Is it possible to control several HBs supplied by two different power sources with TLE9210x?

[yananwang]

In some applications, HBs are supplied by two different power sources. Is it possible to use one TLE9210x to drive two groups of half-bridges supplied by two power sources?

[yananwang · Accepted solution]

Yes it is possible to use a wired OR gate to supply the device selectively with VS1 or VS2, as is shown in following picture. So, the device always sees the higher voltage between VS1 and VS2.

With this configuration, CSIN1 is configured as the reference of drain-source monitoring of HBs supplied by VS1. VS2 is connected to DH pin, and is configured as the reference of drain-source monitoring of HBs supplied by VS2. With this configuration, the device can monitor the VDS of all HBs. So, drain-source monitoring works correctly.