TS12A12511: Strange behavior

user4646208

Part Number: TS12A12511

I use TS12A12511 to modulate the voltage that sets the current (-2.5V - +2.5V).
At the moment on NC and NO I have 0V.

I noticed that my MCU was very warm.
Seems I have -5V on my input IN.
At the moment the open drain is on the MCU and there is no PWM.

over 6 years ago

0 Fan.Wang over 6 years ago

TI__Intellectual 2900 points

Hello,

My understanding is that IN's voltage becomes -5V for some reason and IN is driven by a microcontroller.

I suspect there is a short circuit between your -5V rail to IN pin. I would take out TS12A12511 and see if this -5V still exists on CHANNEL1_PWM.

0 Adam Torma over 6 years ago in reply to Fan.Wang

TI__Mastermind 45340 points

User4646208,

We haven't heard from you in a while. Has Fan answered your question? Do you have a resolution to this issue?

Thank you,
Adam

0 user4646208 over 6 years ago in reply to Adam Torma

Intellectual 580 points

Hello.
Yes, the problem was in short circuit on the MCU

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TS12A12511: Strange behavior