Datasheet

Paralleled operation L6226Q
20/29 Doc ID 14335 Rev 5
Figure 15. Parallel connection for higher current
To operate the device in parallel and maintain a lower over current threshold, half bridge 1
and the half bridge 2 of the bridge A can be connected in parallel and the same done for the
bridge B as shown in Figure 16. In this configuration, the peak current for each half bridge is
still limited by the bond wires for the supply and sense pins so the dissipation in the device
will be reduced, but the peak current rating is not increased.
When connected in this configuration the over current detection circuit, senses the sum of
the current in upper devices connected in parallel. With the enables connected in parallel,
an over current will turn of both bridges. Since the circuit senses the total current in the
upper devices, the over current threshold is equal to the threshold set the resistor R
CLA
or
R
CLB
in Figure 16. R
CLA
sets the threshold when outputs OUT1
A
and OUT2
A
are high and
resistor R
CLB
sets the threshold when outputs OUT1
B
and OUT2
B
are high.
It is recommended to use R
CLA
= R
CLB
.
In this configuration, the resulting bridge has the following characteristics.
● Equivalent device: FULL BRIDGE
● R
DS(on)
0.37 Ω typ. value @ T
J
= 25 °C
● 1.4 A max RMS load current
● 2.8 A max OCD threshold