[Moved] Projects share---DC/DC module with AS1337

[shirleywj]

I create this topic to show my recent peoject DC/DC module. This is small module for AS1337. The shematic is simple and provides all required components to operate AS1337. The PCB is 18x15mm miniature module with all pins at one side.




The efficiency can be above 90% at certain load conditions.



The AS1337 came in two variants: “A” and “B”. The “A” variant disconnects the battery when in power-down mode (disabled) and “B” keeps battery connected in power down mode.

I ordered plenty of PCBs from PCBWAY. They have excellent quality, good prices and they are reasonably fast.

Meanwhile, here’s the altium project for this mighty module:
View attachment AS1337.zip

Finished and tested module:

 

[showmy]

Is this a low power DC/DC module? How much for the whole project? I usually live in USA. But the PCBA fabs I have found here have been very expensive unless it is mass producing.

 

[shirleywj]

Is this a low power DC/DC module? How much for the whole project? I usually live in USA. But the PCBA fabs I have found here have been very expensive unless it is mass producing.

Yes it is kind of low power. I usually get components from digikey. The price there is reasonable, and get PCBs from pcbway. Their price is good and especially 2-layer pcbs. It is very cost effective. Usually, my customs clearance procedure takes longer than production and shipment. I bought them in pcs so it is hard say how much each one.