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[FAQ] TMP61/TMP63/TMP64 - Can the TMP61, TMP63, TMP64 be soldered to an Aluminum PCB (IMS)?

Other Parts Discussed in Thread: TMP61, TMP63, TMP64

Can the TMP61, TMP63, TMP64 be soldered to an Aluminum PCB (IMS)?

  • Aluminum PCB's (so called IMS, Insulated Metal Substrate) have different mechanical stretch properties when compared with FR4 PCB's. This leads to an effective method of heat dissipation across the circuit board.

    Circuit designers may find difficulty selecting SMD components that do not crack after reflow due to the different thermal expansion.

    However, the DYA (0603) package of the TMP6x family of devices can be used for the application. The DYA package can be soldered on IMS because the package leads have a tendency to allow for flexing.

    There still needs to be consideration to the layout. Care should be taken to have a balanced amount of copper on either sides to ensure one side does not cool much faster than another and to have proper thermal expansion.