E1205S-1WR3

## General Description

The MORNSUN E1205S-1WR3 is a compact, isolated DC-DC converter designed for low-power applications that require reliable voltage conversion and high isolation. Part of the E-series, it provides a single output with fixed voltage and integrates switching and regulation in a robust package. The module is optimized for embedded systems, industrial control, communication devices, and instrumentation equipment where space, efficiency, and isolation are critical.

## Core Features

* Device Type: Isolated DC-DC Converter
* Input Voltage: 12 V DC nominal
* Output Voltage: 5 V DC fixed output
* Output Power: 1 W maximum
* Isolation Voltage: 1.5 kVDC minimum between input and output
* Efficiency: Up to 72% typical
* Switching Frequency: 100 kHz typical
* Single Output Configuration
* SIP-3 package for compact footprint
* Wide operating temperature range for industrial applications

## Electrical Specifications

* Input Voltage Range: 10.8 V to 13.2 V DC
* Output Voltage Tolerance: ±5% typical
* Output Current: 200 mA maximum at 5 V output
* No-Load Input Current: 12 mA typical
* Line Regulation: ±1% typical
* Load Regulation: ±5% typical
* Ripple and Noise: 50 mVp-p typical at full load
* Overcurrent Protection: Continuous short-circuit protection
* Isolation Resistance: 1 GΩ minimum at 500 VDC
* Isolation Capacitance: 50 pF typical

## Timing and Dynamic Performance

* Switching Frequency: 100 kHz typical
* Transient Response: <500 µs for 25% load step
* Start-Up Time: <50 ms at nominal input voltage
* Output Voltage Rise Time: 10 ms typical
* Recovery Time: <500 µs after transient load change

## Thermal and Mechanical Specifications

* Operating Temperature Range: -40°C to +85°C
* Storage Temperature Range: -55°C to +125°C
* Derating: Linear derating above 71°C to maintain output power
* Thermal Resistance (Junction-to-Ambient): 50°C/W typical
* Package Type: SIP-3 (single inline package), through-hole compatible
* Weight: ~2 g

## Protection and Reliability Features

* Input Under-Voltage Lockout (UVLO)
* Continuous Short-Circuit Protection
* Overcurrent Limiting
* High-Isolation Voltage suitable for user-interface and safety-critical circuits
* Low leakage current across isolation barrier

## Applications

* Industrial automation and control systems
* Embedded microcontroller and sensor power supplies
* Communication equipment and signal processing devices
* Low-power instrumentation and measurement modules
* Medical devices requiring isolated low-power supplies
* Battery-powered or portable devices requiring compact isolated converters

## Performance Advantages

* Compact, lightweight design for space-constrained PCB layouts
* High isolation voltage ensures user and system safety
* Low no-load power consumption supports energy-efficient designs
* Wide operating temperature range ensures reliable performance in harsh conditions
* Integrated overcurrent and short-circuit protection improves system robustness
* Stable output with minimal ripple ensures clean power for sensitive analog and digital circuits
* High switching frequency allows smaller external components and improved transient response
* SIP-3 package enables easy mounting and efficient thermal management

The MORNSUN E1205S-1WR3 is a highly reliable, compact, isolated DC-DC converter suitable for embedded and industrial applications. Its combination of efficient voltage conversion, high isolation, low ripple, and protective features makes it an ideal solution for systems requiring safe, stable, and robust isolated power in small form-factor designs.