AN2334

Car door module description

5/22

1

Car door module description

This note describes a complete electronic module used to drive all loads in a car door,

connected via a LIN bus to the dashboard and to other doors, and via a parallel port to a PC

(for demonstration purposes). The block diagram in Figure 1 shows the system

configuration.

Figure 1.

Door module block diagram

Table 1.

Door module actuators

Actuators

Working

voltage

Load

speed

(Typ)

Load

current

(Typ)

Stall

current

Window Lift

1 DC motor

12 V

>78 rpm

<2.5A

<20A

Door lock

1 DC motor

<2A

<10A

Mirror axis

control

2 DC motors

Mirror fold

1 DC motor

Mirror defroster

1 grounded resistive

load

100W

Light bulbs

4 grounded resistive

loads

5W