Part Number: LAUNCHXL-F28379D Other Parts Discussed in Thread: TL082 Tool/software: Hello, I am working on a project where I need to power the Launchpad from external power supply. I removed jumper JP1, JP2, JP3 to isolate xds100v2 and added JP6 to activate internal stepup, then i applied GND and 3.3V on connector J10, from external power supply. It did't work. Sometimes do not power on at all, sometimes behaves unstable (for examaple i see pwm signal appearing and diappearing, SCI1 emitting strange characters and so on). I am using an external bench dual power supply (because i have to deal with negative signals and some op amps which are TL082 between +5V and -5V) and i powered the launchpad by connecting J10 between virtual GND and 3.3V using a 3V3 LDO placed bewteen 0 and 5V. Also tried to give 3.3V to the launchpad directly from the power supply. The result did not change. Do you have any hint? Can i power the launchpad by applying 5V on pin JP3 (on hte XDS100 side) wuth usb cable disconnected, and connecting the jumper on JP3, to use the TPS62162DSGT step-down, or i risk to damage XDSV100? Note the launchpad returns fully functional if i power from USB, so i would tend to exclude damages to the board. Thanks in advance Damiano Rullo ITALOGIC
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