7880 Driver catches on fire!

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DBSAR
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LowLumen wrote:
We do have a measure of LED current at about 1A. A 219B runs about 3.25 watts at 1 Amp. …just curious if there is enough wasted heat on the driver to melt a solder joint and cause the short. Knowing current from the battery would get a close approximation at this point.

I am going to run the test again with a new 7880 driver in the light, but this time i will monitor the head from the driver closer with a infrared heat meter. if it gets really hot again i will try resistoring the current back a bit until it runs cooler.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

hank
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Curious if you got to that test of those drivers for NIMH.
I’d been thinking they’d be good for gifts to non-flashaholics with kids
But only because I thought they’d be less likely to catch fire ….

DBSAR
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hank wrote:
Curious if you got to that test of those drivers for NIMH. I’d been thinking they’d be good for gifts to non-flashaholics with kids But only because I thought they’d be less likely to catch fire ….

I still use these drivers in various lights with no problems. i also replaced this one here with the same driver in the padme and its working no problem. I have not ran another test on maximum mode yet however to see if it survives another test. Do yuo know of other good 1.5 volt boost drivers with good modes?

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

hank
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I don’t know anything for sure, looking hard.
Most of what I’ve found lately is at http://www.aliexpress.com/popular/ldch.html

Not sure what the difference is between LDCH-20 and LDCH-30
http://www.aliexpress.com/item/LD30-flashlight-driver-circuit-board-CR12...

H-Man
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Looks like the LD20, DX SKU 7880, and RV7 are the same thing.

I do horrible things to electronics in an effort to get them to do what I want.

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