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Circuit Break - A MacroFab Podcast
Trailer
Bonus
Episode 262
Season 1
MEP EP#262: Flex PCB Primers
MEP EP#262: Flex PCB Primers
Parker
- Robert Feranec
- Published a video about what to consider when selecting chips for your new board design.
- Don’t want to steal Robert's content so go check him out.
- Hardware design and PCB Layout online course
- Published a video about what to consider when selecting chips for your new board design.
- Comprehensive Power Supply System Designs for Harsh Automotive Environments Consume Minimal Space, Preserve Battery Charge, Feature Low EMI
- Analog engineer Bin Wu and previous Linear Tech engineer Zhongming Ye writing an application note with linear tech devices.
- ‘An Ideal Diode Satisfies Automotive Immunity Norms’
- LT8672
- Active rectifier controller
- LT8672
- Why is all this needed?
- Car power is dirty
- Load dumps
- Cold cranking
- Pulses
- ISO 7632-2 is a negative spike whose peak voltage exceeds −220 V!
- Reverse Polarity
- AC Ripple
- Car power is dirty
Stephen
- Wurth Elektronik on Flex PCBs
- Basically Polyimide foil with deposited copper
- 3 ways to create a system (from page 2)
- Heterogeneous
- Homogeneous
- Partial Homogeneous
- Full flex and Semiflex
- Much Much easier way to create a 3d system design
- Added benefit of having a full panelized system
- Can test a full panel of designs all at once
- Test points can technically be on the flex
- Break and make
- Take the rails off of the PCB
- Flex-rigid boards
- Can be bonded to external layers
- Can be internal
- Can be rigid on one side or both
- Can be multiple layers
- Layout and routing
- Create a new layer in your EDA tool to define the Flex portion
- No vias in flex portion
- Use teardrops for added rigidity
- Use wider tracks where possible for added strength
- Do not change width in bend area
- Distribute conductors evenly
- Documentation
- Do it... Do it a lot
- In addition to the PCB gerber or ODB++ files include drawings
- A fab drawing that defines the flex pcb is very helpful