MAX1044 problem

[Ed G.]

I wired up a MAX1044 chip as per RG's schem on veroboard. I stuck it in between the DC jack and the power input of the bsiab.
I powered it up using a onespot adapter (that measures at 9.4v unloaded) and all it does is make my LED blink.
It's funny because the LEDs are wired to the 9V side.
Is this chip dead?

[igor12]

MAXIM chips blow very easily.  Double check the wiring on the DC jack. Does the DC jack have a switch built into it? Also, the MAX1044 has a max voltage input of like 12v or something.

[Ed G.]

When you insert the plug, it switches the battery off.
My adapter only puts out 9.4v, which I realize is at the upper end of its limits, but it should be safe.

[soulsonic]

You must beware of ESD. It is a CMOS device.

[Ed G.]

Here in south La., we have very high humidity, that's not to say static couldn't have zapped it, I don't know.

I'm just curious about how this chip operates when it fails. My status LEDs are blinking. And I power the LEDs from the 9V side of the charge pump.

I don't understand why should the input side voltage be affected.

I wired the charge pump's input to the DC jack, which switches between DC and battery. The output goes to the circuit board's power input.

[Kleber AG]

My status LEDs are blinking. And I power the LEDs from the 9V side of the charge pump.

Your circuit (whatever is connected to the power supply) is trying to take more current than your adapter can deliver (the adapter probably has something like a 9V regulator) when it hapens it causes this kind of blinking behavior.

And/or something on your circuit is over heating the adaptor regulator... maybe some mistake on the circuit...

[Ed G.]

Got it! The veroboard had continuity where I thought I had cut the trace.
Due to the location, it wasn't clear. I thought I had tested everything out with a meter.
My first veroboard circuit, I guess it was a good one to test my 'skillz' on.
Thanks to everyone who tried to help this clumsy knucklehead.

[Paul Perry (Frostwave)]

Not to derail the thread, but...
I'm a vero (stripboard) fan, but whenever I build something, I use the meter to check for shorts between adjacent traces BEFORE powering up.
Might as well do it BEFORE any stuff gets fried...