EV Power Supply 200V~750V to 27.5V DC DC Module 3KW
DC-DC Converter (200V-750V to 27.5V) for Electric Vehicles: Key Functions & Applications
1. Core Functions
Voltage Step-Down: Converts high-voltage traction battery power (200V-750V) to stable 27.5V DC output for low-voltage systems.
Energy Efficiency: Typically achieves >96% efficiency ( LLC resonant topology).
Isolation Protection: Galvanic isolation (1.5kV) to prevent high-voltage leakage risks.
| Technical Specification | Value |
|---|---|
| Input Voltage | 200~750Vdc |
| Output Voltage | 27.5Vdc |
| Max Output Current | 125A |
| Rated Power | 3KW |
| Maximum Power | 3KW |
| Peak Efficiency | >96% |
| Protection Rating | IP20 (Water Cooling) |
| Communication Interface | CAN2.0 |
| Dimensions (L×W×H) | 200×120×55mm |
| Unit Weight | 1.9KG |
2. Primary Use Cases
| Application | Purpose | Example Components |
| Auxiliary Systems | Powers control units, lighting, sensors, and infotainment | ECU, LED headlights, ADAS cameras |
| Thermal Management | Drives coolant pumps,fans for battery, cabin climate control | PTC heaters, HVAC compressors |
| Safety Devices | Supplies emergency brakes, door locks, and crash sensors | ABS, SRS airbag systems |
Key features:
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Compact industrial-grade DC/DC converter
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High-efficiency design (>96%)
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Rugged IP67 enclosure
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CAN bus communication enabled
3. Critical Design Notes
Input Range Flexibility: Must tolerate EV battery voltage fluctuations (e.g., 750V during regen braking).
EMC Compliance: Meet CISPR 25 Class 3 for electromagnetic interference suppression.
Thermal Derating: Output current drops by 15% at ambient temperatures >85°C.
Protection Features: Required:
Overcurrent (OCP)
Short-circuit (SCP)
Overvoltage (OVP)
4. Keywords for Technical Documentation
`High-voltage to low-voltage DC-DC converter`, `Isolated step-down converter`, `Automotive-grade power supply`
Performance Metrics:
Wide input range (200V-750V)`, `27.5V/125A output`, `96% peak efficiency`, `EV DC-DC Converter`”EV DC DC Module 3KW”
Applications:
`EV auxiliary power module`, `Battery management system (BMS)`, `Electric bus low-voltage network`
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