Why is low-side switching always recommended? It is not always needed to be. For simple load such as LEDs, consider using high-side switching to reduces power consumption. How? Because bias current is not wasted, instead it helps source power to the LED.
As you can see, both circuits provide about 18mA to light up the LED, but on the low side switching, 4.3mA is being wasted! Just something to consider when you design something that runs on battery
As you can see, both circuits provide about 18mA to light up the LED, but on the low side switching, 4.3mA is being wasted! Just something to consider when you design something that runs on battery