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Incandescent lamp on XC23

Guillaume Fournier 11 months ago in Expansion modules / XC2x updated by Gustav Widén (System support) 11 months ago 1

Hello,

I am using a DOUT LS on XC23 to drive a 12V incandescent bulb on an instrument panel.  In steady state, the lamp draws 85 mA.  I am getting an overload on this output when I try to activate the lamp.  I was able to temporarely solve the problem by using a 22 ohms in series with the load.  So I believe the problem is the inrush current of the lamp.  The instruction book of the XC23 clearly states that the LS DOUT "are designed to drive small loads, e.g. lamps and buzzers".  The example even shows a lamp being driven by a LS DOUT.

Can you explain if I'm doing something wrong.  If not, is there any fix available to solve this issue ?

Thanks,

Guillaume

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XC-23 minimum input voltage

Guillaume Fournier 5 months ago in Expansion modules / XC2x updated by Gustav Widén (System support) 5 months ago 1

Hello,

I have an H-Bridge that drives a DC brushed motor on 12V. I need to determine the PWM ratio being supplied to this motor by the H-Bridge. There is no other signal that could get me this information so I am contemplating hooking both sides of this motor to PWM inputs on the XC-23. Before doing such a thing, I looked at the signal using an oscilloscope. Basically, the signal is 0-12V most of the time but dips below 0V when the ON time finishes. The lowest voltage read with the scope is -11V for a short period of time.

There are no Absolute Requirements for negative voltages on inputs in the datasheet of the XC-23. What is the absolute minimum voltage that can be applied to a PWM input of the XC-23 without damaging it ?

Guillaume

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Answered

Low side outputs protection diode

Guillaume Fournier 12 months ago in Expansion modules / XC2x updated by Gustav Widén (System support) 12 months ago 1

Hello,

I need to drive relays on low side outputs on the XC-23 and MD4-5.  Do I need to use relays with included coil protection diodes or if the outputs of these modules are already internally protected ?

Thanks,

Guillaume

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Answered

Using two(2) or more low side outputs in parallel on XC-23

Guillaume Fournier 12 months ago in Expansion modules / XC2x updated by Gustav Widén (System support) 12 months ago 1

Hello,

I'm wandering if I could use two(2) or more low side outputs in parallel on the XC-23 to increase the carrying current capacity from 300mA to 600mA (2 outputs) or more.  I have a relay that I need to drive that needs more than 300mA.

Thanks,

Guillaume

0
Answered

Difference between XC21, XC22 and XC23

Kevin Arscott 5 years ago in Expansion modules / XC2x updated 5 years ago 3
What are the differences between these modules? There doesn't seem to be any information online or in IQAN Design user manual.

Thanks.