SFFS669 august   2023 UCC14340-Q1 , UCC14341-Q1

 

  1.   1
  2.   Trademarks
  3. 1Overview
  4. 2Functional Safety Failure In Time (FIT) Rates
    1. 2.1 DWN-36 Package
  5. 3Failure Mode Distribution (FMD)
  6. 4Pin Failure Mode Analysis (Pin FMA)
    1. 4.1 DWN-36 Package

4.1 DWN-36 Package

Figure 4-1 shows the UCC1434x-Q1 pin diagram for the DWN-36 package. For a detailed description of the device pins, see the Pin Configuration and Functions section in the UCC1434x-Q1 data sheet.

GUID-9EE91CB7-9766-4FBF-AF81-10255FCD54EF-low.svgFigure 4-1 Pin Diagram (DWN-36) Package
Table 4-2 Pin FMA for Device Pins Short-Circuited to Ground
Pin NamePin No.Description of Potential Failure Effect(s)Failure Effect Class
GNDP1No effect.D
GNDP2No effect.D
PG3PG is always low. MCU can't detect the status of the bias supply.C
ENA4Device is disabled. No output.B
GNDP5No effect.D
VIN6Device is not powered. No output.B
VIN7Device is not powered. No output.B
GNDP8No effect.D
GNDP9No effect.D
GNDP10No effect.D
GNDP11No effect.D
GNDP12No effect.D
GNDP13No effect.D
GNDP14No effect.D
GNDP15No effect.D
GNDP16No effect.D
GNDP17No effect.D
GNDP18No effect.D
VEE19No effect.D
VEE20No effect.D
VEE21No effect.D
VEE22No effect.D
VEE23No effect.D
VEE24No effect.D
VEE25No effect.D
VEE26No effect.
VEE27No effect.D
VDD28Device is disabled. No output.B
VDD29Device is disabled. No output.B
VEE30No effect.D
VEE31No effect.D
RLIM32Device is disabled. No output.B
FBVEE33Device is disabled. No output.B
FBVDD34Device is disabled. No output.B
VEEA35No effect.D
VEE36No effect.D
Table 4-3 Pin FMA for Device Pins Open-Circuited
Pin NamePin No.Description of Potential Failure Effect(s)Failure Effect Class
GNDP1No effect. D
GNDP2No effect.D
PG3MCU can't detect the status of the bias supply.C
ENA4Undetermined state. The device could be on or off, depending on the noise on ENA pin.B
GNDP5No effect.D
VIN6Device is disabled. No output.B
VIN7Device is disabled. No output.B
GNDP8Voltage ringing will increase above normal increasing voltage stress at maximum VIN voltage.C
GNDP9Voltage ringing will increase above normal increasing voltage stress at maximum VIN voltage.C
GNDP10No effect.D
GNDP11No effect.D
GNDP12No effect.D
GNDP13No effect.D
GNDP14No effect.D
GNDP15No effect.D
GNDP16No effect.D
GNDP17No effect.D
GNDP18No effect.D
VEE19No effect.D
VEE20No effect.D
VEE21No effect.D
VEE22No effect.D
VEE23No effect.D
VEE24No effect.D
VEE25No effect.D
VEE26No effect.D
VEE27No effect.D
VDD28Voltage ringing will increase above normal increasing voltage stress at maximum VIN voltage.C
VDD29Voltage ringing will increase above normal increasing voltage stress at maximum VIN voltage.C
VEE30Voltage ringing will increase above normal increasing voltage stress at maximum VIN voltage.C
VEE31Voltage ringing will increase above normal increasing voltage stress at maximum VIN voltage.C
RLIM32Device is disabled. No output.B
FBVEE33Device is disabled. No output.B
FBVDD34Device is disabled. No output.B
VEEA35No effect.D
VEE36No effect.D
Table 4-4 Pin FMA for Device Pins Short-Circuited to Adjacent Pin
Pin NamePin No.Shorted toDescription of Potential Failure Effect(s)Failure Effect Class
GNDP1GNDPNo effect.D
GNDP2PGDevice is disabled. No output.B
PG3ENADevice can't stay on because once output voltage is generated, PG will disable the deviceB
ENA4GNDPDevice is disabled. No output.B
GNDP5VINDevice is not powered. No output.B
VIN6VINNo effect.D
VIN7GNDPDevice is not powered. No output.B
GNDP8GNDPNo effect.D
GNDP9GNDPNo effect.D
GNDP10GNDPNo effect.D
GNDP11GNDPNo effect.D
GNDP12GNDPNo effect.D
GNDP13GNDPNo effect.D
GNDP14GNDPNo effect.D
GNDP15GNDPNo effect.D
GNDP16GNDPNo effect.D
GNDP17GNDPNo effect.D
GNDP18N/AN/AN/A
VEE19VEENo effect.D
VEE20VEENo effect.D
VEE21VEENo effect.D
VEE22VEENo effect.D
VEE23VEENo effect.D
VEE24VEENo effect.D
VEE25VEENo effect.D
VEE26VEENo effect.D
VEE27VDDDevice is disabled. No output.B
VDD28VDDNo effect.D
VDD29VEEDevice is disabled. No output.B
VEE30VEENo effect.D
VEE31RLIMDevice is disabled. No output.B
RLIM32FBVEERLIM will not regulate correctly.B
FBVEE33FBVDDVDD and RLIM can't regulate correctly.B
FBVDD34VEEADevice is disabled. No output.B
VEEA35VEENo effect.D
VEE36N/AN/AN/A
Table 4-5 Pin FMA for Device Pins Short-Circuited to supply
Pin NamePin No.Description of Potential Failure Effect(s)Failure Effect Class
GNDP1Device is not powered. No output.B
GNDP2Device is not powered. No output.B
PG3Exceed pin abs. max rating. Device damage is possible.A
ENA4Device is always enabled. Pin voltage exceeds abs. max rating. Device damage is possible.A
GNDP5Device is not powered. No output.B
VIN6No effect.D
VIN7No effect.D
GNDP8Device is not powered. No output.B
GNDP9Device is not powered. No output.B
GNDP10Device is not powered. No output.B
GNDP11Device is not powered. No output.B
GNDP12Device is not powered. No output.B
GNDP13Device is not powered. No output.B
GNDP14Device is not powered. No output.B
GNDP15Device is not powered. No output.B
GNDP16Device is not powered. No output.B
GNDP17Device is not powered. No output.B
GNDP18Device is not powered. No output.B
VEE19Device is disabled. No output.B
VEE20Device is disabled. No output.B
VEE21Device is disabled. No output.B
VEE22Device is disabled. No output.B
VEE23Device is disabled. No output.B
VEE24Device is disabled. No output.B
VEE25Device is disabled. No output.B
VEE26Device is disabled. No output.B
VEE27Device is disabled. No output.B
VDD28No effect.D
VDD29No effect.D
VEE30Device is disabled. No output.B
VEE31Device is disabled. No output.B
RLIM32Device is disabled. No output.B
FBVEE33Device is disabled. No output.B
FBVDD34Device is disabled. No output.B
VEEA35Device is disabled. No output.B
VEE36Device is disabled. No output.B