JAJST56D October 2001 – February 2024 TFP410
PRODUCTION DATA
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The TFP410 is available in TI’s thermally enhanced 64-pin TQFP PowerPAD package. The PowerPAD package is a 10mm × 10mm × 1.0mm TQFP outline with 0.5mm lead-pitch. The PowerPAD package has a specially designed die mount pad that offers improved thermal capability over typical TQFP packages of the same outline. The TI 64-pin TQFP PowerPAD package offers a backside solder plane that connects directly to the die mount pad for enhanced thermal conduction. For thermal considerations, soldering the backside of the TFP410 to the application board is not required because the device power dissipation is well within the package capability when not soldered.
Soldering the backside of the device to the PCB ground plane is recommended for electrical considerations. Because the die pad is electrically connected to the chip substrate and hence chip ground, connecting the back side of the PowerPAD package to a PCG ground plane provides a low-inductance, low-impedance connection to help improve EMI, ground bounce, and power supply noise performance.
Table 7-1 contains the thermal properties of the TI 64-pin TQFP PowerPAD package. The 64-pin TQFP non-PowerPAD package is included only for reference.
PARAMETER | WITHOUT PowerPAD™ | PowerPAD™ NOT CONNECTED TO PCB THERMAL PLANE | PowerPAD™ CONNECTED TO PCB THERMAL PLANE(1) | |
---|---|---|---|---|
RθJA | Thermal resistance, junction-to-ambient(1)(2) | 75.83°C/W | 42.20°C/W | 21.47°C/W |
RθJC | Thermal resistance, junction-to-case (1)(2) | 7.80°/W | 0.38°C/W | 0.38°C/W |
PD | Power handling capabilities of package (1)(2)(3) | 0.92 W | 1.66 W | 3.26 W |