Ho do I test a TI PTR08100W?

[Big Fran]

I have a TI PTR08100W but I think its bad. Is there some way to test it?

Fran

 

[Dalton63841]

Voltage in to pin 2, ground to pin 3, with a multimeter you should read the same voltage out as voltage in minus a small overhead on pin 4.

 

[Big Fran]

Voltage in to pin 2, ground to pin 3, with a multimeter you should read the same voltage out as voltage in minus a small overhead on pin 4.

Thanks, I gave it a try... 8.4 volts on pin 2 and 0 volts on pin 4. I must have got a bad one. I havent even sodered on it yet.

 

[Java_Az]

I would take a ohm meter and test for short circuits And also make sure the circuit is complete where it needs to be. For example make sure pin 2 and pin 3 are not making contact also make sure pin 3 and pin 4 are not making contact. Pin 3 to pin 5 should be the resistance of the resistor and pot combined. Pin one should not be making contact with anything it should be open. Then you can check where your pin 2 wire goes into the board to pin 2 make sure that circuit is complete or closed. Do that with pin 3 to the gorund wire that supplies the board . Then check pin 4 to the output wire going to the atomizer. Check your switch also make sure it closes when you press on it. I would check all that and see if you can find a problem. Also if by chance your using electrolytic caps they have to be hooked up properly positive to positive and the neg to neg. But if they were backwards they really should have popped or exploded. Ceramic caps doesn't matter how you hook them up. That should give you a place to start looking and testing.

Edit: Should also make sure pin 5 and 4 are not making contact or short circuited also

 

[Big Fran]

I would take a ohm meter and test for short circuits And also make sure the circuit is complete where it needs to be. For example make sure pin 2 and pin 3 are not making contact also make sure pin 3 and pin 4 are not making contact. Pin 3 to pin 5 should be the resistance of the resistor and pot combined. Pin one should not be making contact with anything it should be open. Then you can check where your pin 2 wire goes into the board to pin 2 make sure that circuit is complete or closed. Do that with pin 3 to the gorund wire that supplies the board . Then check pin 4 to the output wire going to the atomizer. Check your switch also make sure it closes when you press on it. I would check all that and see if you can find a problem. Also if by chance your using electrolytic caps they have to be hooked up properly positive to positive and the neg to neg. But if they were backwards they really should have popped or exploded. Ceramic caps doesn't matter how you hook them up. That should give you a place to start looking and testing.

I was just checking the loose chip. I had it built up on a bredboard and it did not work. When I checked the chip I checked it loose off the bredBoard.

 

[Java_Az]

Needs to be hooked up and fully wired up to test it correctly. Having it off the board without the resistors in place wont tell you much. Not sure you got that chip into a bread board in the first place the pin spacing is tiny. I guess you bent the pins , I think in rare cases bending the pins can render the chip non workable.

 

[Big Fran]

I might have messed it up bending the pins.

It makes sense to me that if I put voltage in I should get voltage out.

I do think if it was a working chip it's not one now.

Fran

 

[Java_Az]

Might not be fried. If pin one is grounded it puts the reg to sleep you wont get a output voltage. You also need a resistance between pin 3 and pin 5 that sets the output voltage. If you have no ground going to pin 5 with resistance , in other words if pin 5 is left open i dont think you will get a output voltage. So you need at least a 220 ohm resistor between those two pins data sheet says 240ohm but 220 is used alot and should give you a output voltage of 5.8 to 6 volts. So the chip can be good still just needs to be hooked up correctly before powering on. Using the tests i posted can ensure that. They should be done before powering on to make sure all is well.