Normally, a power component like this would have a big pad and some heat dissipation space under the heat slug. It might even have thermal vias going to another heat pad on the back side of the board. If it’s being run at anything close to it’s full current capability, that would be a requirement. This one is probably a bit underutilized though, rendering the big pad un necessary. It’s still a good idea for mechanical strength, but in the prototype world, we don’t always follow the rules
The problem here though, is that the open vias under the part can short to the thermal pad. That’s bad mojo. Some board fab houses can put a solid coat of mask over the vias and they’ll be okay. Not all board houses will do that though, and if the board has a silver finish (this one is HASL), you wouldn’t want the vias sealed because silver vias can outgas and corrode if completely sealed.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Maker Business — Foxconn executive discusses the dramatically scaled back project in Wisconsin
Wearables — Flex your mind, flex your circuit board
Electronics — Damp Sponge vs Drenched Sponge
Python for Microcontrollers — Python on Microcontrollers Newsletter: New CircuitPython and MicroPython Minor Updates and More! #Python #CircuitPython @micropython @ThePSF
Adafruit IoT Monthly — eInk Postcard, VR Spectrum Instrumentation, and more!
Microsoft MakeCode — MakeCode Thank You!
EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey
New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — JP’s Product Pick of the Week 6/28/22 USB/DC/Solar LiPo Charger bq24074 @adafruit @johnedgarpark #adafruit #newproductpick
Sorry, the comment form is closed at this time.