Hi,
I'm working on a project for a high power LED controller which is powered by 12V.
The LEDs run at 12V and the microcontroller system works at 5V so I'm using a 5V LDO to convert the 12V input down for the microcontroller.
Ok, so I plugged in my circuit using a bench power supply @12V and the circuit works fine, which I'm happy about. Then I switched that power supply for a transformer (like laptop charger or external HDD supply) and my LDO fried.
I tested the transformer with my multimeter and it's giving out 12V. Is there something I don't know about mixing voltage converters?
I should probably point out that the transformer is pretty cheap.
Also, I replaced the LDO and went back to the bench PSU and the circuit is working fine again, amazing unaffected by the fact that the LDO was clearly drawing too much current.
I'm working on a project for a high power LED controller which is powered by 12V.
The LEDs run at 12V and the microcontroller system works at 5V so I'm using a 5V LDO to convert the 12V input down for the microcontroller.
Ok, so I plugged in my circuit using a bench power supply @12V and the circuit works fine, which I'm happy about. Then I switched that power supply for a transformer (like laptop charger or external HDD supply) and my LDO fried.
I tested the transformer with my multimeter and it's giving out 12V. Is there something I don't know about mixing voltage converters?
I should probably point out that the transformer is pretty cheap.
Also, I replaced the LDO and went back to the bench PSU and the circuit is working fine again, amazing unaffected by the fact that the LDO was clearly drawing too much current.