Portable ultrasound diagnostic systems have become increasingly important in modern healthcare. Compared with traditional cart-based ultrasound equipment, portable systems offer greater flexibility for point-of-care diagnostics, emergency medicine, rural healthcare, and veterinary applications.
However, designing a reliable portable ultrasound device requires more than advanced imaging technology. The power supply plays a critical role in ensuring patient safety, image quality, system reliability, and regulatory compliance.
In this case study, Shenzhen Xinjukang Technology (XJK Power) Co., LTD supported a medical equipment manufacturer developing a new portable ultrasound diagnostic platform by providing a 72W medical-grade external power supply solution.
Customer Project Overview
The customer was developing a compact portable ultrasound diagnostic system designed for:
- Point-of-Care Ultrasound (POCUS)
- Emergency departments
- Community healthcare centers
- Mobile medical services
- Veterinary diagnostics
The system incorporated several power-intensive modules, including:
- High-performance image processing processor
- Ultrasound signal acquisition circuitry
- LCD display
- Data storage system
- Communication interfaces
- Battery charging subsystem
The engineering team required a medical-grade power solution capable of delivering stable power while meeting global medical safety standards.
Key project requirements included:
- IEC 60601-1 compliance
- 2 x MOPP patient protection
- Universal AC input
- Low leakage current
- Compact external adapter design
- Long-term reliability
- Support for international market certifications
Power Architecture Analysis of the Ultrasound System
Before selecting the power supply, the customer performed a detailed power budget analysis.
The estimated power consumption of the system is shown below:
| System Module | Typical Power Consumption |
|---|---|
| Main Processor | 15W |
| FPGA Signal Processing | 12W |
| Ultrasound Front-End Electronics | 18W |
| LCD Display Module | 12W |
| Storage and Communication Interfaces | 3W |
| Cooling and Peripheral Circuits | 4W |
| Total System Consumption | 64W |
Although the average operating power was approximately 64W, ultrasound systems often experience dynamic load changes during scanning, image processing, and data transmission.
Medical device designers typically reserve 10%–20% additional power margin to ensure stable operation under peak load conditions.
64W × 1.15 = 73.6W
Based on this analysis, a 72W medical power supply was identified as the most practical solution, providing sufficient operating headroom while maintaining compact size and high efficiency.
Key Power Challenges in Portable Ultrasound Equipment
Portable ultrasound systems present several unique power design challenges that differ from ordinary industrial electronics.
1. Medical Safety Compliance
Ultrasound devices operate in close proximity to patients and healthcare professionals.
The power supply must comply with medical safety standards including:
- IEC 60601-1
- 2 x MOPP protection
- Reinforced isolation requirements
Failure to meet these requirements may prevent the device from entering regulated medical markets.
2. Low Leakage Current Requirements
Patient safety is a primary consideration for all medical equipment.
Because ultrasound probes remain in direct contact with patients during examinations, the power supply must maintain extremely low leakage current levels.
Low leakage current helps reduce electrical risk and simplifies medical certification testing.
3. EMC and Image Quality Performance
Ultrasound systems contain highly sensitive analog and digital circuits.
Excessive ripple noise or electromagnetic interference from the power supply can affect:
- Signal acquisition accuracy
- Image clarity
- Diagnostic performance
- EMC compliance testing
A properly designed medical power supply contributes to stable image processing and reliable diagnostic results.
4. Continuous Operation Reliability
Portable ultrasound devices are often used for extended periods in:
- Hospitals
- Emergency departments
- Clinics
- Mobile healthcare units
The power supply must withstand continuous operation while maintaining stable output performance under varying environmental conditions.
Long-life components and thermal management become critical factors for long-term system reliability.
These requirements are strictly controlled by experienced medical power supply manufacturers.
Why the Customer Selected XJK Power’s 72W Medical Power Supply
After evaluating multiple solutions, the customer selected XJK Power’s 72W medical-grade external adapter.
Key specifications included:
| Parameter | Specification |
|---|---|
| Input Voltage | 100-240VAC |
| Output Voltage | 24VDC |
| Output Current | 3A |
| Rated Power | 72W |
| Efficiency | >89% |
| Leakage Current | <100μA |
| Safety Approval | IEC 60601-1 |
| Protection Functions | OVP, OCP, SCP |
The 24V output architecture also simplified the customer’s internal power conversion design, reducing PCB complexity and improving overall system efficiency.
Engineering Advantages Delivered by XJK Power
Stable Output Under Dynamic Load Conditions
Ultrasound imaging workloads can change rapidly during operation.
The 72W medical power supply maintains stable voltage regulation under varying load conditions, helping ensure consistent system performance.
Low Ripple and Noise Design
Low ripple output is particularly important in imaging equipment.
The medical-grade design minimizes electrical noise and reduces the possibility of interference with sensitive ultrasound signal processing circuits.
Benefits include:
- Improved signal integrity
- Better image consistency
- Enhanced EMC performance
Medical-Grade Isolation Protection
The power supply incorporates reinforced isolation and medical safety protection measures.
This supports compliance with international medical standards while enhancing patient and operator safety.
Compact External Adapter Design
By utilizing an external medical power adapter, the customer was able to:
- Reduce internal system temperature
- Improve thermal management
- Simplify enclosure design
- Increase overall system reliability
This approach is widely adopted in portable medical equipment development.
Certification and Regulatory Support
As a professional medical power supply manufacturer, we provide full certification support.
In addition to hardware performance, the customer required comprehensive certification support for global market deployment.
XJK Power provided documentation supporting:
- IEC 60601-1
- CE
- FCC
- UKCA
- RoHS
- CB Scheme
Providing certification resources early in the development process helped shorten the customer’s product approval timeline and reduced engineering workload.
Project Results
Following integration and validation testing, the portable ultrasound system successfully achieved project objectives.
Key outcomes included:
- Stable system operation during continuous testing
- Successful medical safety verification
- Improved thermal performance
- Reduced internal power design complexity
- Enhanced reliability during clinical operation
- Faster product commercialization
The final solution entered production and supported the customer’s expansion into international healthcare markets.
How to Select the Right Power Supply for Ultrasound Equipment
Selecting the proper power supply is an essential part of ultrasound system design.
Medical device engineers should consider the following factors:
Step 1: Calculate Total System Power
Determine the maximum power consumption of all major system modules.
Step 2: Reserve Sufficient Power Margin
Add at least 15% additional capacity to accommodate peak loads and future upgrades.
Step 3: Verify Medical Safety Compliance
Ensure the power supply complies with IEC 60601-1 and required patient protection standards.
Step 4: Evaluate Leakage Current Performance
Lower leakage current contributes to improved patient safety and certification success.
Step 5: Assess EMC and Noise Characteristics
Ripple and noise performance directly influence imaging quality and overall system stability.
Recommended Medical Power Solutions for Ultrasound Equipment
Below is our recommended ultrasound power supply selection guide. Different ultrasound platforms require different power levels.
| Ultrasound Equipment Type | Recommended Power Solution |
|---|---|
| Wireless Ultrasound Probe | 24W Medical Power Supply |
| Handheld Ultrasound Scanner | 36W Medical Power Supply |
| Portable Ultrasound Diagnostic System | 72W Medical Power Supply |
| Mobile Ultrasound Cart System | 120W Medical Power Supply |
| Advanced Color Doppler Ultrasound Platform | Custom Medical Power Supply |
As a professional medical power supply manufacturer, Shenzhen Xinjukang Technology (XJK Power) Co., LTD provides standard and customized medical power solutions ranging from compact low-power adapters to high-power medical-grade platforms for diagnostic, monitoring, imaging, and therapeutic medical equipment.
If you are developing a new ultrasound device or upgrading an existing medical system, our engineering team can help identify the most suitable medical power solution for your application. You may also be interested in a lower-power ultrasound application case.
