L6226

Paralleled operation

Doc ID 9452 Rev 4

21/31

Figure 17.

Paralleling the four half bridges

6.1

Output current capability and IC power dissipation

In Figure 18 and Figure 19 are shown the approximate relation between the output current

and the IC power dissipation using PWM current control driving two loads, for two different

driving types:

●

One Full Bridge ON at a time (Figure 18) in which only one load at a time is energized.

●

Two Full Bridges ON at the same time (Figure 19) in which two loads at the same time

are energized.

For a given output current and driving type the power dissipated by the IC can be easily

evaluated, in order to establish which package should be used and how large must be the

on-board copper dissipating area to guarantee a safe operating junction temperature (125

°C maximum).

Figure 18.

IC power dissipation versus output current with one full bridge ON at a time