Dear seniors, I need to make a PCB with a BGA packaged chip on it. The ball is 0.25mm and the ball distance is 0.4mm. Therefore, when the BGA area is fanned out, the blind hole can only be made on the...
I submitted my resume at the job fair of the College Student Employment Center. I applied for a position in CNC system maintenance and testing. A CNC company notified me for an interview the next day....
Specific requirements:
DC-DCinput 5VLED boost chip (can also be used for buck, I made a boost circuit at the input end)Vout1 4 5-7V, Io1=100mA can be connected in series or in parallelVout2 4 3.0-3.3V...
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PCB Design
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