress and improves overall energy savings
* High isolation voltage ensures safety in industrial and commercial applications
* Continuous short-circuit protection improves system reliability and reduces maintenance
* Wide input voltage range allows operation in fluctuating power environments
* Low ripple and noise deliver clean power for sensitive analog and digital circuitry
* Compact and lightweight design facilitates integration into space-constrained designs
* Remote On/Off adds flexibility for power management and system control

The MORNSUN LD40-23B05R2 is a robust, high-efficiency, isolated DC-DC converter delivering 5 V output from a 23 V input, optimized for industrial and embedded applications where reliable, clean, and isolated power is required. Its compact size, wide input range, and comprehensive protection features make it suitable for a variety of industrial, instrumentation, and communication systems.