产品特点 FEATURES

1 Brand: Vicor, Model: V300B28T250BG3

2 DC-DC converter module belonging to 300V Mini Family

3 Input voltage range: 180-375V DC; input surge withstand capacity: 400V DC for 100ms

4 Output specifications: 28V DC nominal voltage, 250W maximum output power

5 Isolated output: IN to OUT isolation voltage up to 3000V RMS (tested)

6 High efficiency: Up to 88.5% (typical value at nominal input, 75% load, 25°C)

7 Power density: Up to 100W per cubic inch

8 Temperature grade: T grade (operating temperature: -40 to +100°C; storage temperature: -40 to +125°C)

9 Programmable output voltage: 10-110% of nominal voltage (trim up/down via SC pin)

10 Regulation performance: ±0.4% from no load to full load; ±0.2% line regulation (low to high input); ±0.005%/°C temperature regulation

11 Parallelable: Supports N+M fault tolerance via PR pin interface

12 Low noise: Adopts ZCS/ZVS switching architecture

13 RoHS compliant: Pin style G (long RoHS, gold-plated)

14 Dimensions: 57.9x55.9x12.7mm (2.28x2.2x0.5 inches); height above board:10.9mm (0.43 inches)

15 Certifications: NRTL, cURus, cTÜVus, CE, UKCA (compliant with UL60950-1, EN60950-1 etc.)

使用场景 APPLICATIONS

1 Off-line power systems with auto-ranging or PFC front-end circuits

2 Industrial and process control equipment requiring stable 28V DC power

3 Distributed power architectures in communication systems (e.g., telecom base stations)

4 Automatic Test Equipment (ATE) needing high-precision voltage regulation

5 Redundant power arrays for critical systems (e.g., medical devices, data centers)

6 Applications demanding high power density and low noise DC-DC conversion from 300V input

7 Systems where remote voltage trimming or parallel operation for increased power is needed

注意事项 PRECAUTIONS

1 Do not exceed the maximum rated output current (8.93A for 28V 250W) under any conditions (normal/abnormal/test)

2 For dynamic loads exceeding 25% of rated current, contact Vicor Applications Engineering to confirm compatibility

3 Protect remote sense leads against reversal, noise pickup, open circuit, or excessive resistance; route sense leads close together or twisted to reduce noise

4 Output capacitance connected to the module must not exceed limits specified in the Maxi, Mini, Micro Design Guide

5 Follow recommended soldering methods: wave solder at ≤260°C for <5sec; hand solder at ≤390°C for <7sec

6 Store the module in ESD-safe packaging within the temperature range of -40 to +125°C (T grade)

7 When paralleling modules: use same input/output voltage and power level; connect PR pins via compatible interfaces (AC-coupled for up to 3 modules, transformer-coupled for 4+ modules)

8 Trim up/down guidelines: Trim down via resistor between SC and -S pins (available power reduces proportionally); trim up via resistor between SC and +S pins (do not exceed +10% of nominal voltage; reduce max output current proportionally)

9 Module alarm handling: PC pin goes low on fault (UV, OV, OT, internal fault); auto-restart cycle checks for fault clearance periodically

10 Mounting torque: Use 5 in.lbs (0.57 N.m) torque for baseplate screws

11 ESD precautions: Handle the module with anti-static measures to avoid damage to sensitive components

V300B28T250BG3-PDF数据手册-参考资料