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Question on Lazeerer nano buck/boost

Shotgundrums

Shotgundrums

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Jun 14, 2017
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As you all are aware, nano drivers are nonexistent. I damaged (crushed corner) the inductor on my last nano driver😩😭. She dead.
Do any of you guys know the value of this driver’s inductor? I’d hate to lose this driver over this. Thanks in advance guys.
SGD🥃
 
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Shotgundrums said:
As you all are aware, nano drivers are nonexistent. I damaged (crushed corner) the inductor on my last nano driver😩😭. She dead.
Do any of you guys know the value of this driver’s inductor? I’d hate to lose this driver over this. Thanks in advance guys.
SGD🥃
Click to expand...
Send over a pic, I think one of the spare 4.7uH ones from Panasonic I have for my 1A boosts will do the trick. Take some dimensions and send em over ill see what fits best.
 
Here are a couple pics; one of mine and one from DTRs page: it looks like a sort of A and maybe a 7...? Not your typical 3R3, 4R7, 220 (3.3, 4.7, 22uH) so beats me. Lemme know what you think. Thx for help.
SGD
 

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Welp, Lifetime17 sent me a couple dead nanos. I unsoldered the inductors, and soldered one of each to my busted driver. Sadly, I was not able to derive any current from the driver; only, the inductor and current setting resistors got really hot. The ohms of the resistors seem to be fine. I also checked the caps, too. Maybe the IC was damaged and current has nowhere to go🤷‍♂️
Thanks again, Rich! It was worth a shot.
SGD
 
Shotgundrums said:
Welp, Lifetime17 sent me a couple dead nanos. I unsoldered the inductors, and soldered one of each to my busted driver. Sadly, I was not able to derive any current from the driver; only, the inductor and current setting resistors got really hot. The ohms of the resistors seem to be fine. I also checked the caps, too. Maybe the IC was damaged and current has nowhere to go🤷‍♂️
Thanks again, Rich! It was worth a shot.
SGD
Click to expand...
Most likely the internal fet switch in the IC blew up itself because the inductor lost a lot of its inductance and even short-circuited.
 
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