What is the difference between VQFP, HVQFP, TQFP & PQFP?
VQFP - Very Thin Quad Flat Pack. Around 0.8 mm thick.
HVQFP - Heatsink Very thin Quad Flat Pack. Also around 0.8 mm.
TQFP - Thin Quad Flat Pack. Typically 1mm thick.
LQFP - Low-profile Quad Flat Pack. Typically 1.4 mm thick.
PQFP - Plastic Quad Flat Pack. Thickness from 2 mm up-to 3.8 mm.


Since you were interested in HVQFP, here's an image from Digikey. This one allows you to mount a heatsink at the top for better dissipation.