THERMAL METRIC (1)
|
TPSM41625 |
UNIT |
MOV (QFN) |
69 PINS |
RθJA
|
Junction-to-ambient thermal resistance (2)
|
13.8 |
°C/W |
ψJT
|
Junction-to-top characterization parameter (3)
|
4.4 |
°C/W |
ψJB
|
Junction-to-board characterization parameter (4)
|
9.8 |
°C/W |
TSHDN
|
Thermal Shutdown Temperature |
165 |
°C |
Thermal Shutdown Hysteresis |
30 |
°C |
(2) The junction-to-ambient thermal resistance, RθJA, applies to devices soldered directly to a 90 mm × 90 mm, 6-layer PCB with 2 oz. copper and natural convection cooling. Additional airflow reduces RθJA.
(3) The junction-to-top characterization parameter, ψJT, estimates the junction temperature, TJ, of a device in a real system, using a procedure described in JESD51-2A (section 6 and 7). TJ = ψJT × Pdis + TT; where Pdis is the power dissipated in the device and TT is the temperature of the top of the device.
(4) The junction-to-board characterization parameter, ψJB, estimates the junction temperature, TJ, of a device in a real system, using a procedure described in JESD51-2A (sections 6 and 7). TJ = ψJB × Pdis + TB; where Pdis is the power dissipated in the device and TB is the temperature of the board 1mm from the device.