Hello!
I got a MCP23017 chip to work with one of my raspberries. I can blink a LED and control it.
However, i am a little concerned by the temperature of the chip, it is burning hot, and i measured
at least 75°C with a TMP36 and a MCP3008 DAC on the same raspberry pi.
Is it normal? the chip has been running at this high temperature for at least 10 hours.
What do you think?
MCP23017 chip becomes very hot, used with a raspberry pi
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Please be positive and constructive with your questions and comments.
- sky99
- Posts: 21
- Joined: Sat Nov 24, 2012 10:00 am
- adafruit_support_bill
- Posts: 88089
- Joined: Sat Feb 07, 2009 10:11 am
Re: MCP23017 chip becomes very hot, used with a raspberry pi
That does sound warmer than normal. Are you using a current limiting resistor on your LED?
- sky99
- Posts: 21
- Joined: Sat Nov 24, 2012 10:00 am
Re: MCP23017 chip becomes very hot, used with a raspberry pi
Hi,
I have a resistor, and i also removed the LED (so the circuit for the LED is opened, and nothing is plugged in),
but the chip is still very hot.
I have a resistor, and i also removed the LED (so the circuit for the LED is opened, and nothing is plugged in),
but the chip is still very hot.
- adafruit_support_bill
- Posts: 88089
- Joined: Sat Feb 07, 2009 10:11 am
Re: MCP23017 chip becomes very hot, used with a raspberry pi
It should not be hot at all with no load. What do you have connected besides VDD & VSS?
- sky99
- Posts: 21
- Joined: Sat Nov 24, 2012 10:00 am
Re: MCP23017 chip becomes very hot, used with a raspberry pi
My wiring is :
- VDD to +3.3v
- VSS to ground
- SCL to pi cobler SCL
- SDA to pi cobler SDA
- A0 to ground
- A1 to ground
- A2 to ground
- RESET to +3.3v
- adafruit_support_rick
- Posts: 35092
- Joined: Tue Mar 15, 2011 11:42 am
Re: MCP23017 chip becomes very hot, used with a raspberry pi
Can you post a picture of your wiring and assembly?
Please be positive and constructive with your questions and comments.