New VMBHW Series: Compact 3.5 W DC/DC Converters for Demanding Applications
With the new VMBHW Series, Vitec Power expands its DC conversion portfolio with compact, isolated 3.5 W DC/DC converters for applications where reliable galvanic isolation is required directly on the PCB. The series is designed for regulated single and dual output configurations and offers a 4:1 wide input range for 12 V, 24 V and 48 V input systems.
The VMBHW Series is suitable for systems with increased requirements for isolation, stability and compact design. Typical applications include medical devices, telecom and datacom systems, industrial control, and distributed on-board power architectures.
High Isolation and Flexible Input Voltage Ranges
The VMBHW Series is designed for applications where an isolated output voltage is required from a distributed power system. The modules provide isolation of up to 5000 Vac and feature 8 mm clearance and creepage distance, making them suitable for designs with higher isolation requirements.
| Nominal Input | Input Voltage Range |
|---|---|
| 12 VDC | 4.5 – 18 VDC |
| 24 VDC | 9 – 36 VDC |
| 48 VDC | 18 – 75 VDC |
Output options include 5 V, 12 V, 15 V, ±12 V and ±15 V, allowing the series to be integrated into a wide range of power supply designs.
Key Technical Features
| Feature | Specification |
|---|---|
| Power rating | 3.5 W |
| Input range | 4:1 wide input range |
| Output options | Regulated single and dual output |
| Efficiency | Up to 84 % |
| Isolation | Up to 5000 Vac |
| Insulation system | Reinforced insulation |
| Operating temperature | -40 °C to +90 °C |
| Short-circuit protection | Continuous |
| Remote control | Remote ON/OFF control |
| Minimum load | No minimum load required |
| Clearance / creepage | 8 mm |
| Dimensions | 0.96″ × 0.58″ × 0.43″ |
| Weight | 7.27 g typical |
The series also includes under-voltage protection, continuous short-circuit protection and remote ON/OFF control, supporting reliable and energy-conscious system designs.
Designed for Medical, Telecom, Industrial and Power Distribution Applications
- Medical Devices
In medical electronics and diagnostic systems, reliable isolated power conversion is essential. With up to 5000 Vac isolation and reinforced insulation, the VMBHW Series is a suitable option for medical-oriented electronic designs requiring stable isolated power rails.
- Telecom & Datacom
The 4:1 wide input range supports flexible integration into distributed power systems and communication equipment, where input voltage conditions can vary across different platforms.
- Industrial Control
For industrial applications, the VMBHW Series combines compact dimensions, regulated output voltage and a wide operating temperature range from -40 °C to +90 °C. This makes the series well suited for control electronics and on-board power distribution in demanding environments.
- Power Distribution
The modules are designed for on-board power distribution where compact size, galvanic isolation and regulated output voltages are required.
Model Overview
The VMBHW Series includes models for 12 V, 24 V and 48 V nominal input systems. Available outputs include single-output versions with 5 V, 12 V and 15 V, as well as dual-output versions with ±12 V and ±15 V. Depending on the model, typical efficiency reaches up to 84 %.
| Model | Input Range | Output Voltage | Output Current | Typical Efficiency |
|---|---|---|---|---|
| VMBHW-1205S | 4.5–18 VDC | 5 V | 700 mA | 78 % |
| VMBHW-2412S | 9–36 VDC | 12 V | 292 mA | 84 % |
| VMBHW-2412D | 9–36 VDC | ±12 V | ±146 mA | 84 % |
| VMBHW-4815D | 18–75 VDC | ±15 V | ±117 mA | 81 % |
Remote ON/OFF for Efficient System Control
The integrated Remote ON/OFF function allows the converter to be controlled directly within the system design. According to the datasheet, the converter is switched on when the control input is open or high impedance. To switch the converter off, a current of 2–4 mA is applied via 1 kΩ to Pin 2.
The VMBHW Series includes models for 12 V, 24 V and 48 V nominal input systems. Available outputs include single-output versions with 5 V, 12 V and 15 V, as well as dual-output versions with ±12 V and ±15 V. Depending on the model, typical efficiency reaches up to 84 %.
This feature is useful in systems where individual power rails need to be activated or disabled as required.
EMC and Mechanical Design Support
The datasheet also provides EMC filter recommendations for meeting surge, EFT and EMI requirements. Separate configurations are shown for single and dual output designs, including recommended values for capacitors and inductors. The mechanical drawing and recommended footprint details support fast PCB integration and help designers plan the required spacing, pin layout and clearance distances.
Conclusion
The VMBHW Series offers a compact and flexible solution for isolated on-board power conversion. With 3.5 W output power, a 4:1 wide input range, regulated single or dual outputs, up to 5000 Vac isolation, reinforced insulation and an operating temperature range from -40 °C to +90 °C, the series is suitable for a broad range of applications in medical electronics, telecom/datacom, industrial control and distributed power systems.
