TL4242 Isolation from Thermal Pad

Jon4269

Other Parts Discussed in Thread: TL4242

Hi Forum,

Is the thermal pad on the TL4242 fully isolated? We measured the resistance to be between 8M-11MOhm between the thermal pad and pins 1, 3, 4, and 5. Is this acceptable?

Measuring equipment : FLUKE 179 TRUE RMS MULTIMETER.

-Jon

over 14 years ago

0 Dick Stacey over 14 years ago

TI__Genius 14890 points

Jon,

The TL4242 die is connected to the pad through a resistive die attach. I would suggest you tie the pad to ground. Page 12 of the TL4242 datasheet (THERMAL INFORMATION) has a statement "The thermal pad must be soldered directly to the printed circuit board". Therefore, it must be electrically connected to ground and not left floating.

Regards,

Dick

0 Jon4269 over 14 years ago in reply to Dick Stacey

TI__Intellectual 1870 points

Hi Dick,

Thank you very much!

-Jon

Power management

Power management forum

TL4242 Isolation from Thermal Pad