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AUIRS2181(4)
Negative Vs Safety Operating Area (negVs SOA)
There could be conditions in which Vs node falls below (i.e. negative) VSS/COM nodes (e.g. because of
wrong system layout). This condition should be avoided because it could bring to uncontrolled behavior of
the driver.
The negVs SOA identifies the energy of negative Vs pulses at which the driver can withstand; pulse energy
is identified as the product of pulse duration by its amplitude. Fig. 16 shows the negVs SOA of
AUIRS2181(4)S at both ambient and over temperature conditions. Test conditions were VCC=VBS=15V
referenced to VSS=COM.
Even though the AUIRS2181(4)S has been designed and tested to handle these negative VS transient
conditions, it is highly recommended that the circuit designer always limit the negative VS transients as much
as possible by careful PCB layout and component use.
Fig. 16 Negative Vs SOA of AUIRS2181(4)S.
Package Details: SOIC8
1
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? 2013 International Rectifier
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October 9, 2013
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