DC-DC Converter (200V-820V to 5V -27.5V,dual outputs) for Electric Vehicles: Key Functions & Applications
1. Core Functions
Voltage Step-Down: Converts high-voltage traction battery power (200V-820V) to stable 5V -27.5V,dual outputs for low-voltage systems.
Energy Efficiency: Typically achieves >93% efficiency ( LLC resonant topology).
| Technical Specification | Value |
|---|---|
| Input Voltage | 200V-820Vdc |
| Output Voltage | 5V -27.5Vdc,dual outputs |
| Max Output Current | 50A+60A |
| Rated Power | 3KW |
| Maximum Power | 3KW |
| Peak Efficiency | >96% |
| Protection Rating | IP20 (Natural Cooling) |
| Communication Interface | CAN2.0 |
| Dimensions (L×W×H) | 280×160×64mm |
| Unit Weight | 3.35KG |
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 (>93%)
Rugged IP67 enclosure
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-820V)`, `5V -27.5V,dual outputs`, `93% 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`
