产品特点 FEATURES

1 Universal AC input range: 85-264VAC, suitable for global mains

2 Regulated isolated 24V output, SELV compliant

3 Maximum power output: 400W

4 High efficiency: Up to 91.4% at 230V full load (excluding input rectifier losses)

5 Built-in EMI filtering for compliance with relevant standards

6 Dual mounting options: Chassis-mount or board-mount

7 Wide temperature operation: Two grades including -40°C to 100°C case temp

8 Robust VIA package with versatile thermal management (single/double side cooling)

9 High power density: 127W/in³

10 Self-protecting features: Overvoltage, overcurrent, short circuit, overtemperature protection

11 High MTBF for reliable operation

12 Requires external rectification and transient protection components

使用场景 APPLICATIONS

1 Telecom infrastructure: Small-cell base stations and telecom switching equipment needing stable 24V power with PFC

2 Industrial power systems: Automation equipment, motor drives, relays requiring efficient AC-DC conversion

3 LED lighting installations: High-efficiency power supply for large-scale LED arrays

4 PCB-mount applications: Integration into printed circuit boards for loads like fans, motors, or lighting (with downstream DC-DC converters for precise regulation)

5 Chassis-mount applications: Cost-effective setups without PCB, allowing access to both sides of the module for enhanced cooling

6 Industrial control systems: Reliable power for sensors, controllers, and other industrial electronics

注意事项 PRECAUTIONS

1 External components required: Rectifier, transient protection (MOV), output bulk capacitor (27k-60k µF, min 40k µF recommended)

2 Input fuse selection: Use Littelfuse 216 Series 8A or lower current rating (match system requirements)

3 Source inductance limit: Max 1mH for universal input (85-264VAC), max 2mH for 240V nominal only

4 Thermal management: Ensure proper cooling (single/double side) to stay within safe operating area (case temp ≤100°C)

5 Constant-power load handling: Delay enabling until module output reaches 24V steady state to avoid restart loops

6 Protective earth connection: Chassis must be connected to protective earth for safety compliance

7 ESD protection: Handle with ESD precautions (HBM 1000V, CDM 200V)

8 Fault recovery: Output overvoltage (OVP) requires input power recycle; overcurrent/short circuit trigger auto-restart cycles

9 Hold-up capacitance: Calculate based on system hold-up time and output power using provided formula

10 EMI compliance: Use external off-the-shelf EMI filter for EN55022 Class B conducted emissions

11 No internal fuse: System-level input fusing is mandatory for thermal protection

PFM4914VB6M24D0T00-PDF数据手册-参考资料