Timeline for Low Rds MOSFET is heating a lot when powering a 3 W LED. How can I modify my circuit to correct it?
Current License: CC BY-SA 4.0
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| Dec 18, 2022 at 23:37 | comment | added | greybeard |
(Russel beat me in analysing what happens when a high side switch is turned off while there is energy in the inductor: Nothing good if it is a series switch. Manageable when shunting the LED current. I'd have said good to go until reading When the LED is off, […] the inductor heats more than when it´s on.)
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| Dec 18, 2022 at 23:24 | comment | added | Rodrigo | This end of the cable stays close to the body, it´s a headlamp. The led driver heats a little, so I want to keep it away with the battery. How would I wire a high side switch? The PT4115 and inductor heats a little, and normally (using the DIM pin for turning on/off/pwm) , when the led is off, it doesn´t heat at all | |
| Dec 18, 2022 at 18:30 | history | edited | greybeard | CC BY-SA 4.0 |
continue stating the obvious
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| Dec 18, 2022 at 17:44 | history | answered | greybeard | CC BY-SA 4.0 |