Part Number: DP83848K
Other Parts Discussed in Thread: DP83848J, DP83848C, DP83848VYB, , DP83848I, DP83848YB
Hello?
I feel it is wrong at thermal information in datasheet, so I write this thread.
Normally, I think junction-to-board thermal resistance(R_θJB) is lower than junction-to-ambient thermal resistance(R_θJA).
But thermal resistance of DP83848J/K is upside down.
This is table of compared with DP83848C/I & DP83848VYB/YB.
| Product Name |
DP83848J($0.80) DP83848K($0.95) |
DP83848C($2.15) DP83848I($2.20) |
DP83848VYB($14.20) DP83848YB($16.60) |
| Package | WQFN-40 | LQFP-48 | HLQFP-48 |
| R_θJA (Junction-to-ambient thermal resistance) | 31.7 °C/W | 73.9 °C/W | 40.1 °C/W |
| R_θJC(top) (Junction-to-case (top) thermal resistance) | 8.8 °C/W | 30.9 °C/W | 25.5 °C/W |
| R_θJB (Junction-to-board thermal resistance) | 40.5 °C/W | 37.2 °C/W | 21 °C/W |
| R_θJC(bot) (Junction-to-case (bottom) thermal resistance) | 5.5 °C/W | N/A | 3.6 °C/W |
I reviewed smaller & cheaper product is good in small system using RMII, but thermal information gives me embarrass.
Please review this point.
Thank you.
