Product Description
EV Power Supply 200V~750V to 27.5V DC DC Module 3KW
High-efficiency DC-DC converter (200V-750V to 27.5V) for electric vehicles: key functions & applications.
Product Highlights
- Wide Input Range – 200V–750Vdc, compatible with various EV battery packs
- Stable 27.5V Output – 125A continuous current, 3KW rated power
- Ultra-High Efficiency – Peak >96% (LLC resonant topology)
- Galvanic Isolation – 1.5kV isolation for enhanced safety
- CAN 2.0 Communication – Seamless integration with vehicle control systems
- Compact & Lightweight – 200×120×55mm, only 1.9kg
Ideal for electric vehicles, buses, and commercial EVs requiring stable low-voltage power from high-voltage traction batteries.
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 Specifications
| 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 | CAN 2.0 |
| 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
-
Compact industrial-grade DC/DC converter
-
High-efficiency design (>96%)
-
Rugged IP20 enclosure with water cooling
-
CAN bus communication enabled
-
Galvanic isolation (1.5kV) for safety
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. Key Technical Keywords
- High-voltage to low-voltage DC-DC converter
- Isolated step-down converter
- Automotive-grade power supply
- Wide input range (200V-750V)
- 27.5V/125A output
- 96% peak efficiency
- EV DC-DC Converter
- EV DC DC Module 3KW
- EV auxiliary power module
- Battery management system (BMS)
- Electric bus low-voltage network
