Jun 11, 2018
11:06 PM
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Jun 11, 2018
11:06 PM
VDDEXT is a 5V LDO in the device which is able to supply external loads(e.g. Sensors) . It can be activated and deactivated by the software.
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- IFX
11 Replies
Jun 11, 2018
11:10 PM
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Jun 11, 2018
11:10 PM
VDDEXT is designed to be used off-board of the ECU. However, VDDEXT is not protected against high voltages (e.g. caused by a short circuit to the battery supply voltage).
The TLE986x and TLE987x device families also offer an internal protection against overcurrent.
The TLE986x and TLE987x device families also offer an internal protection against overcurrent.
Jun 11, 2018
11:11 PM
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Jun 11, 2018
11:11 PM
For the TLE987x device family, there are internal overload, overvoltage, undervoltage and overcurrent detectors. If enabled, all of them will trigger an interruption in case of such a detection. Similar detectors also exists for other device families.
Jun 11, 2018
11:11 PM
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Jun 11, 2018
11:11 PM
Yes. If VDDEXT is externally connected to the VAREF pin, it is important to deactivate the internal 5V-Varef LDO, before activating VDDEXT. Otherwise 2 LDOs will try to supply each other, which will cause malfunction.
Jun 11, 2018
11:12 PM
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Jun 11, 2018
11:12 PM
We strongly recommend, NOT to use VDDC for other loads or components.
Jun 11, 2018
11:14 PM
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Jun 11, 2018
11:14 PM
The VDDC is the internal core voltage. The integrated VDDC LDO requires an external buffer cap.
Jun 11, 2018
11:15 PM
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Jun 11, 2018
11:15 PM
The VDDP is the internal pad supply, it is used to supply the GPIOs, ADC1 and other 5V related modules inside the device. The integrated VDDP LDO requires an external buffer cap.
Jun 11, 2018
11:28 PM
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Jun 11, 2018
11:28 PM
In principle possible, but it is recommend to use VDDEXT instead. VDDP is usually used to supply an external ISP (debugger), in case of debugging the software or downloading code.
Jun 11, 2018
11:30 PM
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Jun 11, 2018
11:30 PM
In principle possible, but it is recommend to use VDDEXT instead. VDDP is usually used to supply an external ISP (debugger), in case of debugging the software or downloading code.
Jun 12, 2018
12:23 AM
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Jun 12, 2018
12:23 AM
This thread is a collection of voltage regulator related questions.
May 21, 2021
02:07 PM
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May 21, 2021
02:07 PM
I am trying to activate VDDEXT but I cannot. Can you show me where to activate it? Please see the picture attached. Is it correct?
Thank you Eugene
Thank you Eugene
May 24, 2021
09:20 AM
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May 24, 2021
09:20 AM
From the IFXConfigWizard --> PMU --> VDDEXT --> Click the Turn on. I tried this and it work.
Thanks.
Thanks.