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Thermal resistance and power dissipation

HH1992
Prodigy 120 points
Other Parts Discussed in Thread: ADS131M08, LMP2022, SN74LV4T125, SN74AUP2G80, SN74LVC2T45, TCA9406

Hello,
We are working on a medical robot and as a part of the system, we have designed an electronic board that we needed to calculate reliability for it. We are going to calculate FIT based on MIL 217.
In this regard, we need some information related to reliability factors for some components. I've attached a table in which components are listed and some parameters are not found (Thermal resistance and power dissipation).
Would you please provide these parameters or the related documents?
Thanks

Hamed

IC Name

IC Type

NumberOfPin

Rth

Power Dissipation

Ea

#ofGate or Transistor

ADC-

ADS131M08

?

32

82

Dis:21.1m

 

<10000

Buffer-SN74LV4T125

MOSDigital?

14

127

Dis:?

0.65

<100

DFF-SN74AUP2G80

MOSDigital

8

220

Dis:?

0.35

<100

OPAMP-

LMP2022

MOSLinear

8

217

Dis:?

0.65

<300

Receiver-SN65HVD379

MOSDigit?

8

?

Dis:197m

0.65

<100

MAX232-MAX3232CSE

MOSDigit?

16

125

Dis:696m

0.65

<100

VoltageLevel-SN74LVC2T45DC

MOSDigit?

8

184

Dis:?

0.65

<100

VoltageLevel-TCA9406

MOSDigit?

8

182.6

Dis:?

0.65

<100
  • 0
    TI__Mastermind 45855 points

    Hi Hamed,

    Here is an FAQ to help obtain Pd(max) for the following devices:

    SN74LV4T125

    SN74AUP2G80

    SN74LVC2T45

    TCA9406

    I will assign this thread to the appropriate teams for the remaining devices.

  • 0
    TI__Guru 67601 points

    Hi Hamed,

    In case of linear op amps like LMP2022, the power dissipation is dominated by the output current (load) and the supply voltage used to power the IC.  Assuming  5V supply and the short-circuit current of 50mA, the maximum power dissipation would come to 250mW for a single channel and 500mW for both channels being short-circuited at the same time.

    The maximum power dissipation is a function of TJ(MAX), θJA, and TA. Thus, the maximum allowable power dissipation at any ambient temperature is PD = (TJ(MAX) - TA)/ θJA.