I. Core Working Principle

　　Dual-Core Architecture: High-Efficiency Conversion + Reliability Control: Integrates a PWM-based conversion module (pulse width modulation circuit + synchronous rectification) with a multi-layer protection system. The conversion module transforms input DC voltage (20-36V or 36-72V, two mainstream ranges ) into stable output (12V/24V/48V) with ≥80% efficiency , while the control system monitors voltage/current in real time. All processing runs on edge computing to reduce latency, critical for base station real-time operation.

　　Base Station Adaptation Logic: Optimizes for harsh telecom environments—adopts fanless convection cooling (avoids dust accumulation in remote stations) and wide operating temperature design (-20℃~60℃ ) to withstand extreme weather. The system prioritizes continuous operation: auto-recovers from overload/short-circuit faults (hiccup mode) without manual intervention.

　　Space-Saving Integration: Compact layout (215×115×50mm max ) fits standard base station equipment racks, with lightweight design (1200g/unit) for easy installation in tower-mounted or cabinet-based stations.

　　II. Key Features (Telecom Base Station-Optimized)

　　1. High-Performance Electrical Specifications

　　Precise Voltage Regulation:

　　Output Accuracy: ±1.0%~±2.0% (48V models reach ±1.0% ), meeting YD/T 733-94 telecom standards .

　　Low Ripple & Noise: ≤200mV peak-to-peak for 24V/48V outputs (critical for signal transmission stability ).

　　Wide Input Range: Dual versions cover 20-36V (B-type) and 36-72V (C-type) to adapt to different regional power grids.

　　Energy Efficiency:

　　Conversion Efficiency: 80%~84% (48V models peak at 84% ), exceeding the 75% minimum requirement for high-voltage outputs .

　　Low Standby Loss: <0.5W when idle, compliant with telecom energy-saving policies.

　　2. Telecom-Grade Protection & Durability

　　Multi-Layer Fault Protection:

　　Overload: 105%~150% rated current triggers hiccup mode (auto-recover).

　　Short Circuit: Long-term protection with automatic reset after fault removal.

　　Over Power: 120%~135% load cutoff to prevent component burnout .

　　Isolation Protection: 1.5KVAC (input-output) and 2.0KVAC (input-ground) withstand voltage .

　　Environmental Resilience:

　　Temperature Adaptation: Operates at -20℃~60℃ (stores at -40℃~85℃) for desert/mountainous base stations.

　　Humidity Resistance: 20%~90% RH (non-condensing) to handle coastal high-humidity environments.

　　Long Lifespan: 100,000+ hours MTBF (MIL-HDBK-217F standard ) with anti-aging electrolytic capacitors.

　　3. Maintenance-Friendly Design

　　Fanless Operation: Convection cooling eliminates mechanical failure risks (ideal for unmanned remote stations ).

　　Visual Status Indicators: LED lights for power-on, overload, and fault states (simplifies on-site troubleshooting).

　　Standardized Interfaces: Compatible with 35mm DIN rails and terminal block connections (matches base station equipment norms).

　　4. Compliance & Certification

　　Industry Standards: Meets YD/T 733-94 (China telecom module power supply standard ) and LVD design requirements.

　　Safety Certifications: TUV EN62368-1 certified , compliant with global telecom equipment safety regulations.

　　III. Recommended 300W DC-DC Power Supplies

　　SD-300 Series (All-Round Telecom Grade):

　　Core Highlights: 3 output voltages (12V/24V/48V), dual input ranges (20-36V/36-72V), 80%+ efficiency, fanless cooling, 3-year warranty .

　　Ideal For: Standard macro base stations and indoor distributed systems; fits most telecom scenarios.

　　Key Specs: 215×115×50mm, 1200g, MTBF >100,000hrs, -20℃~60℃ operating temp, IP20 protection.

　　GaN-Based High-Density Model (Efficient Premium):

　　Core Highlights: Gallium Nitride (GaN) power ICs, 94%+ efficiency , 700kHz switching frequency, 1W/cc power density (300cc size).

　　Ideal For: Space-constrained small-cell base stations and 5G dense deployment scenarios.

　　Key Specs: 180×100×45mm, 1000g, totem-pole PFC topology, TUV/UL certified.

　　Economy Basic Model (Cost-Effective):

　　Core Highlights: 48V fixed output, 36-72V input, 82% efficiency, basic protection (overcurrent/short circuit), 2-year warranty.

　　Ideal For: Rural remote base stations and budget-sensitive projects.

　　Key Specs: 200×110×48mm, 1100g, free air convection cooling, YD/T 733-94 compliant.

　　IV. Purchasing & Usage Guidelines

　　1. Selection Criteria (By Base Station Scenario)

　　By Environment:

　　Extreme Climate (Desert/Mountain): SD-300 Series (-20℃~60℃ wide temp range).

　　Urban Small Cells: GaN-Based Model (high power density, space-saving).

　　Rural Areas: Economy Basic Model (cost-effective, reliable core functions).

　　By Electrical Requirements:

　　48V Equipment (mainstream base station equipment): SD-300B-48 (84% efficiency, ±1.0% accuracy ).

　　Low-Voltage Loads (12V sensors): SD-300C-12 (25A high current output).

　　By Compliance Needs:

　　Global Deployment: GaN-Based Model (TUV/UL dual certification).

　　China Domestic Use: SD-300 Series (YD/T 733-94 compliant).

　　2. Installation & Maintenance Tips

　　Pre-Deployment Preparation:

　　Input Voltage Matching: Select B-type (20-36V) or C-type (36-72V) based on base station power distribution system .

　　Heat Dissipation Check: Ensure 5cm clearance around the power supply for convection cooling (critical for fanless models).

　　Routine Maintenance:

　　Monthly: Inspect LED indicators and clean dust from ventilation grilles (prevents overheating).

　　Quarterly: Verify output voltage stability (use multimeter to check deviation ≤±1%).

　　Fault Handling:

　　Overload Hiccup: Reduce load to ≤100% rated current—unit auto-recovers within 3s.

　　No Output: Check input voltage (must be within 20-36V/36-72V range) and power connections.

　　3. Pitfall Avoidance (Telecom-Specific Risks)

　　Efficiency Verification:

　　Reject models claiming "80% efficiency" without load-specific data—test 100% load (300W) to confirm actual efficiency ≥80% .

　　Avoid silicon-based models with <75% efficiency (violates telecom energy standards).

　　Reliability Checks:

　　Verify MTBF: Request manufacturer’s MIL-HDBK-217F test report (must exceed 100,000hrs).

　　Test Protection Functions: Simulate short circuit (output terminals) to ensure auto-recovery (no permanent damage).

　　Compliance Validation:

　　Check Certifications: Demand YD/T 733-94 test report (for China) and TUV EN62368-1 certificate (for global use).

　　Reject "generic industrial power supplies"—telecom-grade models require dedicated electromagnetic compatibility (EMC) design for signal interference prevention.

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