ok, i checked with the eurocircuits online system, they can't handle the power board.
the LTC4155 is handling 4 amps, so the app note says that 2oz copper is needed. however, eurocircuits require a minimum track-to-track clearance of 10mil which is totally incompatible with the distance even between pads of the LTC4155 IC!
therefore we conclude, simply, that eurocircuits doesn't have good enough equipment, therefore it is necessary to find an alternative PCB prototyping company.
i've managed to get the track-to-track distance to 7mil, smallest via is 10mil with a 24mil ring, track width is a minimum of 8mil, and the size of the PCB is tiny: 3.4in x 1.2in. it's only two layer, components only on one side, but the copper needs to be 2oz.
can anyone help with PCB manufacturing at all?
tia,
l.
On 03/09/15 02:12, Luke Kenneth Casson Leighton wrote:
ok, i checked with the eurocircuits online system, they can't handle the power board.
It's worth actually contacting PCB vendors with your requirements. The specs listed for the online pool/quick quote type services are often not the absolute limits of what the vendor can do.
the LTC4155 is handling 4 amps, so the app note says that 2oz copper is needed. however, eurocircuits require a minimum track-to-track clearance of 10mil which is totally incompatible with the distance even between pads of the LTC4155 IC!
LTC recommend 0.25 mm pads and the chip has a 0.5 mm pad pitch which leaves a 0.25 mm between pads.
That is under 10 mil but only barely.
therefore we conclude, simply, that eurocircuits doesn't have good enough equipment, therefore it is necessary to find an alternative PCB prototyping company.
i've managed to get the track-to-track distance to 7mil, smallest via is 10mil with a 24mil ring, track width is a minimum of 8mil, and the size of the PCB is tiny: 3.4in x 1.2in. it's only two layer, components only on one side, but the copper needs to be 2oz.
can anyone help with PCB manufacturing at all?
If you get desperate then contact zot, if they can't make it then proabablly noone can.
Pls try to contact this guy:
Shenzhen Xinjiaye Electronics Technology Co.,ltd
508Room Yong Hui building Bao Yuan Road Shenzhen city,China TEL:+86-755-21638081 Mobile:+86-13603083165 Skype:nbdyummy www.szxjypcb.com sales-yummy@xjypcb.cn
*Global Sources Electronic Components ShowDate: 11th October 2015Place: AsiaWorld-Expo, Hong KongBooth: 9G13*
*At very least you will get advice. They do prototypes but i don't know about price. You can send him gerber files to check. If you decide they make you complete prototypes,be extra careful with parts. When they buy on local market they can mess / switch parts.*
On Saturday, September 12, 2015, peter green plugwash@p10link.net wrote:
On 03/09/15 02:12, Luke Kenneth Casson Leighton wrote:
ok, i checked with the eurocircuits online system, they can't handle the power board.
It's worth actually contacting PCB vendors with your requirements. The specs listed for the online pool/quick quote type services are often not the absolute limits of what the vendor can do.
the LTC4155 is handling 4 amps, so the app note says that 2oz copper is needed. however, eurocircuits require a minimum track-to-track clearance of 10mil which is totally incompatible with the distance even between pads of the LTC4155 IC!
LTC recommend 0.25 mm pads and the chip has a 0.5 mm pad pitch which leaves a 0.25 mm between pads.
That is under 10 mil but only barely.
therefore we conclude, simply, that eurocircuits doesn't have good enough equipment, therefore it is necessary to find an alternative PCB prototyping company.
i've managed to get the track-to-track distance to 7mil, smallest via is 10mil with a 24mil ring, track width is a minimum of 8mil, and the size of the PCB is tiny: 3.4in x 1.2in. it's only two layer, components only on one side, but the copper needs to be 2oz.
can anyone help with PCB manufacturing at all?
If you get desperate then contact zot, if they can't make it then proabablly noone can.
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Hrvoje Lasic -
Luke Kenneth Casson Leighton -
peter green