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12kW On-Board DC/DC Power Supply
12kW On-Board DC/DC Power Supply

This product operates within an input voltage range of 450–900 Vdc, with a rated output of 27.8 Vdc/12 kW. It employs water-cooled heat dissipation and features input overvoltage/undervoltage alarm and protection, output overcurrent alarm and protection, output overvoltage protection, output short-circuit protection, overtemperature protection, and CAN communication functionality. Suitable for various new energy vehicles including pure electric, hybrid, and range-extended models.

Technical Specifications

ProjectMinimumTypicalMaximumUnitConditions
Environmental Conditions
Operating Temperature-40-60
Storage temperature-40-85
Relative humidity5-95%No condensation during normal operation
Elevation0-3000m
Heat dissipation methodWater-cooledWater flow rate > 16 L/min, inlet water temperature not exceeding 60°C
Dustproof and waterproofIP67
Input Characteristics
Rated Input Voltage540VdcThe input end features reverse polarity protection.
Input Voltage Range450900Vdc
Maximum Input Current--35A450V dc input, full load.
Static leakage current--3mAWhen the auxiliary power supply is not energized and the main power supply does not start, measure the input current at the rated input condition of the main power supply.
Output Characteristics
Rated Output Voltage27.8VdcRated input and output at half load.
Output voltage setting27.8±0.3Vdc
Output Current Range0-432AInductive loads such as motors must be connected to the battery.
Maximum Output Current432AMaximum continuous operating current
Output rated power12000W
Peak output power13000WPeak power: 13,000W Operating time: 6 minutes
Overall efficiency-94-%Rated voltage input, full-load output conditions
Temperature coefficient--±0.02%/℃
Output ripple and noise--600mVp-pThe oscilloscope bandwidth should be 20 MHz. Connect a 10uF capacitor in parallel with a 104 ohm resistor to the probe. Perform testing with the output carrying a load exceeding 5%.
Boot-up time--3S
Output rise time--600ms
Current stability accuracy--±2%
Static leakage current--6mALeakage current when the output terminals are connected in parallel to a 24Vdc battery without being connected to high-voltage power supply or 24Vdc control power.
Control MethodCAN Control/EN Control/
Capacitive load--45000uF
Dynamic Response Voltage Overshoot Magnitude15%Load variation: 30% to 80% to 30%, load change rate ≤ 0.1 A/μs, dynamic load frequency range: 50 Hz to 5 kHz.
Input continuous power cyclingSupport/Under normal control signal input and output conditions, the input can withstand five consecutive on-off cycles within one minute without causing power supply failure or damage.


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