Description
TDK-Lambda RM15-4R0GB
Technical Specifications
- Product type: Isolated DC-DC converter module
- Input voltage: 9V to 36V DC
- Output voltage: 4.0V DC
- Output power: 15W
- Output current: Max 3.75A
- Isolation voltage: 1500V DC
- Efficiency: Up to 88%
- Operating temperature: -40 °C to +85 °C
- Storage temperature: -55 °C to +125 °C
- Humidity: 5% to 95%, non-condensing
- Mounting: Through hole soldering on PCB
- Protection: Over current, over voltage, over temperature, short circuit protection
- Certification: CE, UL safety certification
Functional Features
- Wide DC input range 9V to 36V
- Regulated fixed 4.0V output
- 1500V DC isolation between primary and secondary
- High power conversion efficiency
- Integrated multiple fault protection
- Remote on/off control function
- Low output ripple and electromagnetic noise
- Encapsulated brick form factor
- Capacitor-less internal design
- Wide temperature operation capability
Application Scenarios
- Industrial controller board local power supply
- Communication network equipment embedded power
- Automated test and measurement instrument
- Transportation electronic control units
- General embedded low voltage logic power
Materials and Construction
- Housing: Metal alloy brick shell
- Internal substrate: High frequency FR4 PCB
- Magnetic part: Shielded high frequency transformer and inductor
- Power device: High speed MOSFET
- Encapsulation: Thermally conductive epoxy potting compound
- Connection pins: Tin plated copper through-hole pins
Structural Features
- Standard brick encapsulated rectangular module
- Through-hole pins arranged along one edge for PCB soldering
- Fully potted internal electronics for vibration resistance
- Metal shell for heat spreading and EMI shielding
- High frequency transformer for galvanic isolation
- Compact sealed package against dust and mechanical shock
Working Principle Wide range DC input drives high frequency switching circuit. The high frequency transformer provides galvanic isolation. Secondary rectifier and filter generate stable 4.0V DC output. Feedback loop monitors output voltage and dynamically adjusts switching duty cycle to keep output voltage constant. Over current, over voltage or over temperature events trigger shutdown protection to safeguard module and connected load.
Installation Requirements
- Solder pins onto host PCB matching footprint specification
- Place input and output ceramic capacitors adjacent to module pins
- Apply thermal interface material if high load operation requires heat sink
- Operate within ambient temperature -40 °C to +85 °C
- Configure remote on/off pin according to system power sequencing
- Minimize trace length of input and output circuit
Precautions
- Input polarity must be correct before power on
- Do not exceed maximum rated output current
- Module shell becomes hot under continuous full load
- Apply ESD protection during handling
- Store spare modules inside anti-static bags
- Avoid bending or stressing solder pins
- Prevent condensation on module surface at low temperature
