Component description for DC/DC converter control unit - GF54.10-P-3006GQH

MODEL 164.195 with ENGINE 272.973 

Vehicle phantom view 

Location 

The DC/DC converter control unit (N83/1) is integrated into the DC/DC converter module and is located in the upper engine compartment on the engine.

Interlock circuit

The interlock circuit serves to provide contact protection of persons against accidental touching of high-voltage components. A 12 V/20 mA interlock signal is looped for this purpose through all of the removable or openable components in the high-voltage system. To do this there is a contact bridge in each removable high-voltage connection which interrupts the interlock circuit during removal of the high-voltage connection. The interlock circuit is also led switched in a series over the 12 V control unit plug connection of the high-voltage components.

View of DC/DC converter module 

Task 

General 

The DC/DC converter control unit is a bidirectional DC voltage converter, which generates high and low voltages, and transfers them between the high and low voltage systems. The DC/DC converter control unit transforms the high voltage (primary voltage) into the low voltage (secondary voltage) or low voltage into high voltage. This enables compensation to be achieved for the battery power between the primary and secondary bus bars and the starting assistance function at an external voltage of 14 V.

Coding/flashing capability 

The DC/DC converter control unit is flashable i.e. the complete software in the control unit can be updated (replaced). The software required to program the control units is stored on the STAR DIAGNOSIS DAS Update DVD.

CAN data bus 

The DC/DC converter control unit is connected via the hybrid CAN (CAN L) to the vehicle's CAN network, and exchanges data with other control units.

Input and output signals 

The DC/DC converter control unit evaluates the following input signals and issues the corresponding output signals:

• Direct input signals 
• Direct output signals 
• CAN input signals 
• CAN output signals 

Direct input signals 

• Hybrid wake-up
• Circuit 30
• Circuit 31

Direct output signals 

• Circuit 30
• Circuit 31
• High voltage 288 V+
• High voltage 288 V -

Power connections 

• High voltage 288 V+
• High voltage 288 V -

CAN input signals 

Central gateway control unit (N93) 

• Request for diagnostic data

CAN output signals 

ME-SFI [ME] control unit (N3/10) 

• Error status, input and output current values for power electronics

Central gateway control unit (N93) 

• Diagnostic data

Power electronics control unit (N129/1) 

• Standby mode, status
• Boost mode, status
• Buck mode, status
• Jump starting mode, status

Wiring diagram for voltage converter

N83/1

PE54.10-P-2001-97MAA