we would like to design ADuM5401, but I confused the layout.
as checked datasheet the air distance is 8.0mm here, I saw the ADuM5401 package is 7.6mm
what can I do to increase the distance ??
I assume you need a higher creepage and clearance like 8mm, not the 7.6mm? If so, the ADuM6401 has an RI - 16 package that is longer at the ends for increased creepage of 8.3mm. The ADuM6401 works like the ADuM5401, but has higher isolation capability and as a result can not supply as much output current as the ADuM5401, so check the specification tables for the input output voltage of the application you are using.
If you use the ADuM6401 please note that it is not entirely pin to pin, it has a pin 7 that is VDDL and needs to be connected to power, same as the VDD1 pin. On the ADuM5401 pin 7 is an output called RCout (used for synchronizing the PWM switching frequency of the Viso output of multiple isoPower devices).
I think package dimensions cant meet the table 16 request the air/distance/creepage here.
would you help to check this : )
Kevin: The ADuM6401 has the RI package available which has expanded creepage of 8.3mm as seen in its table 16, attached. Can you use the ADuM6401 in RI package?
of course we can , thanks for your comments
Sir , I checked datasheet table7. if use ADuM6504 at 25Mbps condition that means Load is 28mA there. (Vcc=3.3V)
I interested 28mA that include digital channel loading right? if no how do to know the digital channels loss there??
May I know the digital channels loss?? thanks
Yes, Table 7 means the ADuM6404 can also provide 28mA typical to a external load in addition to providing the current for the internal load from the 25Mbps digital channels.
How about ADuM6404 parallel ?? does any concern there? I would like Pout more bigger
Kevin: Unfortunately, the ADuM640x does not act as a slave or master device to parallel the outputs together to get more output power. The ADuM540x does have the capability to act as a slave or master device to parallel the outputs together to get more output power, but I think you have a need for more creepage and clearance in the RI package with the ADuM640x. There are 2 ways to get more output power:
1. Use a standard digital isolator with more creepage and clearance in the RI package, the ADuM440x. Then use a ADuM6000 as a master and a ADuM6000 as a slave to get the power of 2 ADuM6000's.
2. Use one ADuM447x which has 4 digital isolator channels and has more creepage and clearance in the RI package, with up to 400mA output current at 5V. This solution requires the use of an external transformer, schottky diodes and an inductor, which requires some extra board space, especially the transformer.
Retrieving data ...