VANNER
Incorporated OWNER’S MANUAL
Vanner High Voltage DC-DC Converter OWNER’S MANUAL
Operation
Converter Start Up/Normal Operation
In order for the HBA to start successfully, the following conditions must be met;
1. The low voltage battery shall be between 16 –32 VDC.
2. The high voltage battery shall be between 500 –800 VDC.
3. The converter must receive a +24V enable signal on Pin A of the circular I/O connector.
a. For vehicles with pre MY2013 engines, the wakeup signal may come from the engine oil
pressure switch.
b. For vehicles with MY2013 engines or newer, the wakeup signal originates from the hybrid
drive train transmission control module. Contact Vanner engineering for details.
4. The converter must receive a CAN message to turn on.
a. For vehicles with pre MY2013 engines; the HBA must receive an engine RPM signal via
CAN message. The engine speed must be equal to or greater than 400 RPM for 0.1
second. (After start up, the HBA will shut down if the engine speed is less than 350 RPM
for 4.0 seconds.)
b. For vehicles with MY2013 engines or newer; the HBA On/Off controls are handled via
CAN message from the hybrid drive train controller. Note: Contact Vanner engineering
for the latest version of the HBA CAN Messages Specification.
Normal Operation
The HBA can provide up to full rated output (250 or 300 amps) of continuous current and maintain 29
volts out across a DC input range of 550 –800 volts. It can maintain this output in ambient
temperature conditions of -40° to +60°C.
HV Battery Under Voltage Condition –250A Unit
The DC to DC converter will begin to current limit if the input voltage drops below 550V. It will current
limit linearly from 250A –0A between 550V and 500V. (See chart on page 4.) The converter will
shut down completely if the input voltage drops below 500V. Once the input voltage is equal to or
greater than 550V, the converter will restart automatically.
HV Battery Under Voltage Condition –300A Unit
The DC to DC converter will begin to current limit if the input voltage drops below 600 volts. It will
current limit linearly from 300A –250A between 600V and 550V. The converter will continue to
current limit linearly from 250A –0A between 550V and 500V. (See chart on page 4.) The converter
will shut down completely if the input voltage drops below 500 volts. Once the input voltage is equal
to or greater than 550V, the converter will restart automatically.
HV Battery Over Voltage Condition
The DC to DC converter will perform a soft shutdown if the input voltage is above 800V and below
850V. It will restart automatically once the input voltage drops below 750V.
If the input voltage exceeds 850V, the converter will “permanently” shutdown. The unit will not restart
automatically if the input voltage drops below 750V, the ignition switch must be cycled off and on.
LV Battery Conditions
The low voltage battery must be greater than 16V but less than 32V for the HBA to start.
If the low voltage battery drops below 15V or goes above 32V, the HBA will perform a soft shutdown.
The converter will restart automatically if the voltage returns to the normal operating range of 16 –
32V.
