产品特点 FEATURES

1 Industry standard 1/16 brick form factor: Through hole version size is 33.02×22.86×9.40mm (1.30×0.90×0.37in), with surface mount option available

2 Wide input voltage range: 36-75Vdc, compatible with -48V/-60V telecom DC distribution systems

3 High output power: Maximum 70W total output power

4 Excellent efficiency: Typical 89.8% at 6.5V half load and 48V input, 88.8% at full load 48V input

5 Adjustable output voltage: Range from -20% to +10% of nominal 6.5V

6 Pre-biased startup capability: Does not sink current during startup if pre-bias source (≤75% of nominal output voltage) exists at output terminals

7 High isolation: 2250Vdc input-output isolation, compliant with basic insulation requirements per UL60950-1

8 Comprehensive protection features: Input under-voltage lockout, over-temperature protection, output over-voltage protection, output short-circuit protection, remote control function

9 High reliability: MTBF over 4.9 million hours (calculated at max output power and 40°C ambient temperature)

10 Safety compliance: Meets IEC/EN/UL60950 safety standards, all construction parts have V-0 flammability rating per IEC60695-11-10

11 Quality assurance: ISO9001/14001 certified supplier, highly automated manufacturing process

12 RoHS compliant: Compatible with RoHS directive 2002/95/EC, low content of restricted substances

使用场景 APPLICATIONS

1 Telecom equipment: Base stations, optical transmission devices, telecom power distribution units (PDUs) using -48V DC power supply

2 Industrial control systems: PLCs (Programmable Logic Controllers), DCS (Distributed Control Systems), industrial automation equipment

3 Data center and networking: Server power modules, network switches, routers, storage devices

4 Embedded systems: High-reliability embedded computers, industrial-grade embedded boards

5 Test and measurement instruments: Precision testing equipment requiring stable power conversion

6 Renewable energy monitoring: Devices for solar/wind power systems needing efficient DC/DC conversion from 36-75V input

7 Medical equipment: Compliant with safety standards for non-critical medical devices (after system-level validation)

注意事项 PRECAUTIONS

1 Input voltage: Do not exceed absolute maximum input voltage of 80Vdc; ensure input voltage transient does not exceed 100Vdc (per ETSI EN300132-2 and Telcordia GR-1089-CORE)

2 Remote control operation: Standard version uses negative logic—connect RC pin to -In to turn on, leave open to turn off; positive logic option (suffix "P"): leave RC pin open to turn on, connect to -In to turn off; ensure external device provides sufficient sink current to RC pin for reliable operation

3 Output voltage adjustment: Adjust using resistors between Vadj pin and +Out (increase) or -Out (decrease); do not exceed over-voltage protection (OVP) threshold (8.2V typ) to avoid shutdown; reduce max output current proportionally when increasing output voltage to keep power within rating

4 Thermal management: Monitor TP1 (opto-coupler position) temperature, ensure it does not exceed 105°C; provide adequate cooling (airflow or heat dissipation) based on load and ambient temp; refer to output current derating curve for different ambient temps and airflow

5 Soldering guidelines: For surface mount version—SnPb process: peak product temp ≤225°C, pin temp ≥210°C; Pb-free process: peak product temp ≤260°C, pin temp ≥235°C; for through-hole version—wave soldering: pin temp ≤270°C for max 10 seconds; use no-clean flux to avoid residue affecting reliability

6 Input/output capacitance: Minimum 100uF external input capacitor (low ESR) recommended; minimum 330uF external output capacitor required; use additional decoupling capacitors for dynamic load applications

7 Protection features: Over-temperature (OTP), over-voltage (OVP), over-current (OCP) protections are non-latching—product will attempt to restart automatically after fault condition is removed; short-circuit protection uses hiccup mode to reduce average power

8 Pre-bias startup: The converter will not sink current during startup if pre-bias voltage at output terminals is less than 75% of nominal output voltage

9 Storage and handling: Pb-free version is delivered in dry pack; follow J-STD-033 for moisture-sensitive device handling if stored in uncontrolled environment

PKU4717ESI-PDF数据手册-参考资料