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Super X-Drive(SXD-V3) repair

nmbusa

Member
Joined
Dec 23, 2008
Messages
81
Points
18
Hi ya fellas
For anyone like me mistakenly feeding reverse polarity to their x-drive and frying main ic.
If you have a hot air rework station give it a go.


20210614_123255.jpg

set pot at around 1.4 KOhms outputing a nice 4.7Amps
20210614_193452.jpg20210614_193151.jpg

just have to dig up a 2k and 4.7k res to parallel
worked for me like a charm. cheers
 
Last edited:



RedCowboy

Well-known member
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Jul 10, 2015
Messages
10,757
Points
113
You are just making waste heat in a hurry pushing a nubm44 above 4.5a and knocking your output down unless you only lase for a few seconds from a cold start, to do any good beyond 4.5a you need active cooling.
 

Commander J. Bloodmaker

Active member
Joined
Apr 14, 2021
Messages
119
Points
28
I run my 44 @ 2.5 to 3, active cooling, with pelter if i so wish to stabilize the wave. I can run it way , way higher with temps staying reasonable. I like it though, and don't want to kill it.
 

Andrew124C41

Active member
Joined
Jul 3, 2015
Messages
548
Points
43
Hi ya fellas
For anyone like me mistakenly feeding reverse polarity to their x-drive and frying main ic.
If you have a hot air rework station give it a go.


View attachment 72978

set pot at around 1.4 KOhms outputing a nice 4.7Amps
View attachment 72981View attachment 72982

just have to dig up a 2k and 4.7k res to parallel
worked for me like a charm. cheers
I accidentally did a reverse polarity goof. But, I don't understand the fix for it.
 

Andrew124C41

Active member
Joined
Jul 3, 2015
Messages
548
Points
43
have to change main ic which has blown even if no burn mark is visible ;)
I thought there was some kind of reverse polarity protection......something else that blows. Where do you get the IC? BTW, your opinion. I have used all of these.....which ones do you like...ACS, SuperX and Astral. What I like about both the ACS and the Astral is that you don't have to bridge resisters. The ACS seems to be very stable and hard to screw up.....but it is a little more difficult to thermally bond.
 

nmbusa

Member
Joined
Dec 23, 2008
Messages
81
Points
18
I thought there was some kind of reverse polarity protection......something else that blows. Where do you get the IC? BTW, your opinion. I have used all of these.....which ones do you like...ACS, SuperX and Astral. What I like about both the ACS and the Astral is that you don't have to bridge resisters. The ACS seems to be very stable and hard to screw up.....but it is a little more difficult to thermally bond.
as you're in the us of a, digikey mouser or straight from texas instruments.
only used super x which I got ages ago set at a fixed 2.4A for a NDB7875,now set at 4.7A
 

Andrew124C41

Active member
Joined
Jul 3, 2015
Messages
548
Points
43
as you're in the us of a, digikey mouser or straight from texas instruments.
only used super x which I got ages ago set at a fixed 2.4A for a NDB7875,now set at 4.7A
For a 7875...4.7...a lot of juice! Do you know the part number for the ic
 

nmbusa

Member
Joined
Dec 23, 2008
Messages
81
Points
18
cummon now not to be rude look carefully at whole post 4.7A of "juice"is for NUBM44
part number is in photo ;)
 




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