DirectFET®; MOSFET: Heatsink Fastening
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Heat Sink Mounting
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Push Pins
- Requires 0.118” ~0.125” PC Board holes
- Brass or Nylon pins plus springs
- Typical force applied per pin ranges from 1 Lbs to max 5 Lbs
- Easy to attach, but only applicable to small heat sinks as they cannot withstand vibration
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Solder Anchor Chips
- Use .093” diameter holes on the board
- Heat sinks are attached to the Board, using S-Shaped clips hooked to two or four solder anchors
- Solder anchors have to be soldered on the board
- More secure attachment then the Push Pin method, but they do require extra part (Solder Anchors)
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Pins and Adhesive
- Dispense thermally conductive adhesive on board
Install and cure heatsink
- Pins can be installed in the heatsink to improve mechanical fastening
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VRM Clips
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| Spring clips clamp the PCB between two heatsinks
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IR’s proprietary DirectFET®; technology is covered by US Patent 6,624,522 and
other US and foreign pending patent applications.
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