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| TLE42744_14 Datasheet, PDF (15/21 Pages) Infineon Technologies AG – Very Low Current Consumption | |||
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TLE42744
Application Information
RthJA,max = (Tj,max â Ta) / PD
= (150 °C â 85 °C) / 2.3275 W
= 27.93 K/W
As a result, the PCB design must ensure a thermal resistance RthJA lower than 27.93 K/W. By considering
TLE42744GV50 (PG-TO263-3 package) and according to âThermal Resistanceâ on Page 7, only the FR4 2s2p
board is applicable.
6.4
Reverse Polarity Protection
TLE42744 is self protected against reverse polarity faults and allows negative supply voltage. External reverse
polarity diode is not needed. However, the absolute maximum ratings of the device as specified in âAbsolute
Maximum Ratingsâ on Page 6 must be kept.
The reverse voltage causes several small currents to flow into the IC hence increasing its junction temperature.
As the thermal shut down circuitry does not work in the reverse polarity condition, designers have to consider this
in their thermal design.
Data Sheet
15
Rev. 1.2, 2014-07-03
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