SLVAEV4 June   2020 DRV8876-Q1

 

  1.   Trademarks
  2. 1Overview
  3. 2Functional Safety Failure In Time (FIT) Rates
  4. 3Failure Mode Distribution (FMD)
  5. 4Pin Failure Mode Analysis (Pin FMA)
    1. 4.1 HTSSOP Package

HTSSOP Package

Figure 4-1 shows the DRV8876-Q1 pin diagram. For a detailed description of the device pins please refer to the 'Pin Configuration and Functions' section in the DRV8876-Q1 datasheet.

GUID-04ED65BC-B902-4ECB-94A1-9C2FF5962CA9-low.gifFigure 4-1 DRV8876-Q1 Pin Diagram

Following are the assumptions of use and the device configuration assumed for the pin FMA in this section:

  • The device is used with external components consistent with the values described in the external component table of the datasheet.

Table 4-2 HW variant - Pin FMA for Device Pins Short-Circuited to Ground
Pin NamePin No.Description of Potential Failure Effect(s)Failure Effect Class
EN/IN11OUTx driver control will be lostB
PH/IN22OUTx driver control will be lostB
nSLEEP3Device will be in sleep state with OUTx HiZB
nFAULT4Device will always be signaling faultB
VREF5Sets current regulation limit ITRIP = 0 AB
IPROPI6Current sensing and regulation capability will be lostB
IMODE7Device IMODE configuration may be misinterpretedB
OUT18OUTx HiZ, with device signaling faultB
PGND9Intended operationD
OUT210OUTx HiZ, with device signaling faultB
VM11Device will not power upB
VCP12Device will be damaged with higher current draw from VMA
CPH13Device will be damaged with higher current draw from VMA
CPL14Device will be damaged with higher current draw from VMA
GND15Intended operationD
PMODE16Device PMODE configuration may be misinterpretedB
Table 4-3 HW variant - Pin FMA for Device Pins Open-Circuited
Pin NamePin No.Description of Potential Failure Effect(s)Failure Effect Class
EN/IN11OUTx driver control will be lostB
PH/IN22OUTx driver control will be lostB
nSLEEP3Device will be in sleep state with OUTx HiZB
nFAULT4Fault signaling will be lostB
VREF5Undefined ITRIP currentB
IPROPI6Current sensing and regulation capability will be lostB
IMODE7Device IMODE configuration may be misinterpretedB
OUT18OUTx impedance will be higher - device will not be able to drive the load properlyB
PGND9Device will not power upB
OUT210OUTx impedance will be higher - device will not be able to drive the load properlyB
VM11Device will not power upB
VCP12Charge pump unstable, possible damage to charge pumpA
CPH13OUTx HiZ, with device signaling faultB
CPL14OUTx HiZ, with device signaling faultB
GND15Device will not power upB
PMODE16Device PMODE configuration may be misinterpretedB
Table 4-4 HW variant - Pin FMA for Device Pins Shorted to Adjacent Pin
Pin NamePin No.Shorted to Pin No.Description of Potential Failure Effect(s)Failure Effect Class
EN/IN112OUTx driver control will be lostB
PH/IN223OUTx driver control will be lostB
nSLEEP34Device will go into sleep state whenever nFAULT is asserted low, device damage may occur if nFAULT sinks excess current from nSLEEP signalA
nFAULT45Device damage may occur if nFAULT sinks excess current from VREF signalA
VREF56Current regulation capability will be lost, OUTx driver control will be lostB
IPROPI67Current sensing and regulation capability will be lostB
IMODE78Device will be damaged with higher current draw from VMA
OUT189OUTx HiZ with device signaling faultB
PGND910OUTx HiZ with device signaling faultB
OUT21011OUTx HiZ with device signaling faultB
VM1112OUTx HiZ with device signaling faultB
VCP1213Device will be damaged with higher current draw from VMA
CPH1314Device will be damaged with higher current draw from VMA
CPL1415Device will be damaged with higher current draw from VMA
GND1516Device PMODE configuration may be misinterpretedB
PMODE161OUTx driver control will be lostB
Table 4-5 HW variant - Pin FMA for Device Pins Shorted to VM (High Voltage Supply)
Pin NamePin No.Description of Potential Failure Effect(s)Failure Effect Class
EN/IN11Device will be damaged with higher current draw from VMA
PH/IN22Device will be damaged with higher current draw from VMA
nSLEEP3Device will be damaged with higher current draw from VMA
nFAULT4Device will be damaged with higher current draw from VMA
VREF5Device will be damaged with higher current draw from VMA
IPROPI6Device will be damaged with higher current draw from VMA
IMODE7Device will be damaged with higher current draw from VMA
OUT18OUTx HiZ with device signaling faultB
PGND9Device will not power upB
OUT210OUTx HiZ with device signaling faultB
VM11Intended operationD
VCP12OUTx HiZ with device signaling faultB
CPH13Device will be damaged with higher current draw from VMA
CPL14Device will be damaged with higher current draw from VMA
GND15Device will not power upB
PMODE16Device will be damaged with higher current draw from VMA