DocID022028 Rev 3

17/27

L6206Q

Paralleled operation

27

6

Paralleled operation

The outputs of the L6206Q device can be paralleled to increase the output current capability

or reduce the power dissipation in the device at a given current level. It must be noted,

however, that the internal wire bond connections from the die to the power or sense pins of

the package must carry current in both of the associated half bridges.

parallel, the peak current rating is not increased as the total current must still flow through

one bond wire on the power supply or sense pin. In addition, the overcurrent detection

senses the sum of the current in the upper devices of each bridge (A or B) so connecting the

two halves of one bridge in parallel does not increase the overcurrent detection threshold.

For most applications the recommended configuration is half bridge 1 of bridge A paralleled

with the half bridge 1 of bridge B, and the same for the half bridges 2, as shown in

the devices on the same die is well matched. When connected in this configuration the

overcurrent detection circuit, which senses the current in each bridge (A and B), senses the

current in the upper devices connected in parallel independently and the sense circuit with

the lowest threshold trips first. With the enable pins connected in parallel, the first detection

of an overcurrent in either upper DMOS device turns off both bridges. Assuming that the two

DMOS devices share the current equally, the resulting overcurrent detection threshold is

In this configuration the resulting bridge has the following characteristics.



Equivalent device: full bridge





5 A max. RMS load current



11.2 A max. OCD threshold